cpython/Lib/test/test_repr.py

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"""
Test cases for the repr module
Nick Mathewson
"""
import sys
import os
import unittest
from test_support import run_unittest
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from repr import repr as r # Don't shadow builtin repr
def nestedTuple(nesting):
t = ()
for i in range(nesting):
t = (t,)
return t
class ReprTests(unittest.TestCase):
def test_string(self):
eq = self.assertEquals
eq(r("abc"), "'abc'")
eq(r("abcdefghijklmnop"),"'abcdefghijklmnop'")
s = "a"*30+"b"*30
expected = `s`[:13] + "..." + `s`[-14:]
eq(r(s), expected)
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eq(r("\"'"), repr("\"'"))
s = "\""*30+"'"*100
expected = `s`[:13] + "..." + `s`[-14:]
eq(r(s), expected)
def test_container(self):
eq = self.assertEquals
# Tuples give up after 6 elements
eq(r(()), "()")
eq(r((1,)), "(1,)")
eq(r((1, 2, 3)), "(1, 2, 3)")
eq(r((1, 2, 3, 4, 5, 6)), "(1, 2, 3, 4, 5, 6)")
eq(r((1, 2, 3, 4, 5, 6, 7)), "(1, 2, 3, 4, 5, 6, ...)")
# Lists give up after 6 as well
eq(r([]), "[]")
eq(r([1]), "[1]")
eq(r([1, 2, 3]), "[1, 2, 3]")
eq(r([1, 2, 3, 4, 5, 6]), "[1, 2, 3, 4, 5, 6]")
eq(r([1, 2, 3, 4, 5, 6, 7]), "[1, 2, 3, 4, 5, 6, ...]")
# Dictionaries give up after 4.
eq(r({}), "{}")
d = {'alice': 1, 'bob': 2, 'charles': 3, 'dave': 4}
eq(r(d), "{'alice': 1, 'bob': 2, 'charles': 3, 'dave': 4}")
d['arthur'] = 1
eq(r(d), "{'alice': 1, 'arthur': 1, 'bob': 2, 'charles': 3, ...}")
def test_numbers(self):
eq = self.assertEquals
eq(r(123), repr(123))
eq(r(123L), repr(123L))
eq(r(1.0/3), repr(1.0/3))
n = 10L**100
expected = `n`[:18] + "..." + `n`[-19:]
eq(r(n), expected)
def test_instance(self):
eq = self.assertEquals
i1 = ClassWithRepr("a")
eq(r(i1), repr(i1))
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i2 = ClassWithRepr("x"*1000)
expected = `i2`[:13] + "..." + `i2`[-14:]
eq(r(i2), expected)
i3 = ClassWithFailingRepr()
eq(r(i3), ("<ClassWithFailingRepr instance at %x>"%id(i3)))
s = r(ClassWithFailingRepr)
self.failUnless(s.startswith("<class "))
self.failUnless(s.endswith(">"))
self.failUnless(s.find("...") == 8)
def test_file(self):
fp = open(unittest.__file__)
self.failUnless(repr(fp).startswith(
"<open file '%s', mode 'r' at 0x" % unittest.__file__))
fp.close()
self.failUnless(repr(fp).startswith(
"<closed file '%s', mode 'r' at 0x" % unittest.__file__))
def test_lambda(self):
self.failUnless(repr(lambda x: x).startswith(
"<function <lambda"))
# XXX anonymous functions? see func_repr
def test_builtin_function(self):
eq = self.assertEquals
# Functions
eq(repr(hash), '<built-in function hash>')
# Methods
self.failUnless(repr(''.split).startswith(
'<built-in method split of str object at 0x'))
def test_xrange(self):
eq = self.assertEquals
eq(repr(xrange(1)), 'xrange(1)')
eq(repr(xrange(1, 2)), 'xrange(1, 2)')
eq(repr(xrange(1, 2, 3)), 'xrange(1, 4, 3)')
# Turn off warnings for deprecated multiplication
import warnings
warnings.filterwarnings('ignore', category=DeprecationWarning,
module=ReprTests.__module__)
eq(repr(xrange(1) * 3), '(xrange(1) * 3)')
def test_nesting(self):
eq = self.assertEquals
# everything is meant to give up after 6 levels.
eq(r([[[[[[[]]]]]]]), "[[[[[[[]]]]]]]")
eq(r([[[[[[[[]]]]]]]]), "[[[[[[[...]]]]]]]")
