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cpython/Lib/lib2to3/tests/test_fixers.py

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""" Test suite for the fixer modules """
# Python imports
import os
import unittest
from itertools import chain
from operator import itemgetter
# Local imports
from lib2to3 import pygram, pytree, refactor, fixer_util
from lib2to3.tests import support
class FixerTestCase(support.TestCase):
# Other test cases can subclass this class and replace "fixer_pkg" with
# their own.
def setUp(self, fix_list=None, fixer_pkg="lib2to3", options=None):
if fix_list is None:
fix_list = [self.fixer]
self.refactor = support.get_refactorer(fixer_pkg, fix_list, options)
self.fixer_log = []
self.filename = "<string>"
for fixer in chain(self.refactor.pre_order,
self.refactor.post_order):
fixer.log = self.fixer_log
def _check(self, before, after):
before = support.reformat(before)
after = support.reformat(after)
tree = self.refactor.refactor_string(before, self.filename)
self.assertEqual(after, str(tree))
return tree
def check(self, before, after, ignore_warnings=False):
tree = self._check(before, after)
self.assertTrue(tree.was_changed)
if not ignore_warnings:
self.assertEqual(self.fixer_log, [])
def warns(self, before, after, message, unchanged=False):
tree = self._check(before, after)
self.assertIn(message, "".join(self.fixer_log))
if not unchanged:
self.assertTrue(tree.was_changed)
def warns_unchanged(self, before, message):
self.warns(before, before, message, unchanged=True)
def unchanged(self, before, ignore_warnings=False):
self._check(before, before)
if not ignore_warnings:
self.assertEqual(self.fixer_log, [])
def assert_runs_after(self, *names):
fixes = [self.fixer]
fixes.extend(names)
r = support.get_refactorer("lib2to3", fixes)
(pre, post) = r.get_fixers()
n = "fix_" + self.fixer
if post and post[-1].__class__.__module__.endswith(n):
# We're the last fixer to run
return
if pre and pre[-1].__class__.__module__.endswith(n) and not post:
# We're the last in pre and post is empty
return
self.fail("Fixer run order (%s) is incorrect; %s should be last."\
%(", ".join([x.__class__.__module__ for x in (pre+post)]), n))
class Test_ne(FixerTestCase):
fixer = "ne"
def test_basic(self):
b = """if x <> y:
pass"""
a = """if x != y:
pass"""
self.check(b, a)
def test_no_spaces(self):
b = """if x<>y:
pass"""
a = """if x!=y:
pass"""
self.check(b, a)
def test_chained(self):
b = """if x<>y<>z:
pass"""
a = """if x!=y!=z:
pass"""
self.check(b, a)
class Test_has_key(FixerTestCase):
fixer = "has_key"
def test_1(self):
b = """x = d.has_key("x") or d.has_key("y")"""
a = """x = "x" in d or "y" in d"""
self.check(b, a)
def test_2(self):
b = """x = a.b.c.d.has_key("x") ** 3"""
a = """x = ("x" in a.b.c.d) ** 3"""
self.check(b, a)
def test_3(self):
b = """x = a.b.has_key(1 + 2).__repr__()"""
a = """x = (1 + 2 in a.b).__repr__()"""
self.check(b, a)
def test_4(self):
b = """x = a.b.has_key(1 + 2).__repr__() ** -3 ** 4"""
a = """x = (1 + 2 in a.b).__repr__() ** -3 ** 4"""
self.check(b, a)
def test_5(self):
b = """x = a.has_key(f or g)"""
a = """x = (f or g) in a"""
self.check(b, a)
def test_6(self):
b = """x = a + b.has_key(c)"""
a = """x = a + (c in b)"""
self.check(b, a)
def test_7(self):
b = """x = a.has_key(lambda: 12)"""
a = """x = (lambda: 12) in a"""
self.check(b, a)
def test_8(self):
b = """x = a.has_key(a for a in b)"""
a = """x = (a for a in b) in a"""
self.check(b, a)
def test_9(self):
b = """if not a.has_key(b): pass"""
a = """if b not in a: pass"""
self.check(b, a)
def test_10(self):
b = """if not a.has_key(b).__repr__(): pass"""
a = """if not (b in a).__repr__(): pass"""
self.check(b, a)
def test_11(self):
b = """if not a.has_key(b) ** 2: pass"""
a = """if not (b in a) ** 2: pass"""
self.check(b, a)
class Test_apply(FixerTestCase):
fixer = "apply"
def test_1(self):
b = """x = apply(f, g + h)"""
a = """x = f(*g + h)"""
self.check(b, a)
def test_2(self):
b = """y = apply(f, g, h)"""
a = """y = f(*g, **h)"""
self.check(b, a)
def test_3(self):
b = """z = apply(fs[0], g or h, h or g)"""
a = """z = fs[0](*g or h, **h or g)"""
self.check(b, a)
def test_4(self):
b = """apply(f, (x, y) + t)"""
a = """f(*(x, y) + t)"""
self.check(b, a)
def test_5(self):
b = """apply(f, args,)"""
a = """f(*args)"""
self.check(b, a)
def test_6(self):
b = """apply(f, args, kwds,)"""
a = """f(*args, **kwds)"""
self.check(b, a)
# Test that complex functions are parenthesized
def test_complex_1(self):
b = """x = apply(f+g, args)"""
a = """x = (f+g)(*args)"""
self.check(b, a)
def test_complex_2(self):
b = """x = apply(f*g, args)"""
a = """x = (f*g)(*args)"""
self.check(b, a)
def test_complex_3(self):
b = """x = apply(f**g, args)"""
a = """x = (f**g)(*args)"""
self.check(b, a)
# But dotted names etc. not
def test_dotted_name(self):
b = """x = apply(f.g, args)"""
a = """x = f.g(*args)"""
self.check(b, a)
def test_subscript(self):
b = """x = apply(f[x], args)"""
a = """x = f[x](*args)"""
self.check(b, a)
def test_call(self):
b = """x = apply(f(), args)"""
a = """x = f()(*args)"""
self.check(b, a)
# Extreme case
def test_extreme(self):
b = """x = apply(a.b.c.d.e.f, args, kwds)"""
a = """x = a.b.c.d.e.f(*args, **kwds)"""
self.check(b, a)
# XXX Comments in weird places still get lost
def test_weird_comments(self):
b = """apply( # foo
f, # bar
args)"""
a = """f(*args)"""
self.check(b, a)
# These should *not* be touched
def test_unchanged_1(self):
s = """apply()"""
self.unchanged(s)
def test_unchanged_2(self):
s = """apply(f)"""
self.unchanged(s)
def test_unchanged_3(self):
s = """apply(f,)"""
self.unchanged(s)
def test_unchanged_4(self):
s = """apply(f, args, kwds, extras)"""
self.unchanged(s)
def test_unchanged_5(self):
s = """apply(f, *args, **kwds)"""
self.unchanged(s)
def test_unchanged_6(self):
s = """apply(f, *args)"""
self.unchanged(s)
def test_unchanged_7(self):
s = """apply(func=f, args=args, kwds=kwds)"""
self.unchanged(s)
def test_unchanged_8(self):
s = """apply(f, args=args, kwds=kwds)"""
self.unchanged(s)
def test_unchanged_9(self):
s = """apply(f, args, kwds=kwds)"""
self.unchanged(s)
def test_space_1(self):
a = """apply( f, args, kwds)"""
b = """f(*args, **kwds)"""
self.check(a, b)
def test_space_2(self):
a = """apply( f ,args,kwds )"""
b = """f(*args, **kwds)"""
self.check(a, b)
class Test_reload(FixerTestCase):
fixer = "reload"
def test(self):
b = """reload(a)"""
a = """import imp\nimp.reload(a)"""
self.check(b, a)
def test_comment(self):
b = """reload( a ) # comment"""
a = """import imp\nimp.reload( a ) # comment"""
self.check(b, a)
# PEP 8 comments
b = """reload( a ) # comment"""
a = """import imp\nimp.reload( a ) # comment"""
self.check(b, a)
def test_space(self):
b = """reload( a )"""
a = """import imp\nimp.reload( a )"""
self.check(b, a)
b = """reload( a)"""
a = """import imp\nimp.reload( a)"""
self.check(b, a)
b = """reload(a )"""
a = """import imp\nimp.reload(a )"""
self.check(b, a)
def test_unchanged(self):
s = """reload(a=1)"""
self.unchanged(s)
s = """reload(f, g)"""
self.unchanged(s)
s = """reload(f, *h)"""
self.unchanged(s)
s = """reload(f, *h, **i)"""
self.unchanged(s)
s = """reload(f, **i)"""
self.unchanged(s)
s = """reload(*h, **i)"""
self.unchanged(s)
s = """reload(*h)"""
self.unchanged(s)
s = """reload(**i)"""
self.unchanged(s)
s = """reload()"""
self.unchanged(s)
class Test_intern(FixerTestCase):
fixer = "intern"
def test_prefix_preservation(self):
b = """x = intern( a )"""
a = """import sys\nx = sys.intern( a )"""
self.check(b, a)
b = """y = intern("b" # test
)"""
a = """import sys\ny = sys.intern("b" # test
)"""
self.check(b, a)
b = """z = intern(a+b+c.d, )"""
a = """import sys\nz = sys.intern(a+b+c.d, )"""
self.check(b, a)
def test(self):
b = """x = intern(a)"""
a = """import sys\nx = sys.intern(a)"""
self.check(b, a)
b = """z = intern(a+b+c.d,)"""
a = """import sys\nz = sys.intern(a+b+c.d,)"""
self.check(b, a)
b = """intern("y%s" % 5).replace("y", "")"""
a = """import sys\nsys.intern("y%s" % 5).replace("y", "")"""
self.check(b, a)
# These should not be refactored
def test_unchanged(self):
s = """intern(a=1)"""
self.unchanged(s)
s = """intern(f, g)"""
self.unchanged(s)
s = """intern(*h)"""
self.unchanged(s)
s = """intern(**i)"""
self.unchanged(s)
s = """intern()"""
self.unchanged(s)
class Test_reduce(FixerTestCase):
fixer = "reduce"
def test_simple_call(self):
b = "reduce(a, b, c)"
a = "from functools import reduce\nreduce(a, b, c)"
self.check(b, a)
def test_bug_7253(self):
# fix_tuple_params was being bad and orphaning nodes in the tree.
b = "def x(arg): reduce(sum, [])"
a = "from functools import reduce\ndef x(arg): reduce(sum, [])"
self.check(b, a)
def test_call_with_lambda(self):
b = "reduce(lambda x, y: x + y, seq)"
a = "from functools import reduce\nreduce(lambda x, y: x + y, seq)"
self.check(b, a)
def test_unchanged(self):
s = "reduce(a)"
self.unchanged(s)
s = "reduce(a, b=42)"
self.unchanged(s)
s = "reduce(a, b, c, d)"
self.unchanged(s)
s = "reduce(**c)"
self.unchanged(s)
s = "reduce()"
self.unchanged(s)
class Test_print(FixerTestCase):
fixer = "print"
def test_prefix_preservation(self):
b = """print 1, 1+1, 1+1+1"""
a = """print(1, 1+1, 1+1+1)"""
self.check(b, a)
def test_idempotency(self):
s = """print()"""
self.unchanged(s)
s = """print('')"""
self.unchanged(s)
def test_idempotency_print_as_function(self):
self.refactor.driver.grammar = pygram.python_grammar_no_print_statement
s = """print(1, 1+1, 1+1+1)"""
self.unchanged(s)
s = """print()"""
self.unchanged(s)
s = """print('')"""
self.unchanged(s)
def test_1(self):
b = """print 1, 1+1, 1+1+1"""
a = """print(1, 1+1, 1+1+1)"""
self.check(b, a)
def test_2(self):
b = """print 1, 2"""
a = """print(1, 2)"""
self.check(b, a)
def test_3(self):
b = """print"""
a = """print()"""
self.check(b, a)
def test_4(self):
# from bug 3000
b = """print whatever; print"""
a = """print(whatever); print()"""
self.check(b, a)
def test_5(self):
b = """print; print whatever;"""
a = """print(); print(whatever);"""
self.check(b, a)
def test_tuple(self):
b = """print (a, b, c)"""
a = """print((a, b, c))"""
self.check(b, a)
# trailing commas
def test_trailing_comma_1(self):
b = """print 1, 2, 3,"""
a = """print(1, 2, 3, end=' ')"""
self.check(b, a)
def test_trailing_comma_2(self):
b = """print 1, 2,"""
a = """print(1, 2, end=' ')"""
self.check(b, a)
def test_trailing_comma_3(self):
b = """print 1,"""
a = """print(1, end=' ')"""
self.check(b, a)
# >> stuff
def test_vargs_without_trailing_comma(self):
b = """print >>sys.stderr, 1, 2, 3"""
a = """print(1, 2, 3, file=sys.stderr)"""
self.check(b, a)
def test_with_trailing_comma(self):
b = """print >>sys.stderr, 1, 2,"""
a = """print(1, 2, end=' ', file=sys.stderr)"""
self.check(b, a)
def test_no_trailing_comma(self):
b = """print >>sys.stderr, 1+1"""
a = """print(1+1, file=sys.stderr)"""
self.check(b, a)
def test_spaces_before_file(self):
b = """print >> sys.stderr"""
a = """print(file=sys.stderr)"""
self.check(b, a)
def test_with_future_print_function(self):
s = "from __future__ import print_function\n" \
"print('Hai!', end=' ')"
self.unchanged(s)
b = "print 'Hello, world!'"
a = "print('Hello, world!')"
self.check(b, a)
class Test_exec(FixerTestCase):
fixer = "exec"
def test_prefix_preservation(self):
b = """ exec code in ns1, ns2"""
a = """ exec(code, ns1, ns2)"""
self.check(b, a)
def test_basic(self):
b = """exec code"""
a = """exec(code)"""
self.check(b, a)
def test_with_globals(self):
b = """exec code in ns"""
a = """exec(code, ns)"""
self.check(b, a)
def test_with_globals_locals(self):
b = """exec code in ns1, ns2"""
a = """exec(code, ns1, ns2)"""
self.check(b, a)
def test_complex_1(self):
b = """exec (a.b()) in ns"""
a = """exec((a.b()), ns)"""
self.check(b, a)
def test_complex_2(self):
b = """exec a.b() + c in ns"""
a = """exec(a.b() + c, ns)"""
self.check(b, a)
# These should not be touched
def test_unchanged_1(self):
s = """exec(code)"""
self.unchanged(s)
def test_unchanged_2(self):
s = """exec (code)"""
self.unchanged(s)
def test_unchanged_3(self):
s = """exec(code, ns)"""
self.unchanged(s)
def test_unchanged_4(self):
s = """exec(code, ns1, ns2)"""
self.unchanged(s)
class Test_repr(FixerTestCase):
fixer = "repr"
def test_prefix_preservation(self):
b = """x = `1 + 2`"""
a = """x = repr(1 + 2)"""
self.check(b, a)
def test_simple_1(self):
b = """x = `1 + 2`"""
a = """x = repr(1 + 2)"""
self.check(b, a)
def test_simple_2(self):
b = """y = `x`"""
a = """y = repr(x)"""
self.check(b, a)
def test_complex(self):
b = """z = `y`.__repr__()"""
a = """z = repr(y).__repr__()"""
self.check(b, a)
def test_tuple(self):
b = """x = `1, 2, 3`"""
a = """x = repr((1, 2, 3))"""
self.check(b, a)
def test_nested(self):
b = """x = `1 + `2``"""
a = """x = repr(1 + repr(2))"""
self.check(b, a)
def test_nested_tuples(self):
b = """x = `1, 2 + `3, 4``"""
a = """x = repr((1, 2 + repr((3, 4))))"""
self.check(b, a)
class Test_except(FixerTestCase):
fixer = "except"
def test_prefix_preservation(self):
b = """
try:
pass
except (RuntimeError, ImportError), e:
pass"""
a = """
try:
pass
except (RuntimeError, ImportError) as e:
pass"""
self.check(b, a)
def test_simple(self):
b = """
try:
pass
except Foo, e:
pass"""
a = """
try:
pass
except Foo as e:
pass"""
self.check(b, a)
def test_simple_no_space_before_target(self):
b = """
try:
pass
except Foo,e:
pass"""
a = """
try:
pass
except Foo as e:
pass"""
self.check(b, a)
def test_tuple_unpack(self):
b = """
def foo():
try:
pass
except Exception, (f, e):
pass
except ImportError, e:
pass"""
a = """
def foo():
try:
pass
except Exception as xxx_todo_changeme:
(f, e) = xxx_todo_changeme.args
pass
except ImportError as e:
pass"""
self.check(b, a)
def test_multi_class(self):
b = """
try:
pass
except (RuntimeError, ImportError), e:
pass"""
a = """
try:
pass
except (RuntimeError, ImportError) as e:
pass"""
self.check(b, a)
def test_list_unpack(self):
b = """
try:
pass
except Exception, [a, b]:
pass"""
a = """
try:
pass
except Exception as xxx_todo_changeme:
[a, b] = xxx_todo_changeme.args
pass"""
self.check(b, a)
def test_weird_target_1(self):
b = """
try:
pass
except Exception, d[5]:
pass"""
a = """
try:
pass
except Exception as xxx_todo_changeme:
d[5] = xxx_todo_changeme
pass"""
self.check(b, a)
def test_weird_target_2(self):
b = """
try:
pass
except Exception, a.foo:
pass"""
a = """
try:
pass
except Exception as xxx_todo_changeme:
a.foo = xxx_todo_changeme
pass"""
self.check(b, a)
def test_weird_target_3(self):
b = """
try:
pass
except Exception, a().foo:
pass"""
a = """
try:
pass
except Exception as xxx_todo_changeme:
a().foo = xxx_todo_changeme
pass"""
self.check(b, a)
def test_bare_except(self):
b = """
try:
pass
except Exception, a:
pass
except:
pass"""
a = """
try:
pass
except Exception as a:
pass
except:
pass"""
self.check(b, a)
def test_bare_except_and_else_finally(self):
b = """
try:
pass
except Exception, a:
pass
except:
pass
else:
pass
finally:
pass"""
a = """
try:
pass
except Exception as a:
pass
except:
pass
else:
pass
finally:
pass"""
self.check(b, a)
def test_multi_fixed_excepts_before_bare_except(self):
b = """
try:
pass
except TypeError, b:
pass
except Exception, a:
pass
except:
pass"""
a = """
try:
pass
except TypeError as b:
pass
except Exception as a:
pass
except:
pass"""
self.check(b, a)
def test_one_line_suites(self):
b = """
try: raise TypeError
except TypeError, e:
pass
"""
a = """
try: raise TypeError
except TypeError as e:
pass
"""
self.check(b, a)
b = """
try:
raise TypeError
except TypeError, e: pass
"""
a = """
try:
raise TypeError
except TypeError as e: pass
"""
self.check(b, a)
b = """
try: raise TypeError
except TypeError, e: pass
"""
a = """
try: raise TypeError
except TypeError as e: pass
"""
self.check(b, a)
b = """
try: raise TypeError
except TypeError, e: pass
else: function()
finally: done()
"""
a = """
try: raise TypeError
except TypeError as e: pass
else: function()
finally: done()
"""
self.check(b, a)
# These should not be touched:
def test_unchanged_1(self):
s = """
try:
pass
except:
pass"""
self.unchanged(s)
def test_unchanged_2(self):
s = """
try:
pass
except Exception:
pass"""
self.unchanged(s)
def test_unchanged_3(self):
s = """
try:
pass
except (Exception, SystemExit):
pass"""
self.unchanged(s)
class Test_raise(FixerTestCase):
fixer = "raise"
def test_basic(self):
b = """raise Exception, 5"""
a = """raise Exception(5)"""
self.check(b, a)
def test_prefix_preservation(self):
b = """raise Exception,5"""
a = """raise Exception(5)"""
self.check(b, a)
b = """raise Exception, 5"""
a = """raise Exception(5)"""
self.check(b, a)
def test_with_comments(self):
b = """raise Exception, 5 # foo"""
a = """raise Exception(5) # foo"""
self.check(b, a)
b = """raise E, (5, 6) % (a, b) # foo"""
a = """raise E((5, 6) % (a, b)) # foo"""
self.check(b, a)
b = """def foo():
raise Exception, 5, 6 # foo"""
a = """def foo():
raise Exception(5).with_traceback(6) # foo"""
self.check(b, a)
def test_None_value(self):
b = """raise Exception(5), None, tb"""
a = """raise Exception(5).with_traceback(tb)"""
self.check(b, a)
def test_tuple_value(self):
b = """raise Exception, (5, 6, 7)"""
a = """raise Exception(5, 6, 7)"""
self.check(b, a)
def test_tuple_detection(self):
b = """raise E, (5, 6) % (a, b)"""
a = """raise E((5, 6) % (a, b))"""
self.check(b, a)
def test_tuple_exc_1(self):
b = """raise (((E1, E2), E3), E4), V"""
a = """raise E1(V)"""
self.check(b, a)
def test_tuple_exc_2(self):
b = """raise (E1, (E2, E3), E4), V"""
a = """raise E1(V)"""
self.check(b, a)
# These should produce a warning
def test_string_exc(self):
s = """raise 'foo'"""
self.warns_unchanged(s, "Python 3 does not support string exceptions")
def test_string_exc_val(self):
s = """raise "foo", 5"""
self.warns_unchanged(s, "Python 3 does not support string exceptions")
def test_string_exc_val_tb(self):
s = """raise "foo", 5, 6"""
self.warns_unchanged(s, "Python 3 does not support string exceptions")
# These should result in traceback-assignment
def test_tb_1(self):
b = """def foo():
raise Exception, 5, 6"""
a = """def foo():
raise Exception(5).with_traceback(6)"""
self.check(b, a)
def test_tb_2(self):
b = """def foo():
a = 5
raise Exception, 5, 6
b = 6"""
a = """def foo():
a = 5
raise Exception(5).with_traceback(6)
b = 6"""
self.check(b, a)
def test_tb_3(self):
b = """def foo():
raise Exception,5,6"""
a = """def foo():
raise Exception(5).with_traceback(6)"""
self.check(b, a)
def test_tb_4(self):
b = """def foo():
a = 5
raise Exception,5,6
b = 6"""
a = """def foo():
a = 5
raise Exception(5).with_traceback(6)
b = 6"""
self.check(b, a)
def test_tb_5(self):
b = """def foo():
raise Exception, (5, 6, 7), 6"""
a = """def foo():
raise Exception(5, 6, 7).with_traceback(6)"""
self.check(b, a)
def test_tb_6(self):
b = """def foo():
a = 5
raise Exception, (5, 6, 7), 6
b = 6"""
a = """def foo():
a = 5
raise Exception(5, 6, 7).with_traceback(6)
b = 6"""
self.check(b, a)
class Test_throw(FixerTestCase):
fixer = "throw"
def test_1(self):
b = """g.throw(Exception, 5)"""
a = """g.throw(Exception(5))"""
self.check(b, a)
def test_2(self):
b = """g.throw(Exception,5)"""
a = """g.throw(Exception(5))"""
self.check(b, a)
def test_3(self):
b = """g.throw(Exception, (5, 6, 7))"""
a = """g.throw(Exception(5, 6, 7))"""
self.check(b, a)
def test_4(self):
b = """5 + g.throw(Exception, 5)"""
a = """5 + g.throw(Exception(5))"""
self.check(b, a)
# These should produce warnings
def test_warn_1(self):
s = """g.throw("foo")"""
self.warns_unchanged(s, "Python 3 does not support string exceptions")
def test_warn_2(self):
s = """g.throw("foo", 5)"""
self.warns_unchanged(s, "Python 3 does not support string exceptions")
def test_warn_3(self):
s = """g.throw("foo", 5, 6)"""
self.warns_unchanged(s, "Python 3 does not support string exceptions")
# These should not be touched
def test_untouched_1(self):
s = """g.throw(Exception)"""
self.unchanged(s)
def test_untouched_2(self):
s = """g.throw(Exception(5, 6))"""
self.unchanged(s)
def test_untouched_3(self):
s = """5 + g.throw(Exception(5, 6))"""
self.unchanged(s)
# These should result in traceback-assignment
def test_tb_1(self):
b = """def foo():
g.throw(Exception, 5, 6)"""
a = """def foo():
g.throw(Exception(5).with_traceback(6))"""
self.check(b, a)
def test_tb_2(self):
b = """def foo():
a = 5
g.throw(Exception, 5, 6)
b = 6"""
a = """def foo():
a = 5
g.throw(Exception(5).with_traceback(6))
b = 6"""
self.check(b, a)
def test_tb_3(self):
b = """def foo():
g.throw(Exception,5,6)"""
a = """def foo():
g.throw(Exception(5).with_traceback(6))"""
self.check(b, a)
def test_tb_4(self):
b = """def foo():
a = 5
g.throw(Exception,5,6)
b = 6"""
a = """def foo():
a = 5
g.throw(Exception(5).with_traceback(6))
b = 6"""
self.check(b, a)
def test_tb_5(self):
b = """def foo():
g.throw(Exception, (5, 6, 7), 6)"""
a = """def foo():
g.throw(Exception(5, 6, 7).with_traceback(6))"""
self.check(b, a)
def test_tb_6(self):
b = """def foo():
a = 5
g.throw(Exception, (5, 6, 7), 6)
b = 6"""
a = """def foo():
a = 5
g.throw(Exception(5, 6, 7).with_traceback(6))
b = 6"""
self.check(b, a)
def test_tb_7(self):
b = """def foo():
a + g.throw(Exception, 5, 6)"""
a = """def foo():
a + g.throw(Exception(5).with_traceback(6))"""
self.check(b, a)
def test_tb_8(self):
b = """def foo():
a = 5
a + g.throw(Exception, 5, 6)
b = 6"""
a = """def foo():
a = 5
a + g.throw(Exception(5).with_traceback(6))
b = 6"""
self.check(b, a)
class Test_long(FixerTestCase):
fixer = "long"
def test_1(self):
b = """x = long(x)"""
a = """x = int(x)"""
self.check(b, a)
def test_2(self):
b = """y = isinstance(x, long)"""
a = """y = isinstance(x, int)"""
self.check(b, a)
def test_3(self):
b = """z = type(x) in (int, long)"""
a = """z = type(x) in (int, int)"""
self.check(b, a)
def test_unchanged(self):
s = """long = True"""
self.unchanged(s)
s = """s.long = True"""
self.unchanged(s)
s = """def long(): pass"""
self.unchanged(s)
s = """class long(): pass"""
self.unchanged(s)
s = """def f(long): pass"""
self.unchanged(s)
s = """def f(g, long): pass"""
self.unchanged(s)