eq(r(nestedTuple(6)), "(((((((),),),),),),)")
eq(r(nestedTuple(7)), "(((((((...),),),),),),)")
eq(r({ nestedTuple(5) : nestedTuple(5) }),
"{((((((),),),),),): ((((((),),),),),)}")
eq(r({ nestedTuple(6) : nestedTuple(6) }),
"{((((((...),),),),),): ((((((...),),),),),)}")
eq(r([[[[[[{}]]]]]]), "[[[[[[{}]]]]]]")
eq(r([[[[[[[{}]]]]]]]), "[[[[[[[...]]]]]]]")
def test_buffer(self):
# XXX doesn't test buffers with no b_base or read-write buffers (see
# bufferobject.c). The test is fairly incomplete too. Sigh.
x = buffer('foo')
self.failUnless(repr(x).startswith('<read-only buffer for 0x'))
def test_cell(self):
# XXX Hmm? How to get at a cell object?
pass
def test_descriptors(self):
eq = self.assertEquals
# method descriptors
eq(repr(dict.items), "<method 'items' of 'dict' objects>")
# XXX member descriptors
# XXX attribute descriptors
# XXX slot descriptors
# static and class methods
class C:
def foo(cls): pass
x = staticmethod(C.foo)
self.failUnless(repr(x).startswith('<staticmethod object at 0x'))
x = classmethod(C.foo)
self.failUnless(repr(x).startswith('<classmethod object at 0x'))
def touch(path, text=''):
fp = open(path, 'w')
fp.write(text)
fp.close()
def zap(actions, dirname, names):
for name in names:
actions.append(os.path.join(dirname, name))
class LongReprTest(unittest.TestCase):
def setUp(self):
longname = 'areallylongpackageandmodulenametotestreprtruncation'
self.pkgname = os.path.join(longname)
self.subpkgname = os.path.join(longname, longname)
# Make the package and subpackage
os.mkdir(self.pkgname)
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touch(os.path.join(self.pkgname, '__init__'+os.extsep+'py'))
os.mkdir(self.subpkgname)
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touch(os.path.join(self.subpkgname, '__init__'+os.extsep+'py'))
# Remember where we are
self.here = os.getcwd()
sys.path.insert(0, self.here)
def tearDown(self):
actions = []
os.path.walk(self.pkgname, zap, actions)
actions.append(self.pkgname)
actions.sort()
actions.reverse()
for p in actions:
if os.path.isdir(p):
os.rmdir(p)
else:
os.remove(p)
del sys.path[0]
def test_module(self):
eq = self.assertEquals
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touch(os.path.join(self.subpkgname, self.pkgname + os.extsep + 'py'))
from areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation import areallylongpackageandmodulenametotestreprtruncation
eq(repr(areallylongpackageandmodulenametotestreprtruncation),
"<module 'areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation' from '%s'>" % areallylongpackageandmodulenametotestreprtruncation.__file__)
eq(repr(sys), "<module 'sys' (built-in)>")
def test_type(self):
eq = self.assertEquals
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touch(os.path.join(self.subpkgname, 'foo'+os.extsep+'py'), '''\
class foo(object):
pass
''')
from areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation import foo
eq(repr(foo.foo),
"<class 'areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation.foo.foo'>")
def test_object(self):
# XXX Test the repr of a type with a really long tp_name but with no
# tp_repr. WIBNI we had ::Inline? :)
pass
def test_class(self):
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touch(os.path.join(self.subpkgname, 'bar'+os.extsep+'py'), '''\
class bar:
pass
''')
from areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation import bar
self.failUnless(repr(bar.bar).startswith(
"<class areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation.bar.bar at 0x"))
def test_instance(self):
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touch(os.path.join(self.subpkgname, 'baz'+os.extsep+'py'), '''\
class baz:
pass
''')
from areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation import baz
ibaz = baz.baz()
self.failUnless(repr(ibaz).startswith(
"<areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation.baz.baz instance at 0x"))
def test_method(self):
eq = self.assertEquals
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touch(os.path.join(self.subpkgname, 'qux'+os.extsep+'py'), '''\
class aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa:
def amethod(self): pass
''')
from areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation import qux
# Unbound methods first
eq(repr(qux.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.amethod),
'<unbound method aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.amethod>')
# Bound method next
iqux = qux.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()
self.failUnless(repr(iqux.amethod).startswith(
'<bound method aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.amethod of <areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation.qux.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa instance at 0x'))
def test_builtin_function(self):
# XXX test built-in functions and methods with really long names
pass
class ClassWithRepr:
def __init__(self, s):
self.s = s
def __repr__(self):
return "ClassWithLongRepr(%r)" % self.s
class ClassWithFailingRepr:
def __repr__(self):
raise Exception("This should be caught by Repr.repr_instance")
def test_main():
run_unittest(ReprTests)
if os.name != 'mac':
run_unittest(LongReprTest)
if __name__ == "__main__":
test_main()