s = """def f(x, long=True): pass"""
self.unchanged(s)
def test_prefix_preservation(self):
b = """x = long( x )"""
a = """x = int( x )"""
self.check(b, a)
class Test_execfile(FixerTestCase):
fixer = "execfile"
def test_conversion(self):
b = """execfile("fn")"""
a = """exec(compile(open("fn").read(), "fn", 'exec'))"""
self.check(b, a)
b = """execfile("fn", glob)"""
a = """exec(compile(open("fn").read(), "fn", 'exec'), glob)"""
self.check(b, a)
b = """execfile("fn", glob, loc)"""
a = """exec(compile(open("fn").read(), "fn", 'exec'), glob, loc)"""
self.check(b, a)
b = """execfile("fn", globals=glob)"""
a = """exec(compile(open("fn").read(), "fn", 'exec'), globals=glob)"""
self.check(b, a)
b = """execfile("fn", locals=loc)"""
a = """exec(compile(open("fn").read(), "fn", 'exec'), locals=loc)"""
self.check(b, a)
b = """execfile("fn", globals=glob, locals=loc)"""
a = """exec(compile(open("fn").read(), "fn", 'exec'), globals=glob, locals=loc)"""
self.check(b, a)
def test_spacing(self):
b = """execfile( "fn" )"""
a = """exec(compile(open( "fn" ).read(), "fn", 'exec'))"""
self.check(b, a)
b = """execfile("fn", globals = glob)"""
a = """exec(compile(open("fn").read(), "fn", 'exec'), globals = glob)"""
self.check(b, a)
class Test_isinstance(FixerTestCase):
fixer = "isinstance"
def test_remove_multiple_items(self):
b = """isinstance(x, (int, int, int))"""
a = """isinstance(x, int)"""
self.check(b, a)
b = """isinstance(x, (int, float, int, int, float))"""
a = """isinstance(x, (int, float))"""
self.check(b, a)
b = """isinstance(x, (int, float, int, int, float, str))"""
a = """isinstance(x, (int, float, str))"""
self.check(b, a)
b = """isinstance(foo() + bar(), (x(), y(), x(), int, int))"""
a = """isinstance(foo() + bar(), (x(), y(), x(), int))"""
self.check(b, a)
def test_prefix_preservation(self):
b = """if isinstance( foo(), ( bar, bar, baz )) : pass"""
a = """if isinstance( foo(), ( bar, baz )) : pass"""
self.check(b, a)
def test_unchanged(self):
self.unchanged("isinstance(x, (str, int))")
class Test_dict(FixerTestCase):
fixer = "dict"
def test_prefix_preservation(self):
b = "if d. keys ( ) : pass"
a = "if list(d. keys ( )) : pass"
self.check(b, a)
b = "if d. items ( ) : pass"
a = "if list(d. items ( )) : pass"
self.check(b, a)
b = "if d. iterkeys ( ) : pass"
a = "if iter(d. keys ( )) : pass"
self.check(b, a)
b = "[i for i in d. iterkeys( ) ]"
a = "[i for i in d. keys( ) ]"
self.check(b, a)
b = "if d. viewkeys ( ) : pass"
a = "if d. keys ( ) : pass"
self.check(b, a)
b = "[i for i in d. viewkeys( ) ]"
a = "[i for i in d. keys( ) ]"
self.check(b, a)
def test_trailing_comment(self):
b = "d.keys() # foo"
a = "list(d.keys()) # foo"
self.check(b, a)
b = "d.items() # foo"
a = "list(d.items()) # foo"
self.check(b, a)
b = "d.iterkeys() # foo"
a = "iter(d.keys()) # foo"
self.check(b, a)
b = """[i for i in d.iterkeys() # foo
]"""
a = """[i for i in d.keys() # foo
]"""
self.check(b, a)
b = """[i for i in d.iterkeys() # foo
]"""
a = """[i for i in d.keys() # foo
]"""
self.check(b, a)
b = "d.viewitems() # foo"
a = "d.items() # foo"
self.check(b, a)
def test_unchanged(self):
for wrapper in fixer_util.consuming_calls:
s = "s = %s(d.keys())" % wrapper
self.unchanged(s)
s = "s = %s(d.values())" % wrapper
self.unchanged(s)
s = "s = %s(d.items())" % wrapper
self.unchanged(s)
def test_01(self):
b = "d.keys()"
a = "list(d.keys())"
self.check(b, a)
b = "a[0].foo().keys()"
a = "list(a[0].foo().keys())"
self.check(b, a)
def test_02(self):
b = "d.items()"
a = "list(d.items())"
self.check(b, a)
def test_03(self):
b = "d.values()"
a = "list(d.values())"
self.check(b, a)
def test_04(self):
b = "d.iterkeys()"
a = "iter(d.keys())"
self.check(b, a)
def test_05(self):
b = "d.iteritems()"
a = "iter(d.items())"
self.check(b, a)
def test_06(self):
b = "d.itervalues()"
a = "iter(d.values())"
self.check(b, a)
def test_07(self):
s = "list(d.keys())"
self.unchanged(s)
def test_08(self):
s = "sorted(d.keys())"
self.unchanged(s)
def test_09(self):
b = "iter(d.keys())"
a = "iter(list(d.keys()))"
self.check(b, a)
def test_10(self):
b = "foo(d.keys())"
a = "foo(list(d.keys()))"
self.check(b, a)
def test_11(self):
b = "for i in d.keys(): print i"
a = "for i in list(d.keys()): print i"
self.check(b, a)
def test_12(self):
b = "for i in d.iterkeys(): print i"
a = "for i in d.keys(): print i"
self.check(b, a)
def test_13(self):
b = "[i for i in d.keys()]"
a = "[i for i in list(d.keys())]"
self.check(b, a)
def test_14(self):
b = "[i for i in d.iterkeys()]"
a = "[i for i in d.keys()]"
self.check(b, a)
def test_15(self):
b = "(i for i in d.keys())"
a = "(i for i in list(d.keys()))"
self.check(b, a)
def test_16(self):
b = "(i for i in d.iterkeys())"
a = "(i for i in d.keys())"
self.check(b, a)
def test_17(self):
b = "iter(d.iterkeys())"
a = "iter(d.keys())"
self.check(b, a)
def test_18(self):
b = "list(d.iterkeys())"
a = "list(d.keys())"
self.check(b, a)
def test_19(self):
b = "sorted(d.iterkeys())"
a = "sorted(d.keys())"
self.check(b, a)
def test_20(self):
b = "foo(d.iterkeys())"
a = "foo(iter(d.keys()))"
self.check(b, a)
def test_21(self):
b = "print h.iterkeys().next()"
a = "print iter(h.keys()).next()"
self.check(b, a)
def test_22(self):
b = "print h.keys()[0]"
a = "print list(h.keys())[0]"
self.check(b, a)
def test_23(self):
b = "print list(h.iterkeys().next())"
a = "print list(iter(h.keys()).next())"
self.check(b, a)
def test_24(self):
b = "for x in h.keys()[0]: print x"
a = "for x in list(h.keys())[0]: print x"
self.check(b, a)
def test_25(self):
b = "d.viewkeys()"
a = "d.keys()"
self.check(b, a)
def test_26(self):
b = "d.viewitems()"
a = "d.items()"
self.check(b, a)
def test_27(self):
b = "d.viewvalues()"
a = "d.values()"
self.check(b, a)
def test_28(self):
b = "[i for i in d.viewkeys()]"
a = "[i for i in d.keys()]"
self.check(b, a)
def test_29(self):
b = "(i for i in d.viewkeys())"
a = "(i for i in d.keys())"
self.check(b, a)
def test_30(self):
b = "iter(d.viewkeys())"
a = "iter(d.keys())"
self.check(b, a)
def test_31(self):
b = "list(d.viewkeys())"
a = "list(d.keys())"
self.check(b, a)
def test_32(self):
b = "sorted(d.viewkeys())"
a = "sorted(d.keys())"
self.check(b, a)
class Test_xrange(FixerTestCase):
fixer = "xrange"
def test_prefix_preservation(self):
b = """x = xrange( 10 )"""
a = """x = range( 10 )"""
self.check(b, a)
b = """x = xrange( 1 , 10 )"""
a = """x = range( 1 , 10 )"""
self.check(b, a)
b = """x = xrange( 0 , 10 , 2 )"""
a = """x = range( 0 , 10 , 2 )"""
self.check(b, a)
def test_single_arg(self):
b = """x = xrange(10)"""
a = """x = range(10)"""
self.check(b, a)
def test_two_args(self):
b = """x = xrange(1, 10)"""
a = """x = range(1, 10)"""
self.check(b, a)
def test_three_args(self):
b = """x = xrange(0, 10, 2)"""
a = """x = range(0, 10, 2)"""
self.check(b, a)
def test_wrap_in_list(self):
b = """x = range(10, 3, 9)"""
a = """x = list(range(10, 3, 9))"""
self.check(b, a)
b = """x = foo(range(10, 3, 9))"""
a = """x = foo(list(range(10, 3, 9)))"""
self.check(b, a)
b = """x = range(10, 3, 9) + [4]"""
a = """x = list(range(10, 3, 9)) + [4]"""
self.check(b, a)
b = """x = range(10)[::-1]"""
a = """x = list(range(10))[::-1]"""
self.check(b, a)
b = """x = range(10) [3]"""
a = """x = list(range(10)) [3]"""
self.check(b, a)
def test_xrange_in_for(self):
b = """for i in xrange(10):\n j=i"""
a = """for i in range(10):\n j=i"""
self.check(b, a)
b = """[i for i in xrange(10)]"""
a = """[i for i in range(10)]"""
self.check(b, a)
def test_range_in_for(self):
self.unchanged("for i in range(10): pass")
self.unchanged("[i for i in range(10)]")
def test_in_contains_test(self):
self.unchanged("x in range(10, 3, 9)")
def test_in_consuming_context(self):
for call in fixer_util.consuming_calls:
self.unchanged("a = %s(range(10))" % call)
class Test_xrange_with_reduce(FixerTestCase):
def setUp(self):
super(Test_xrange_with_reduce, self).setUp(["xrange", "reduce"])
def test_double_transform(self):
b = """reduce(x, xrange(5))"""
a = """from functools import reduce
reduce(x, range(5))"""
self.check(b, a)
class Test_raw_input(FixerTestCase):
fixer = "raw_input"
def test_prefix_preservation(self):
b = """x = raw_input( )"""
a = """x = input( )"""
self.check(b, a)
b = """x = raw_input( '' )"""
a = """x = input( '' )"""
self.check(b, a)
def test_1(self):
b = """x = raw_input()"""
a = """x = input()"""
self.check(b, a)
def test_2(self):
b = """x = raw_input('')"""
a = """x = input('')"""
self.check(b, a)
def test_3(self):
b = """x = raw_input('prompt')"""
a = """x = input('prompt')"""
self.check(b, a)
def test_4(self):
b = """x = raw_input(foo(a) + 6)"""
a = """x = input(foo(a) + 6)"""
self.check(b, a)
def test_5(self):
b = """x = raw_input(invite).split()"""
a = """x = input(invite).split()"""
self.check(b, a)
def test_6(self):
b = """x = raw_input(invite) . split ()"""
a = """x = input(invite) . split ()"""
self.check(b, a)
def test_8(self):
b = "x = int(raw_input())"
a = "x = int(input())"
self.check(b, a)
class Test_funcattrs(FixerTestCase):
fixer = "funcattrs"
attrs = ["closure", "doc", "name", "defaults", "code", "globals", "dict"]
def test(self):
for attr in self.attrs:
b = "a.func_%s" % attr
a = "a.__%s__" % attr
self.check(b, a)
b = "self.foo.func_%s.foo_bar" % attr
a = "self.foo.__%s__.foo_bar" % attr
self.check(b, a)
def test_unchanged(self):
for attr in self.attrs:
s = "foo(func_%s + 5)" % attr
self.unchanged(s)
s = "f(foo.__%s__)" % attr
self.unchanged(s)
s = "f(foo.__%s__.foo)" % attr
self.unchanged(s)
class Test_xreadlines(FixerTestCase):
fixer = "xreadlines"
def test_call(self):
b = "for x in f.xreadlines(): pass"
a = "for x in f: pass"
self.check(b, a)
b = "for x in foo().xreadlines(): pass"
a = "for x in foo(): pass"
self.check(b, a)
b = "for x in (5 + foo()).xreadlines(): pass"
a = "for x in (5 + foo()): pass"
self.check(b, a)
def test_attr_ref(self):
b = "foo(f.xreadlines + 5)"
a = "foo(f.__iter__ + 5)"
self.check(b, a)
b = "foo(f().xreadlines + 5)"
a = "foo(f().__iter__ + 5)"
self.check(b, a)
b = "foo((5 + f()).xreadlines + 5)"
a = "foo((5 + f()).__iter__ + 5)"
self.check(b, a)
def test_unchanged(self):
s = "for x in f.xreadlines(5): pass"
self.unchanged(s)
s = "for x in f.xreadlines(k=5): pass"
self.unchanged(s)
s = "for x in f.xreadlines(*k, **v): pass"
self.unchanged(s)
s = "foo(xreadlines)"
self.unchanged(s)
class ImportsFixerTests:
def test_import_module(self):
for old, new in self.modules.items():
b = "import %s" % old
a = "import %s" % new
self.check(b, a)
b = "import foo, %s, bar" % old
a = "import foo, %s, bar" % new
self.check(b, a)
def test_import_from(self):
for old, new in self.modules.items():
b = "from %s import foo" % old
a = "from %s import foo" % new
self.check(b, a)
b = "from %s import foo, bar" % old
a = "from %s import foo, bar" % new
self.check(b, a)
b = "from %s import (yes, no)" % old
a = "from %s import (yes, no)" % new
self.check(b, a)
def test_import_module_as(self):
for old, new in self.modules.items():
b = "import %s as foo_bar" % old
a = "import %s as foo_bar" % new
self.check(b, a)
b = "import %s as foo_bar" % old
a = "import %s as foo_bar" % new
self.check(b, a)
def test_import_from_as(self):
for old, new in self.modules.items():
b = "from %s import foo as bar" % old
a = "from %s import foo as bar" % new
self.check(b, a)
def test_star(self):
for old, new in self.modules.items():
b = "from %s import *" % old
a = "from %s import *" % new
self.check(b, a)
def test_import_module_usage(self):
for old, new in self.modules.items():
b = """
import %s
foo(%s.bar)
""" % (old, old)
a = """
import %s
foo(%s.bar)
""" % (new, new)
self.check(b, a)
b = """
from %s import x
%s = 23
""" % (old, old)
a = """
from %s import x
%s = 23
""" % (new, old)
self.check(b, a)
s = """
def f():
%s.method()
""" % (old,)
self.unchanged(s)
# test nested usage
b = """
import %s
%s.bar(%s.foo)
""" % (old, old, old)
a = """
import %s
%s.bar(%s.foo)
""" % (new, new, new)
self.check(b, a)
b = """
import %s
x.%s
""" % (old, old)
a = """
import %s
x.%s
""" % (new, old)
self.check(b, a)
class Test_imports(FixerTestCase, ImportsFixerTests):
fixer = "imports"
from ..fixes.fix_imports import MAPPING as modules
def test_multiple_imports(self):
b = """import urlparse, cStringIO"""
a = """import urllib.parse, io"""
self.check(b, a)
def test_multiple_imports_as(self):
b = """
import copy_reg as bar, HTMLParser as foo, urlparse
s = urlparse.spam(bar.foo())
"""
a = """
import copyreg as bar, html.parser as foo, urllib.parse
s = urllib.parse.spam(bar.foo())
"""
self.check(b, a)
class Test_imports2(FixerTestCase, ImportsFixerTests):
fixer = "imports2"
from ..fixes.fix_imports2 import MAPPING as modules
class Test_imports_fixer_order(FixerTestCase, ImportsFixerTests):
def setUp(self):
super(Test_imports_fixer_order, self).setUp(['imports', 'imports2'])
from ..fixes.fix_imports2 import MAPPING as mapping2
self.modules = mapping2.copy()
from ..fixes.fix_imports import MAPPING as mapping1
for key in ('dbhash', 'dumbdbm', 'dbm', 'gdbm'):
self.modules[key] = mapping1[key]
def test_after_local_imports_refactoring(self):
for fix in ("imports", "imports2"):
self.fixer = fix
self.assert_runs_after("import")
class Test_urllib(FixerTestCase):
fixer = "urllib"
from ..fixes.fix_urllib import MAPPING as modules
def test_import_module(self):
for old, changes in self.modules.items():
b = "import %s" % old
a = "import %s" % ", ".join(map(itemgetter(0), changes))
self.check(b, a)
def test_import_from(self):
for old, changes in self.modules.items():
all_members = []
for new, members in changes:
for member in members:
all_members.append(member)
b = "from %s import %s" % (old, member)
a = "from %s import %s" % (new, member)
self.check(b, a)
s = "from foo import %s" % member
self.unchanged(s)
b = "from %s import %s" % (old, ", ".join(members))
a = "from %s import %s" % (new, ", ".join(members))
self.check(b, a)
s = "from foo import %s" % ", ".join(members)
self.unchanged(s)
# test the breaking of a module into multiple replacements
b = "from %s import %s" % (old, ", ".join(all_members))
a = "\n".join(["from %s import %s" % (new, ", ".join(members))
for (new, members) in changes])
self.check(b, a)
def test_import_module_as(self):
for old in self.modules:
s = "import %s as foo" % old
self.warns_unchanged(s, "This module is now multiple modules")
def test_import_from_as(self):
for old, changes in self.modules.items():
for new, members in changes:
for member in members:
b = "from %s import %s as foo_bar" % (old, member)
a = "from %s import %s as foo_bar" % (new, member)
self.check(b, a)
b = "from %s import %s as blah, %s" % (old, member, member)
a = "from %s import %s as blah, %s" % (new, member, member)
self.check(b, a)
def test_star(self):
for old in self.modules:
s = "from %s import *" % old
self.warns_unchanged(s, "Cannot handle star imports")
def test_indented(self):
b = """
def foo():
from urllib import urlencode, urlopen
"""
a = """
def foo():
from urllib.parse import urlencode
from urllib.request import urlopen
"""
self.check(b, a)
b = """
def foo():
other()
from urllib import urlencode, urlopen
"""
a = """
def foo():
other()
from urllib.parse import urlencode
from urllib.request import urlopen
"""
self.check(b, a)
def test_import_module_usage(self):
for old, changes in self.modules.items():
for new, members in changes:
for member in members:
new_import = ", ".join([n for (n, mems)
in self.modules[old]])
b = """
import %s
foo(%s.%s)
""" % (old, old, member)
a = """
import %s
foo(%s.%s)
""" % (new_import, new, member)
self.check(b, a)
b = """
import %s
%s.%s(%s.%s)
""" % (old, old, member, old, member)
a = """
import %s
%s.%s(%s.%s)
""" % (new_import, new, member, new, member)
self.check(b, a)
class Test_input(FixerTestCase):
fixer = "input"
def test_prefix_preservation(self):
b = """x = input( )"""
a = """x = eval(input( ))"""
self.check(b, a)
b = """x = input( '' )"""
a = """x = eval(input( '' ))"""
self.check(b, a)
def test_trailing_comment(self):
b = """x = input() # foo"""
a = """x = eval(input()) # foo"""
self.check(b, a)
def test_idempotency(self):
s = """x = eval(input())"""
self.unchanged(s)
s = """x = eval(input(''))"""
self.unchanged(s)
s = """x = eval(input(foo(5) + 9))"""
self.unchanged(s)
def test_1(self):
b = """x = input()"""
a = """x = eval(input())"""
self.check(b, a)
def test_2(self):
b = """x = input('')"""
a = """x = eval(input(''))"""
self.check(b, a)
def test_3(self):
b = """x = input('prompt')"""
a = """x = eval(input('prompt'))"""
self.check(b, a)
def test_4(self):
b = """x = input(foo(5) + 9)"""
a = """x = eval(input(foo(5) + 9))"""
self.check(b, a)
class Test_tuple_params(FixerTestCase):
fixer = "tuple_params"
def test_unchanged_1(self):
s = """def foo(): pass"""
self.unchanged(s)
def test_unchanged_2(self):
s = """def foo(a, b, c): pass"""
self.unchanged(s)
def test_unchanged_3(self):
s = """def foo(a=3, b=4, c=5): pass"""
self.unchanged(s)
def test_1(self):
b = """
def foo(((a, b), c)):
x = 5"""
a = """
def foo(xxx_todo_changeme):
((a, b), c) = xxx_todo_changeme
x = 5"""
self.check(b, a)
def test_2(self):
b = """
def foo(((a, b), c), d):
x = 5"""
a = """
def foo(xxx_todo_changeme, d):
((a, b), c) = xxx_todo_changeme
x = 5"""
self.check(b, a)
def test_3(self):
b = """
def foo(((a, b), c), d) -> e:
x = 5"""
a = """
def foo(xxx_todo_changeme, d) -> e:
((a, b), c) = xxx_todo_changeme
x = 5"""
self.check(b, a)
def test_semicolon(self):
b = """
def foo(((a, b), c)): x = 5; y = 7"""
a = """
def foo(xxx_todo_changeme): ((a, b), c) = xxx_todo_changeme; x = 5; y = 7"""
self.check(b, a)
def test_keywords(self):
b = """
def foo(((a, b), c), d, e=5) -> z:
x = 5"""
a = """
def foo(xxx_todo_changeme, d, e=5) -> z:
((a, b), c) = xxx_todo_changeme
x = 5"""
self.check(b, a)
def test_varargs(self):
b = """
def foo(((a, b), c), d, *vargs, **kwargs) -> z:
x = 5"""
a = """
def foo(xxx_todo_changeme, d, *vargs, **kwargs) -> z:
((a, b), c) = xxx_todo_changeme
x = 5"""
self.check(b, a)
def test_multi_1(self):
b = """
def foo(((a, b), c), (d, e, f)) -> z:
x = 5"""
a = """
def foo(xxx_todo_changeme, xxx_todo_changeme1) -> z:
((a, b), c) = xxx_todo_changeme
(d, e, f) = xxx_todo_changeme1
x = 5"""
self.check(b, a)
def test_multi_2(self):
b = """
def foo(x, ((a, b), c), d, (e, f, g), y) -> z:
x = 5"""
a = """
def foo(x, xxx_todo_changeme, d, xxx_todo_changeme1, y) -> z:
((a, b), c) = xxx_todo_changeme
(e, f, g) = xxx_todo_changeme1
x = 5"""
self.check(b, a)
def test_docstring(self):
b = """
def foo(((a, b), c), (d, e, f)) -> z:
"foo foo foo foo"
x = 5"""
a = """
def foo(xxx_todo_changeme, xxx_todo_changeme1) -> z:
"foo foo foo foo"
((a, b), c) = xxx_todo_changeme
(d, e, f) = xxx_todo_changeme1
x = 5"""
self.check(b, a)
def test_lambda_no_change(self):
s = """lambda x: x + 5"""
self.unchanged(s)
def test_lambda_parens_single_arg(self):
b = """lambda (x): x + 5"""
a = """lambda x: x + 5"""
self.check(b, a)
b = """lambda(x): x + 5"""
a = """lambda x: x + 5"""
self.check(b, a)
b = """lambda ((((x)))): x + 5"""
a = """lambda x: x + 5"""
self.check(b, a)
b = """lambda((((x)))): x + 5"""
a = """lambda x: x + 5"""
self.check(b, a)
def test_lambda_simple(self):
b = """lambda (x, y): x + f(y)"""
a = """lambda x_y: x_y[0] + f(x_y[1])"""
self.check(b, a)
b = """lambda(x, y): x + f(y)"""
a = """lambda x_y: x_y[0] + f(x_y[1])"""
self.check(b, a)
b = """lambda (((x, y))): x + f(y)"""
a = """lambda x_y: x_y[0] + f(x_y[1])"""
self.check(b, a)
b = """lambda(((x, y))): x + f(y)"""
a = """lambda x_y: x_y[0] + f(x_y[1])"""
self.check(b, a)
def test_lambda_one_tuple(self):
b = """lambda (x,): x + f(x)"""
a = """lambda x1: x1[0] + f(x1[0])"""
self.check(b, a)
b = """lambda (((x,))): x + f(x)"""
a = """lambda x1: x1[0] + f(x1[0])"""
self.check(b, a)
def test_lambda_simple_multi_use(self):
b = """lambda (x, y): x + x + f(x) + x"""
a = """lambda x_y: x_y[0] + x_y[0] + f(x_y[0]) + x_y[0]"""
self.check(b, a)
def test_lambda_simple_reverse(self):
b = """lambda (x, y): y + x"""
a = """lambda x_y: x_y[1] + x_y[0]"""
self.check(b, a)
def test_lambda_nested(self):
b = """lambda (x, (y, z)): x + y + z"""
a = """lambda x_y_z: x_y_z[0] + x_y_z[1][0] + x_y_z[1][1]"""
self.check(b, a)
b = """lambda (((x, (y, z)))): x + y + z"""
a = """lambda x_y_z: x_y_z[0] + x_y_z[1][0] + x_y_z[1][1]"""
self.check(b, a)
def test_lambda_nested_multi_use(self):
b = """lambda (x, (y, z)): x + y + f(y)"""
a = """lambda x_y_z: x_y_z[0] + x_y_z[1][0] + f(x_y_z[1][0])"""
self.check(b, a)
class Test_methodattrs(FixerTestCase):
fixer = "methodattrs"
attrs = ["func", "self", "class"]
def test(self):
for attr in self.attrs:
b = "a.im_%s" % attr
if attr == "class":
a = "a.__self__.__class__"
else:
a = "a.__%s__" % attr
self.check(b, a)
b = "self.foo.im_%s.foo_bar" % attr
if attr == "class":
a = "self.foo.__self__.__class__.foo_bar"
else:
a = "self.foo.__%s__.foo_bar" % attr
self.check(b, a)
def test_unchanged(self):
for attr in self.attrs:
s = "foo(im_%s + 5)" % attr
self.unchanged(s)
s = "f(foo.__%s__)" % attr
self.unchanged(s)
s = "f(foo.__%s__.foo)" % attr
self.unchanged(s)
class Test_next(FixerTestCase):
fixer = "next"
def test_1(self):
b = """it.next()"""
a = """next(it)"""
self.check(b, a)
def test_2(self):
b = """a.b.c.d.next()"""
a = """next(a.b.c.d)"""
self.check(b, a)
def test_3(self):
b = """(a + b).next()"""
a = """next((a + b))"""
self.check(b, a)
def test_4(self):
b = """a().next()"""
a = """next(a())"""
self.check(b, a)
def test_5(self):
b = """a().next() + b"""
a = """next(a()) + b"""
self.check(b, a)
def test_6(self):
b = """c( a().next() + b)"""
a = """c( next(a()) + b)"""
self.check(b, a)
def test_prefix_preservation_1(self):
b = """
for a in b:
foo(a)
a.next()
"""
a = """
for a in b:
foo(a)
next(a)
"""
self.check(b, a)
def test_prefix_preservation_2(self):
b = """
for a in b:
foo(a) # abc
# def
a.next()
"""
a = """
for a in b:
foo(a) # abc
# def
next(a)
"""
self.check(b, a)
def test_prefix_preservation_3(self):
b = """
next = 5
for a in b:
foo(a)
a.next()
"""
a = """
next = 5
for a in b:
foo(a)
a.__next__()
"""
self.check(b, a, ignore_warnings=True)
def test_prefix_preservation_4(self):
b = """
next = 5
for a in b:
foo(a) # abc
# def
a.next()
"""
a = """
next = 5
for a in b:
foo(a) # abc
# def
a.__next__()
"""
self.check(b, a, ignore_warnings=True)
def test_prefix_preservation_5(self):
b = """
next = 5
for a in b:
foo(foo(a), # abc
a.next())
"""
a = """
next = 5
for a in b:
foo(foo(a), # abc
a.__next__())
"""
self.check(b, a, ignore_warnings=True)
def test_prefix_preservation_6(self):
b = """
for a in b:
foo(foo(a), # abc
a.next())
"""
a = """
for a in b:
foo(foo(a), # abc
next(a))
"""
self.check(b, a)
def test_method_1(self):
b = """
class A:
def next(self):
pass
"""
a = """
class A:
def __next__(self):
pass
"""
self.check(b, a)
def test_method_2(self):
b = """
class A(object):
def next(self):
pass
"""
a = """
class A(object):
def __next__(self):
pass
"""
self.check(b, a)
def test_method_3(self):
b = """
class A:
def next(x):
pass
"""
a = """
class A:
def __next__(x):
pass
"""
self.check(b, a)
def test_method_4(self):
b = """
class A:
def __init__(self, foo):
self.foo = foo
def next(self):
pass
def __iter__(self):
return self
"""
a = """
class A:
def __init__(self, foo):
self.foo = foo
def __next__(self):
pass
def __iter__(self):
return self
"""
self.check(b, a)
def test_method_unchanged(self):
s = """
class A:
def next(self, a, b):
pass
"""
self.unchanged(s)
def test_shadowing_assign_simple(self):
s = """
next = foo
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_assign_tuple_1(self):
s = """
(next, a) = foo
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_assign_tuple_2(self):
s = """
(a, (b, (next, c)), a) = foo
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_assign_list_1(self):
s = """
[next, a] = foo
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_assign_list_2(self):
s = """
[a, [b, [next, c]], a] = foo
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_builtin_assign(self):
s = """
def foo():
__builtin__.next = foo
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_builtin_assign_in_tuple(self):
s = """
def foo():
(a, __builtin__.next) = foo
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_builtin_assign_in_list(self):
s = """
def foo():
[a, __builtin__.next] = foo
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_assign_to_next(self):
s = """
def foo():
A.next = foo
class A:
def next(self, a, b):
pass
"""
self.unchanged(s)
def test_assign_to_next_in_tuple(self):
s = """
def foo():
(a, A.next) = foo
class A:
def next(self, a, b):
pass
"""
self.unchanged(s)
def test_assign_to_next_in_list(self):
s = """
def foo():
[a, A.next] = foo
class A:
def next(self, a, b):
pass
"""
self.unchanged(s)
def test_shadowing_import_1(self):
s = """
import foo.bar as next
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_import_2(self):
s = """
import bar, bar.foo as next
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_import_3(self):
s = """
import bar, bar.foo as next, baz
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_import_from_1(self):
s = """
from x import next
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_import_from_2(self):
s = """
from x.a import next
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_import_from_3(self):
s = """
from x import a, next, b
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_import_from_4(self):
s = """
from x.a import a, next, b
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_funcdef_1(self):
s = """
def next(a):
pass
class A:
def next(self, a, b):
pass
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_funcdef_2(self):
b = """
def next(a):
pass
class A:
def next(self):
pass
it.next()
"""
a = """
def next(a):
pass
class A:
def __next__(self):
pass
it.__next__()
"""
self.warns(b, a, "Calls to builtin next() possibly shadowed")
def test_shadowing_global_1(self):
s = """
def f():
global next
next = 5
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_global_2(self):
s = """
def f():
global a, next, b
next = 5
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_for_simple(self):
s = """
for next in it():
pass
b = 5
c = 6
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_for_tuple_1(self):
s = """
for next, b in it():
pass
b = 5
c = 6
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_shadowing_for_tuple_2(self):
s = """
for a, (next, c), b in it():
pass
b = 5
c = 6
"""
self.warns_unchanged(s, "Calls to builtin next() possibly shadowed")
def test_noncall_access_1(self):
b = """gnext = g.next"""
a = """gnext = g.__next__"""
self.check(b, a)
def test_noncall_access_2(self):
b = """f(g.next + 5)"""
a = """f(g.__next__ + 5)"""
self.check(b, a)
def test_noncall_access_3(self):
b = """f(g().next + 5)"""
a = """f(g().__next__ + 5)"""
self.check(b, a)
class Test_nonzero(FixerTestCase):
fixer = "nonzero"
def test_1(self):
b = """
class A:
def __nonzero__(self):
pass
"""
a = """
class A:
def __bool__(self):
pass
"""
self.check(b, a)
def test_2(self):
b = """
class A(object):
def __nonzero__(self):
pass
"""
a = """
class A(object):
def __bool__(self):
pass
"""
self.check(b, a)
def test_unchanged_1(self):
s = """
class A(object):
def __bool__(self):
pass
"""
self.unchanged(s)
def test_unchanged_2(self):
s = """
class A(object):
def __nonzero__(self, a):
pass
"""
self.unchanged(s)
def test_unchanged_func(self):
s = """
def __nonzero__(self):
pass
"""
self.unchanged(s)
class Test_numliterals(FixerTestCase):
fixer = "numliterals"
def test_octal_1(self):
b = """0755"""
a = """0o755"""
self.check(b, a)
def test_long_int_1(self):
b = """a = 12L"""
a = """a = 12"""
self.check(b, a)
def test_long_int_2(self):
b = """a = 12l"""
a = """a = 12"""
self.check(b, a)
def test_long_hex(self):
b = """b = 0x12l"""
a = """b = 0x12"""
self.check(b, a)
def test_comments_and_spacing(self):
b = """b = 0x12L"""
a = """b = 0x12"""
self.check(b, a)
b = """b = 0755 # spam"""
a = """b = 0o755 # spam"""
self.check(b, a)
def test_unchanged_int(self):
s = """5"""
self.unchanged(s)
def test_unchanged_float(self):
s = """5.0"""
self.unchanged(s)
def test_unchanged_octal(self):
s = """0o755"""
self.unchanged(s)
def test_unchanged_hex(self):
s = """0xABC"""
self.unchanged(s)
def test_unchanged_exp(self):
s = """5.0e10"""
self.unchanged(s)
def test_unchanged_complex_int(self):
s = """5 + 4j"""
self.unchanged(s)
def test_unchanged_complex_float(self):
s = """5.4 + 4.9j"""
self.unchanged(s)
def test_unchanged_complex_bare(self):
s = """4j"""
self.unchanged(s)
s = """4.4j"""
self.unchanged(s)
class Test_renames(FixerTestCase):
fixer = "renames"
modules = {"sys": ("maxint", "maxsize"),
}
def test_import_from(self):
for mod, (old, new) in list(self.modules.items()):
b = "from %s import %s" % (mod, old)
a = "from %s import %s" % (mod, new)
self.check(b, a)
s = "from foo import %s" % old
self.unchanged(s)
def test_import_from_as(self):
for mod, (old, new) in list(self.modules.items()):
b = "from %s import %s as foo_bar" % (mod, old)
a = "from %s import %s as foo_bar" % (mod, new)
self.check(b, a)
def test_import_module_usage(self):
for mod, (old, new) in list(self.modules.items()):
b = """
import %s
foo(%s, %s.%s)
""" % (mod, mod, mod, old)
a = """
import %s
foo(%s, %s.%s)
""" % (mod, mod, mod, new)
self.check(b, a)
def XXX_test_from_import_usage(self):
# not implemented yet
for mod, (old, new) in list(self.modules.items()):
b = """
from %s import %s
foo(%s, %s)
""" % (mod, old, mod, old)
a = """
from %s import %s
foo(%s, %s)
""" % (mod, new, mod, new)
self.check(b, a)
class Test_unicode(FixerTestCase):
fixer = "unicode"
def test_whitespace(self):
b = """unicode( x)"""
a = """str( x)"""
self.check(b, a)
b = """ unicode(x )"""
a = """ str(x )"""
self.check(b, a)
b = """ u'h'"""
a = """ 'h'"""
self.check(b, a)
def test_unicode_call(self):
b = """unicode(x, y, z)"""
a = """str(x, y, z)"""
self.check(b, a)
def test_unichr(self):
b = """unichr(u'h')"""
a = """chr('h')"""
self.check(b, a)
def test_unicode_literal_1(self):
b = '''u"x"'''
a = '''"x"'''
self.check(b, a)
def test_unicode_literal_2(self):
b = """ur'x'"""
a = """r'x'"""
self.check(b, a)
def test_unicode_literal_3(self):
b = """UR'''x''' """
a = """R'''x''' """
self.check(b, a)
def test_native_literal_escape_u(self):
b = r"""'\\\u20ac\U0001d121\\u20ac'"""
a = r"""'\\\\u20ac\\U0001d121\\u20ac'"""
self.check(b, a)
b = r"""r'\\\u20ac\U0001d121\\u20ac'"""
a = r"""r'\\\u20ac\U0001d121\\u20ac'"""
self.check(b, a)
def test_bytes_literal_escape_u(self):
b = r"""b'\\\u20ac\U0001d121\\u20ac'"""
a = r"""b'\\\u20ac\U0001d121\\u20ac'"""
self.check(b, a)
b = r"""br'\\\u20ac\U0001d121\\u20ac'"""
a = r"""br'\\\u20ac\U0001d121\\u20ac'"""
self.check(b, a)
def test_unicode_literal_escape_u(self):
b = r"""u'\\\u20ac\U0001d121\\u20ac'"""
a = r"""'\\\u20ac\U0001d121\\u20ac'"""
self.check(b, a)
b = r"""ur'\\\u20ac\U0001d121\\u20ac'"""
a = r"""r'\\\u20ac\U0001d121\\u20ac'"""
self.check(b, a)
def test_native_unicode_literal_escape_u(self):
f = 'from __future__ import unicode_literals\n'
b = f + r"""'\\\u20ac\U0001d121\\u20ac'"""
a = f + r"""'\\\u20ac\U0001d121\\u20ac'"""
self.check(b, a)
b = f + r"""r'\\\u20ac\U0001d121\\u20ac'"""
a = f + r"""r'\\\u20ac\U0001d121\\u20ac'"""
self.check(b, a)
class Test_callable(FixerTestCase):
fixer = "callable"
def test_prefix_preservation(self):
b = """callable( x)"""
a = """import collections\nisinstance( x, collections.Callable)"""
self.check(b, a)
b = """if callable(x): pass"""
a = """import collections
if isinstance(x, collections.Callable): pass"""
self.check(b, a)
def test_callable_call(self):
b = """callable(x)"""
a = """import collections\nisinstance(x, collections.Callable)"""
self.check(b, a)
def test_global_import(self):
b = """
def spam(foo):
callable(foo)"""[1:]
a = """
import collections
def spam(foo):
isinstance(foo, collections.Callable)"""[1:]
self.check(b, a)
b = """
import collections
def spam(foo):
callable(foo)"""[1:]
# same output if it was already imported
self.check(b, a)
b = """
from collections import *
def spam(foo):
callable(foo)"""[1:]
a = """
from collections import *
import collections
def spam(foo):
isinstance(foo, collections.Callable)"""[1:]
self.check(b, a)
b = """
do_stuff()
do_some_other_stuff()
assert callable(do_stuff)"""[1:]
a = """
import collections
do_stuff()
do_some_other_stuff()
assert isinstance(do_stuff, collections.Callable)"""[1:]
self.check(b, a)
b = """
if isinstance(do_stuff, Callable):
assert callable(do_stuff)
do_stuff(do_stuff)
if not callable(do_stuff):
exit(1)
else:
assert callable(do_stuff)
else:
assert not callable(do_stuff)"""[1:]
a = """
import collections
if isinstance(do_stuff, Callable):
assert isinstance(do_stuff, collections.Callable)
do_stuff(do_stuff)
if not isinstance(do_stuff, collections.Callable):
exit(1)
else:
assert isinstance(do_stuff, collections.Callable)
else:
assert not isinstance(do_stuff, collections.Callable)"""[1:]
self.check(b, a)
def test_callable_should_not_change(self):
a = """callable(*x)"""
self.unchanged(a)
a = """callable(x, y)"""
self.unchanged(a)
a = """callable(x, kw=y)"""
self.unchanged(a)
a = """callable()"""
self.unchanged(a)
class Test_filter(FixerTestCase):
fixer = "filter"
def test_prefix_preservation(self):
b = """x = filter( foo, 'abc' )"""
a = """x = list(filter( foo, 'abc' ))"""
self.check(b, a)
b = """x = filter( None , 'abc' )"""
a = """x = [_f for _f in 'abc' if _f]"""
self.check(b, a)
def test_filter_basic(self):
b = """x = filter(None, 'abc')"""
a = """x = [_f for _f in 'abc' if _f]"""
self.check(b, a)
b = """x = len(filter(f, 'abc'))"""
a = """x = len(list(filter(f, 'abc')))"""
self.check(b, a)
b = """x = filter(lambda x: x%2 == 0, range(10))"""
a = """x = [x for x in range(10) if x%2 == 0]"""
self.check(b, a)
# Note the parens around x
b = """x = filter(lambda (x): x%2 == 0, range(10))"""
a = """x = [x for x in range(10) if x%2 == 0]"""
self.check(b, a)
# XXX This (rare) case is not supported
## b = """x = filter(f, 'abc')[0]"""
## a = """x = list(filter(f, 'abc'))[0]"""
## self.check(b, a)
def test_filter_nochange(self):
a = """b.join(filter(f, 'abc'))"""
self.unchanged(a)
a = """(a + foo(5)).join(filter(f, 'abc'))"""
self.unchanged(a)
a = """iter(filter(f, 'abc'))"""
self.unchanged(a)
a = """list(filter(f, 'abc'))"""
self.unchanged(a)
a = """list(filter(f, 'abc'))[0]"""
self.unchanged(a)
a = """set(filter(f, 'abc'))"""
self.unchanged(a)
a = """set(filter(f, 'abc')).pop()"""
self.unchanged(a)
a = """tuple(filter(f, 'abc'))"""
self.unchanged(a)
a = """any(filter(f, 'abc'))"""
self.unchanged(a)
a = """all(filter(f, 'abc'))"""
self.unchanged(a)
a = """sum(filter(f, 'abc'))"""
self.unchanged(a)
a = """sorted(filter(f, 'abc'))"""
self.unchanged(a)
a = """sorted(filter(f, 'abc'), key=blah)"""
self.unchanged(a)
a = """sorted(filter(f, 'abc'), key=blah)[0]"""
self.unchanged(a)
a = """enumerate(filter(f, 'abc'))"""
self.unchanged(a)
a = """enumerate(filter(f, 'abc'), start=1)"""
self.unchanged(a)
a = """for i in filter(f, 'abc'): pass"""
self.unchanged(a)
a = """[x for x in filter(f, 'abc')]"""
self.unchanged(a)
a = """(x for x in filter(f, 'abc'))"""
self.unchanged(a)
def test_future_builtins(self):
a = "from future_builtins import spam, filter; filter(f, 'ham')"
self.unchanged(a)
b = """from future_builtins import spam; x = filter(f, 'abc')"""
a = """from future_builtins import spam; x = list(filter(f, 'abc'))"""
self.check(b, a)
a = "from future_builtins import *; filter(f, 'ham')"
self.unchanged(a)
class Test_map(FixerTestCase):
fixer = "map"
def check(self, b, a):
self.unchanged("from future_builtins import map; " + b, a)
super(Test_map, self).check(b, a)
def test_prefix_preservation(self):
b = """x = map( f, 'abc' )"""
a = """x = list(map( f, 'abc' ))"""
self.check(b, a)
def test_trailing_comment(self):
b = """x = map(f, 'abc') # foo"""
a = """x = list(map(f, 'abc')) # foo"""
self.check(b, a)
def test_None_with_multiple_arguments(self):
s = """x = map(None, a, b, c)"""
self.warns_unchanged(s, "cannot convert map(None, ...) with "
"multiple arguments")
def test_map_basic(self):
b = """x = map(f, 'abc')"""
a = """x = list(map(f, 'abc'))"""
self.check(b, a)
b = """x = len(map(f, 'abc', 'def'))"""
a = """x = len(list(map(f, 'abc', 'def')))"""
self.check(b, a)
b = """x = map(None, 'abc')"""
a = """x = list('abc')"""
self.check(b, a)
b = """x = map(lambda x: x+1, range(4))"""
a = """x = [x+1 for x in range(4)]"""
self.check(b, a)
# Note the parens around x
b = """x = map(lambda (x): x+1, range(4))"""
a = """x = [x+1 for x in range(4)]"""
self.check(b, a)
b = """
foo()
# foo
map(f, x)
"""
a = """
foo()
# foo
list(map(f, x))
"""
self.warns(b, a, "You should use a for loop here")
# XXX This (rare) case is not supported
## b = """x = map(f, 'abc')[0]"""
## a = """x = list(map(f, 'abc'))[0]"""
## self.check(b, a)
def test_map_nochange(self):
a = """b.join(map(f, 'abc'))"""
self.unchanged(a)
a = """(a + foo(5)).join(map(f, 'abc'))"""
self.unchanged(a)
a = """iter(map(f, 'abc'))"""
self.unchanged(a)
a = """list(map(f, 'abc'))"""
self.unchanged(a)
a = """list(map(f, 'abc'))[0]"""
self.unchanged(a)
a = """set(map(f, 'abc'))"""
self.unchanged(a)
a = """set(map(f, 'abc')).pop()"""
self.unchanged(a)
a = """tuple(map(f, 'abc'))"""
self.unchanged(a)
a = """any(map(f, 'abc'))"""
self.unchanged(a)
a = """all(map(f, 'abc'))"""
self.unchanged(a)
a = """sum(map(f, 'abc'))"""
self.unchanged(a)
a = """sorted(map(f, 'abc'))"""
self.unchanged(a)
a = """sorted(map(f, 'abc'), key=blah)"""
self.unchanged(a)
a = """sorted(map(f, 'abc'), key=blah)[0]"""
self.unchanged(a)
a = """enumerate(map(f, 'abc'))"""
self.unchanged(a)
a = """enumerate(map(f, 'abc'), start=1)"""
self.unchanged(a)
a = """for i in map(f, 'abc'): pass"""
self.unchanged(a)
a = """[x for x in map(f, 'abc')]"""
self.unchanged(a)
a = """(x for x in map(f, 'abc'))"""
self.unchanged(a)
def test_future_builtins(self):
a = "from future_builtins import spam, map, eggs; map(f, 'ham')"
self.unchanged(a)
b = """from future_builtins import spam, eggs; x = map(f, 'abc')"""
a = """from future_builtins import spam, eggs; x = list(map(f, 'abc'))"""
self.check(b, a)
a = "from future_builtins import *; map(f, 'ham')"
self.unchanged(a)
class Test_zip(FixerTestCase):
fixer = "zip"
def check(self, b, a):
self.unchanged("from future_builtins import zip; " + b, a)
super(Test_zip, self).check(b, a)
def test_zip_basic(self):
b = """x = zip(a, b, c)"""
a = """x = list(zip(a, b, c))"""
self.check(b, a)
b = """x = len(zip(a, b))"""
a = """x = len(list(zip(a, b)))"""
self.check(b, a)
def test_zip_nochange(self):
a = """b.join(zip(a, b))"""
self.unchanged(a)
a = """(a + foo(5)).join(zip(a, b))"""
self.unchanged(a)
a = """iter(zip(a, b))"""
self.unchanged(a)
a = """list(zip(a, b))"""
self.unchanged(a)
a = """list(zip(a, b))[0]"""
self.unchanged(a)
a = """set(zip(a, b))"""
self.unchanged(a)
a = """set(zip(a, b)).pop()"""
self.unchanged(a)
a = """tuple(zip(a, b))"""
self.unchanged(a)
a = """any(zip(a, b))"""
self.unchanged(a)
a = """all(zip(a, b))"""
self.unchanged(a)
a = """sum(zip(a, b))"""
self.unchanged(a)
a = """sorted(zip(a, b))"""
self.unchanged(a)
a = """sorted(zip(a, b), key=blah)"""
self.unchanged(a)
a = """sorted(zip(a, b), key=blah)[0]"""
self.unchanged(a)
a = """enumerate(zip(a, b))"""
self.unchanged(a)
a = """enumerate(zip(a, b), start=1)"""
self.unchanged(a)
a = """for i in zip(a, b): pass"""
self.unchanged(a)
a = """[x for x in zip(a, b)]"""
self.unchanged(a)
a = """(x for x in zip(a, b))"""
self.unchanged(a)
def test_future_builtins(self):
a = "from future_builtins import spam, zip, eggs; zip(a, b)"
self.unchanged(a)
b = """from future_builtins import spam, eggs; x = zip(a, b)"""
a = """from future_builtins import spam, eggs; x = list(zip(a, b))"""
self.check(b, a)
a = "from future_builtins import *; zip(a, b)"
self.unchanged(a)
class Test_standarderror(FixerTestCase):
fixer = "standarderror"
def test(self):
b = """x = StandardError()"""
a = """x = Exception()"""
self.check(b, a)
b = """x = StandardError(a, b, c)"""
a = """x = Exception(a, b, c)"""
self.check(b, a)
b = """f(2 + StandardError(a, b, c))"""
a = """f(2 + Exception(a, b, c))"""
self.check(b, a)
class Test_types(FixerTestCase):
fixer = "types"
def test_basic_types_convert(self):
b = """types.StringType"""
a = """bytes"""
self.check(b, a)
b = """types.DictType"""
a = """dict"""
self.check(b, a)
b = """types . IntType"""
a = """int"""
self.check(b, a)
b = """types.ListType"""
a = """list"""
self.check(b, a)
b = """types.LongType"""
a = """int"""
self.check(b, a)
b = """types.NoneType"""
a = """type(None)"""
self.check(b, a)
class Test_idioms(FixerTestCase):
fixer = "idioms"
def test_while(self):
b = """while 1: foo()"""
a = """while True: foo()"""
self.check(b, a)
b = """while 1: foo()"""
a = """while True: foo()"""
self.check(b, a)
b = """
while 1:
foo()
"""
a = """
while True:
foo()
"""
self.check(b, a)
def test_while_unchanged(self):
s = """while 11: foo()"""
self.unchanged(s)
s = """while 0: foo()"""
self.unchanged(s)
s = """while foo(): foo()"""
self.unchanged(s)
s = """while []: foo()"""
self.unchanged(s)
def test_eq_simple(self):
b = """type(x) == T"""
a = """isinstance(x, T)"""
self.check(b, a)
b = """if type(x) == T: pass"""
a = """if isinstance(x, T): pass"""
self.check(b, a)
def test_eq_reverse(self):
b = """T == type(x)"""
a = """isinstance(x, T)"""
self.check(b, a)
b = """if T == type(x): pass"""
a = """if isinstance(x, T): pass"""
self.check(b, a)
def test_eq_expression(self):
b = """type(x+y) == d.get('T')"""
a = """isinstance(x+y, d.get('T'))"""
self.check(b, a)
b = """type( x + y) == d.get('T')"""
a = """isinstance(x + y, d.get('T'))"""
self.check(b, a)
def test_is_simple(self):
b = """type(x) is T"""
a = """isinstance(x, T)"""
self.check(b, a)
b = """if type(x) is T: pass"""
a = """if isinstance(x, T): pass"""
self.check(b, a)
def test_is_reverse(self):
b = """T is type(x)"""
a = """isinstance(x, T)"""
self.check(b, a)
b = """if T is type(x): pass"""
a = """if isinstance(x, T): pass"""
self.check(b, a)
def test_is_expression(self):
b = """type(x+y) is d.get('T')"""
a = """isinstance(x+y, d.get('T'))"""
self.check(b, a)
b = """type( x + y) is d.get('T')"""
a = """isinstance(x + y, d.get('T'))"""
self.check(b, a)
def test_is_not_simple(self):
b = """type(x) is not T"""
a = """not isinstance(x, T)"""
self.check(b, a)
b = """if type(x) is not T: pass"""
a = """if not isinstance(x, T): pass"""
self.check(b, a)
def test_is_not_reverse(self):
b = """T is not type(x)"""
a = """not isinstance(x, T)"""
self.check(b, a)
b = """if T is not type(x): pass"""
a = """if not isinstance(x, T): pass"""
self.check(b, a)
def test_is_not_expression(self):
b = """type(x+y) is not d.get('T')"""
a = """not isinstance(x+y, d.get('T'))"""
self.check(b, a)
b = """type( x + y) is not d.get('T')"""
a = """not isinstance(x + y, d.get('T'))"""
self.check(b, a)
def test_ne_simple(self):
b = """type(x) != T"""
a = """not isinstance(x, T)"""
self.check(b, a)
b = """if type(x) != T: pass"""
a = """if not isinstance(x, T): pass"""
self.check(b, a)
def test_ne_reverse(self):
b = """T != type(x)"""
a = """not isinstance(x, T)"""
self.check(b, a)
b = """if T != type(x): pass"""
a = """if not isinstance(x, T): pass"""
self.check(b, a)
def test_ne_expression(self):
b = """type(x+y) != d.get('T')"""
a = """not isinstance(x+y, d.get('T'))"""
self.check(b, a)
b = """type( x + y) != d.get('T')"""
a = """not isinstance(x + y, d.get('T'))"""
self.check(b, a)
def test_type_unchanged(self):
a = """type(x).__name__"""
self.unchanged(a)
def test_sort_list_call(self):
b = """
v = list(t)
v.sort()
foo(v)
"""
a = """
v = sorted(t)
foo(v)
"""
self.check(b, a)
b = """
v = list(foo(b) + d)
v.sort()
foo(v)
"""
a = """
v = sorted(foo(b) + d)
foo(v)
"""
self.check(b, a)
b = """
while x:
v = list(t)
v.sort()
foo(v)
"""
a = """
while x:
v = sorted(t)
foo(v)
"""
self.check(b, a)
b = """
v = list(t)
# foo
v.sort()
foo(v)
"""
a = """
v = sorted(t)
# foo
foo(v)
"""
self.check(b, a)
b = r"""
v = list( t)
v.sort()
foo(v)
"""
a = r"""
v = sorted( t)
foo(v)
"""
self.check(b, a)
b = r"""
try:
m = list(s)
m.sort()
except: pass
"""
a = r"""
try:
m = sorted(s)
except: pass
"""
self.check(b, a)
b = r"""
try:
m = list(s)
# foo
m.sort()
except: pass
"""
a = r"""
try:
m = sorted(s)
# foo
except: pass
"""
self.check(b, a)
b = r"""
m = list(s)
# more comments
m.sort()"""
a = r"""
m = sorted(s)
# more comments"""
self.check(b, a)
def test_sort_simple_expr(self):
b = """
v = t
v.sort()
foo(v)
"""
a = """
v = sorted(t)
foo(v)
"""
self.check(b, a)
b = """
v = foo(b)
v.sort()
foo(v)
"""
a = """
v = sorted(foo(b))
foo(v)
"""
self.check(b, a)
b = """
v = b.keys()
v.sort()
foo(v)
"""
a = """
v = sorted(b.keys())
foo(v)
"""
self.check(b, a)
b = """
v = foo(b) + d
v.sort()
foo(v)
"""
a = """
v = sorted(foo(b) + d)
foo(v)
"""
self.check(b, a)
b = """
while x:
v = t
v.sort()
foo(v)
"""
a = """
while x:
v = sorted(t)
foo(v)
"""
self.check(b, a)
b = """
v = t
# foo
v.sort()
foo(v)
"""
a = """
v = sorted(t)
# foo
foo(v)
"""
self.check(b, a)
b = r"""
v = t
v.sort()
foo(v)
"""
a = r"""
v = sorted(t)
foo(v)
"""
self.check(b, a)
def test_sort_unchanged(self):
s = """
v = list(t)
w.sort()
foo(w)
"""
self.unchanged(s)
s = """
v = list(t)
v.sort(u)
foo(v)
"""
self.unchanged(s)
class Test_basestring(FixerTestCase):
fixer = "basestring"
def test_basestring(self):
b = """isinstance(x, basestring)"""
a = """isinstance(x, str)"""
self.check(b, a)
class Test_buffer(FixerTestCase):
fixer = "buffer"
def test_buffer(self):
b = """x = buffer(y)"""
a = """x = memoryview(y)"""
self.check(b, a)
def test_slicing(self):
b = """buffer(y)[4:5]"""
a = """memoryview(y)[4:5]"""
self.check(b, a)
class Test_future(FixerTestCase):
fixer = "future"
def test_future(self):
b = """from __future__ import braces"""
a = """"""
self.check(b, a)
b = """# comment\nfrom __future__ import braces"""
a = """# comment\n"""
self.check(b, a)
b = """from __future__ import braces\n# comment"""
a = """\n# comment"""
self.check(b, a)
def test_run_order(self):
self.assert_runs_after('print')
class Test_itertools(FixerTestCase):
fixer = "itertools"
def checkall(self, before, after):
# Because we need to check with and without the itertools prefix
# and on each of the three functions, these loops make it all
# much easier
for i in ('itertools.', ''):
for f in ('map', 'filter', 'zip'):
b = before %(i+'i'+f)
a = after %(f)
self.check(b, a)
def test_0(self):
# A simple example -- test_1 covers exactly the same thing,
# but it's not quite as clear.
b = "itertools.izip(a, b)"
a = "zip(a, b)"
self.check(b, a)
def test_1(self):
b = """%s(f, a)"""
a = """%s(f, a)"""
self.checkall(b, a)
def test_qualified(self):
b = """itertools.ifilterfalse(a, b)"""
a = """itertools.filterfalse(a, b)"""
self.check(b, a)
b = """itertools.izip_longest(a, b)"""
a = """itertools.zip_longest(a, b)"""
self.check(b, a)
def test_2(self):
b = """ifilterfalse(a, b)"""
a = """filterfalse(a, b)"""
self.check(b, a)
b = """izip_longest(a, b)"""
a = """zip_longest(a, b)"""
self.check(b, a)
def test_space_1(self):
b = """ %s(f, a)"""
a = """ %s(f, a)"""
self.checkall(b, a)
def test_space_2(self):
b = """ itertools.ifilterfalse(a, b)"""
a = """ itertools.filterfalse(a, b)"""
self.check(b, a)
b = """ itertools.izip_longest(a, b)"""
a = """ itertools.zip_longest(a, b)"""
self.check(b, a)
def test_run_order(self):
self.assert_runs_after('map', 'zip', 'filter')
class Test_itertools_imports(FixerTestCase):
fixer = 'itertools_imports'
def test_reduced(self):
b = "from itertools import imap, izip, foo"
a = "from itertools import foo"
self.check(b, a)
b = "from itertools import bar, imap, izip, foo"
a = "from itertools import bar, foo"
self.check(b, a)
b = "from itertools import chain, imap, izip"
a = "from itertools import chain"
self.check(b, a)
def test_comments(self):
b = "#foo\nfrom itertools import imap, izip"
a = "#foo\n"
self.check(b, a)
def test_none(self):
b = "from itertools import imap, izip"
a = ""
self.check(b, a)
b = "from itertools import izip"
a = ""
self.check(b, a)
def test_import_as(self):
b = "from itertools import izip, bar as bang, imap"
a = "from itertools import bar as bang"
self.check(b, a)
b = "from itertools import izip as _zip, imap, bar"
a = "from itertools import bar"
self.check(b, a)
b = "from itertools import imap as _map"
a = ""
self.check(b, a)
b = "from itertools import imap as _map, izip as _zip"
a = ""
self.check(b, a)
s = "from itertools import bar as bang"
self.unchanged(s)
def test_ifilter_and_zip_longest(self):
for name in "filterfalse", "zip_longest":
b = "from itertools import i%s" % (name,)
a = "from itertools import %s" % (name,)
self.check(b, a)
b = "from itertools import imap, i%s, foo" % (name,)
a = "from itertools import %s, foo" % (name,)
self.check(b, a)
b = "from itertools import bar, i%s, foo" % (name,)
a = "from itertools import bar, %s, foo" % (name,)
self.check(b, a)
def test_import_star(self):
s = "from itertools import *"
self.unchanged(s)
def test_unchanged(self):
s = "from itertools import foo"
self.unchanged(s)
class Test_import(FixerTestCase):
fixer = "import"
def setUp(self):
super(Test_import, self).setUp()
# Need to replace fix_import's exists method
# so we can check that it's doing the right thing
self.files_checked = []
self.present_files = set()
self.always_exists = True
def fake_exists(name):
self.files_checked.append(name)
return self.always_exists or (name in self.present_files)
from lib2to3.fixes import fix_import
fix_import.exists = fake_exists
def tearDown(self):
from lib2to3.fixes import fix_import
fix_import.exists = os.path.exists
def check_both(self, b, a):
self.always_exists = True
super(Test_import, self).check(b, a)
self.always_exists = False
super(Test_import, self).unchanged(b)
def test_files_checked(self):
def p(path):
# Takes a unix path and returns a path with correct separators
return os.path.pathsep.join(path.split("/"))
self.always_exists = False
self.present_files = set(['__init__.py'])
expected_extensions = ('.py', os.path.sep, '.pyc', '.so', '.sl', '.pyd')
names_to_test = (p("/spam/eggs.py"), "ni.py", p("../../shrubbery.py"))
for name in names_to_test:
self.files_checked = []
self.filename = name
self.unchanged("import jam")
if os.path.dirname(name):
name = os.path.dirname(name) + '/jam'
else:
name = 'jam'
expected_checks = set(name + ext for ext in expected_extensions)
expected_checks.add("__init__.py")
self.assertEqual(set(self.files_checked), expected_checks)
def test_not_in_package(self):
s = "import bar"
self.always_exists = False
self.present_files = set(["bar.py"])
self.unchanged(s)
def test_with_absolute_import_enabled(self):
s = "from __future__ import absolute_import\nimport bar"
self.always_exists = False
self.present_files = set(["__init__.py", "bar.py"])
self.unchanged(s)
def test_in_package(self):
b = "import bar"
a = "from . import bar"
self.always_exists = False
self.present_files = set(["__init__.py", "bar.py"])
self.check(b, a)
def test_import_from_package(self):
b = "import bar"
a = "from . import bar"
self.always_exists = False
self.present_files = set(["__init__.py", "bar" + os.path.sep])
self.check(b, a)
def test_already_relative_import(self):
s = "from . import bar"
self.unchanged(s)
def test_comments_and_indent(self):
b = "import bar # Foo"
a = "from . import bar # Foo"
self.check(b, a)
def test_from(self):
b = "from foo import bar, baz"
a = "from .foo import bar, baz"
self.check_both(b, a)
b = "from foo import bar"
a = "from .foo import bar"
self.check_both(b, a)
b = "from foo import (bar, baz)"
a = "from .foo import (bar, baz)"
self.check_both(b, a)
def test_dotted_from(self):
b = "from green.eggs import ham"
a = "from .green.eggs import ham"
self.check_both(b, a)
def test_from_as(self):
b = "from green.eggs import ham as spam"
a = "from .green.eggs import ham as spam"
self.check_both(b, a)
def test_import(self):
b = "import foo"
a = "from . import foo"
self.check_both(b, a)
b = "import foo, bar"
a = "from . import foo, bar"
self.check_both(b, a)
b = "import foo, bar, x"
a = "from . import foo, bar, x"
self.check_both(b, a)
b = "import x, y, z"
a = "from . import x, y, z"
self.check_both(b, a)
def test_import_as(self):
b = "import foo as x"
a = "from . import foo as x"
self.check_both(b, a)
b = "import a as b, b as c, c as d"
a = "from . import a as b, b as c, c as d"
self.check_both(b, a)
def test_local_and_absolute(self):
self.always_exists = False
self.present_files = set(["foo.py", "__init__.py"])
s = "import foo, bar"
self.warns_unchanged(s, "absolute and local imports together")
def test_dotted_import(self):
b = "import foo.bar"
a = "from . import foo.bar"
self.check_both(b, a)
def test_dotted_import_as(self):
b = "import foo.bar as bang"
a = "from . import foo.bar as bang"
self.check_both(b, a)
def test_prefix(self):
b = """
# prefix
import foo.bar
"""
a = """
# prefix
from . import foo.bar
"""
self.check_both(b, a)
class Test_set_literal(FixerTestCase):
fixer = "set_literal"
def test_basic(self):
b = """set([1, 2, 3])"""
a = """{1, 2, 3}"""
self.check(b, a)
b = """set((1, 2, 3))"""
a = """{1, 2, 3}"""
self.check(b, a)
b = """set((1,))"""
a = """{1}"""
self.check(b, a)
b = """set([1])"""
self.check(b, a)
b = """set((a, b))"""
a = """{a, b}"""
self.check(b, a)
b = """set([a, b])"""
self.check(b, a)
b = """set((a*234, f(args=23)))"""
a = """{a*234, f(args=23)}"""
self.check(b, a)
b = """set([a*23, f(23)])"""
a = """{a*23, f(23)}"""
self.check(b, a)
b = """set([a-234**23])"""
a = """{a-234**23}"""
self.check(b, a)
def test_listcomps(self):
b = """set([x for x in y])"""
a = """{x for x in y}"""
self.check(b, a)
b = """set([x for x in y if x == m])"""
a = """{x for x in y if x == m}"""
self.check(b, a)
b = """set([x for x in y for a in b])"""
a = """{x for x in y for a in b}"""
self.check(b, a)
b = """set([f(x) - 23 for x in y])"""
a = """{f(x) - 23 for x in y}"""
self.check(b, a)
def test_whitespace(self):
b = """set( [1, 2])"""
a = """{1, 2}"""
self.check(b, a)
b = """set([1 , 2])"""
a = """{1 , 2}"""
self.check(b, a)
b = """set([ 1 ])"""
a = """{ 1 }"""
self.check(b, a)
b = """set( [1] )"""
a = """{1}"""
self.check(b, a)
b = """set([ 1, 2 ])"""
a = """{ 1, 2 }"""
self.check(b, a)
b = """set([x for x in y ])"""
a = """{x for x in y }"""
self.check(b, a)
b = """set(
[1, 2]
)
"""
a = """{1, 2}\n"""
self.check(b, a)
def test_comments(self):
b = """set((1, 2)) # Hi"""
a = """{1, 2} # Hi"""
self.check(b, a)
# This isn't optimal behavior, but the fixer is optional.
b = """
# Foo
set( # Bar
(1, 2)
)
"""
a = """
# Foo
{1, 2}
"""
self.check(b, a)
def test_unchanged(self):
s = """set()"""
self.unchanged(s)
s = """set(a)"""
self.unchanged(s)
s = """set(a, b, c)"""
self.unchanged(s)
# Don't transform generators because they might have to be lazy.
s = """set(x for x in y)"""
self.unchanged(s)
s = """set(x for x in y if z)"""
self.unchanged(s)
s = """set(a*823-23**2 + f(23))"""
self.unchanged(s)
class Test_sys_exc(FixerTestCase):
fixer = "sys_exc"
def test_0(self):
b = "sys.exc_type"
a = "sys.exc_info()[0]"
self.check(b, a)
def test_1(self):
b = "sys.exc_value"
a = "sys.exc_info()[1]"
self.check(b, a)
def test_2(self):
b = "sys.exc_traceback"
a = "sys.exc_info()[2]"
self.check(b, a)
def test_3(self):
b = "sys.exc_type # Foo"
a = "sys.exc_info()[0] # Foo"
self.check(b, a)
def test_4(self):
b = "sys. exc_type"
a = "sys. exc_info()[0]"
self.check(b, a)
def test_5(self):
b = "sys .exc_type"
a = "sys .exc_info()[0]"
self.check(b, a)
class Test_paren(FixerTestCase):
fixer = "paren"
def test_0(self):
b = """[i for i in 1, 2 ]"""
a = """[i for i in (1, 2) ]"""
self.check(b, a)
def test_1(self):
b = """[i for i in 1, 2, ]"""
a = """[i for i in (1, 2,) ]"""
self.check(b, a)
def test_2(self):
b = """[i for i in 1, 2 ]"""
a = """[i for i in (1, 2) ]"""
self.check(b, a)
def test_3(self):
b = """[i for i in 1, 2 if i]"""
a = """[i for i in (1, 2) if i]"""
self.check(b, a)
def test_4(self):
b = """[i for i in 1, 2 ]"""
a = """[i for i in (1, 2) ]"""
self.check(b, a)
def test_5(self):
b = """(i for i in 1, 2)"""
a = """(i for i in (1, 2))"""
self.check(b, a)
def test_6(self):
b = """(i for i in 1 ,2 if i)"""
a = """(i for i in (1 ,2) if i)"""
self.check(b, a)
def test_unchanged_0(self):
s = """[i for i in (1, 2)]"""
self.unchanged(s)
def test_unchanged_1(self):
s = """[i for i in foo()]"""
self.unchanged(s)
def test_unchanged_2(self):
s = """[i for i in (1, 2) if nothing]"""
self.unchanged(s)
def test_unchanged_3(self):
s = """(i for i in (1, 2))"""
self.unchanged(s)
def test_unchanged_4(self):
s = """[i for i in m]"""
self.unchanged(s)
class Test_metaclass(FixerTestCase):
fixer = 'metaclass'
def test_unchanged(self):
self.unchanged("class X(): pass")
self.unchanged("class X(object): pass")
self.unchanged("class X(object1, object2): pass")
self.unchanged("class X(object1, object2, object3): pass")
self.unchanged("class X(metaclass=Meta): pass")
self.unchanged("class X(b, arg=23, metclass=Meta): pass")
self.unchanged("class X(b, arg=23, metaclass=Meta, other=42): pass")
s = """
class X:
def __metaclass__(self): pass
"""
self.unchanged(s)
s = """
class X:
a[23] = 74
"""
self.unchanged(s)
def test_comments(self):
b = """
class X:
# hi
__metaclass__ = AppleMeta
"""
a = """
class X(metaclass=AppleMeta):
# hi
pass
"""
self.check(b, a)
b = """
class X:
__metaclass__ = Meta
# Bedtime!
"""
a = """
class X(metaclass=Meta):
pass
# Bedtime!
"""
self.check(b, a)
def test_meta(self):
# no-parent class, odd body
b = """
class X():
__metaclass__ = Q
pass
"""
a = """
class X(metaclass=Q):
pass
"""
self.check(b, a)
# one parent class, no body
b = """class X(object): __metaclass__ = Q"""
a = """class X(object, metaclass=Q): pass"""
self.check(b, a)
# one parent, simple body
b = """
class X(object):
__metaclass__ = Meta
bar = 7
"""
a = """
class X(object, metaclass=Meta):
bar = 7
"""
self.check(b, a)
b = """
class X:
__metaclass__ = Meta; x = 4; g = 23
"""
a = """
class X(metaclass=Meta):
x = 4; g = 23
"""
self.check(b, a)
# one parent, simple body, __metaclass__ last
b = """
class X(object):
bar = 7
__metaclass__ = Meta
"""
a = """
class X(object, metaclass=Meta):
bar = 7
"""
self.check(b, a)
# redefining __metaclass__
b = """
class X():
__metaclass__ = A
__metaclass__ = B
bar = 7
"""
a = """
class X(metaclass=B):
bar = 7
"""
self.check(b, a)
# multiple inheritance, simple body
b = """
class X(clsA, clsB):
__metaclass__ = Meta
bar = 7
"""
a = """
class X(clsA, clsB, metaclass=Meta):
bar = 7
"""
self.check(b, a)
# keywords in the class statement
b = """class m(a, arg=23): __metaclass__ = Meta"""
a = """class m(a, arg=23, metaclass=Meta): pass"""
self.check(b, a)
b = """
class X(expression(2 + 4)):
__metaclass__ = Meta
"""
a = """
class X(expression(2 + 4), metaclass=Meta):
pass
"""
self.check(b, a)
b = """
class X(expression(2 + 4), x**4):
__metaclass__ = Meta
"""
a = """
class X(expression(2 + 4), x**4, metaclass=Meta):
pass
"""
self.check(b, a)
b = """
class X:
__metaclass__ = Meta
save.py = 23
"""
a = """
class X(metaclass=Meta):
save.py = 23
"""
self.check(b, a)
class Test_getcwdu(FixerTestCase):
fixer = 'getcwdu'
def test_basic(self):
b = """os.getcwdu"""
a = """os.getcwd"""
self.check(b, a)
b = """os.getcwdu()"""
a = """os.getcwd()"""
self.check(b, a)
b = """meth = os.getcwdu"""
a = """meth = os.getcwd"""
self.check(b, a)
b = """os.getcwdu(args)"""
a = """os.getcwd(args)"""
self.check(b, a)
def test_comment(self):
b = """os.getcwdu() # Foo"""
a = """os.getcwd() # Foo"""
self.check(b, a)
def test_unchanged(self):
s = """os.getcwd()"""
self.unchanged(s)
s = """getcwdu()"""
self.unchanged(s)
s = """os.getcwdb()"""
self.unchanged(s)
def test_indentation(self):
b = """
if 1:
os.getcwdu()
"""
a = """
if 1:
os.getcwd()
"""
self.check(b, a)
def test_multilation(self):
b = """os .getcwdu()"""
a = """os .getcwd()"""
self.check(b, a)
b = """os. getcwdu"""
a = """os. getcwd"""
self.check(b, a)
b = """os.getcwdu ( )"""
a = """os.getcwd ( )"""
self.check(b, a)
class Test_operator(FixerTestCase):
fixer = "operator"
def test_operator_isCallable(self):
b = "operator.isCallable(x)"
a = "hasattr(x, '__call__')"
self.check(b, a)
def test_operator_sequenceIncludes(self):
b = "operator.sequenceIncludes(x, y)"
a = "operator.contains(x, y)"
self.check(b, a)
b = "operator .sequenceIncludes(x, y)"
a = "operator .contains(x, y)"
self.check(b, a)
b = "operator. sequenceIncludes(x, y)"
a = "operator. contains(x, y)"
self.check(b, a)
def test_operator_isSequenceType(self):
b = "operator.isSequenceType(x)"
a = "import collections\nisinstance(x, collections.Sequence)"
self.check(b, a)
def test_operator_isMappingType(self):
b = "operator.isMappingType(x)"
a = "import collections\nisinstance(x, collections.Mapping)"
self.check(b, a)
def test_operator_isNumberType(self):
b = "operator.isNumberType(x)"
a = "import numbers\nisinstance(x, numbers.Number)"
self.check(b, a)
def test_operator_repeat(self):
b = "operator.repeat(x, n)"
a = "operator.mul(x, n)"
self.check(b, a)
b = "operator .repeat(x, n)"
a = "operator .mul(x, n)"
self.check(b, a)
b = "operator. repeat(x, n)"
a = "operator. mul(x, n)"
self.check(b, a)
def test_operator_irepeat(self):
b = "operator.irepeat(x, n)"
a = "operator.imul(x, n)"
self.check(b, a)
b = "operator .irepeat(x, n)"
a = "operator .imul(x, n)"
self.check(b, a)
b = "operator. irepeat(x, n)"
a = "operator. imul(x, n)"
self.check(b, a)
def test_bare_isCallable(self):
s = "isCallable(x)"
t = "You should use 'hasattr(x, '__call__')' here."
self.warns_unchanged(s, t)
def test_bare_sequenceIncludes(self):
s = "sequenceIncludes(x, y)"
t = "You should use 'operator.contains(x, y)' here."
self.warns_unchanged(s, t)
def test_bare_operator_isSequenceType(self):
s = "isSequenceType(z)"
t = "You should use 'isinstance(z, collections.Sequence)' here."
self.warns_unchanged(s, t)
def test_bare_operator_isMappingType(self):
s = "isMappingType(x)"
t = "You should use 'isinstance(x, collections.Mapping)' here."
self.warns_unchanged(s, t)
def test_bare_operator_isNumberType(self):
s = "isNumberType(y)"
t = "You should use 'isinstance(y, numbers.Number)' here."
self.warns_unchanged(s, t)
def test_bare_operator_repeat(self):
s = "repeat(x, n)"
t = "You should use 'operator.mul(x, n)' here."
self.warns_unchanged(s, t)
def test_bare_operator_irepeat(self):
s = "irepeat(y, 187)"
t = "You should use 'operator.imul(y, 187)' here."
self.warns_unchanged(s, t)
class Test_exitfunc(FixerTestCase):
fixer = "exitfunc"
def test_simple(self):
b = """
import sys
sys.exitfunc = my_atexit
"""
a = """
import sys
import atexit
atexit.register(my_atexit)
"""
self.check(b, a)
def test_names_import(self):
b = """
import sys, crumbs
sys.exitfunc = my_func
"""
a = """
import sys, crumbs, atexit
atexit.register(my_func)
"""
self.check(b, a)
def test_complex_expression(self):
b = """
import sys
sys.exitfunc = do(d)/a()+complex(f=23, g=23)*expression
"""
a = """
import sys
import atexit
atexit.register(do(d)/a()+complex(f=23, g=23)*expression)
"""
self.check(b, a)
def test_comments(self):
b = """
import sys # Foo
sys.exitfunc = f # Blah
"""
a = """
import sys
import atexit # Foo
atexit.register(f) # Blah
"""
self.check(b, a)
b = """
import apples, sys, crumbs, larry # Pleasant comments
sys.exitfunc = func
"""
a = """
import apples, sys, crumbs, larry, atexit # Pleasant comments
atexit.register(func)
"""
self.check(b, a)
def test_in_a_function(self):
b = """
import sys
def f():
sys.exitfunc = func
"""
a = """
import sys
import atexit
def f():
atexit.register(func)
"""
self.check(b, a)
def test_no_sys_import(self):
b = """sys.exitfunc = f"""
a = """atexit.register(f)"""
msg = ("Can't find sys import; Please add an atexit import at the "
"top of your file.")
self.warns(b, a, msg)
def test_unchanged(self):
s = """f(sys.exitfunc)"""
self.unchanged(s)
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