mirror of https://github.com/python/cpython
338 lines
12 KiB
Python
338 lines
12 KiB
Python
"""
|
|
Unit tests for refactor.py.
|
|
"""
|
|
|
|
import sys
|
|
import os
|
|
import codecs
|
|
import io
|
|
import re
|
|
import tempfile
|
|
import shutil
|
|
import unittest
|
|
|
|
from lib2to3 import refactor, pygram, fixer_base
|
|
from lib2to3.pgen2 import token
|
|
|
|
|
|
TEST_DATA_DIR = os.path.join(os.path.dirname(__file__), "data")
|
|
FIXER_DIR = os.path.join(TEST_DATA_DIR, "fixers")
|
|
|
|
sys.path.append(FIXER_DIR)
|
|
try:
|
|
_DEFAULT_FIXERS = refactor.get_fixers_from_package("myfixes")
|
|
finally:
|
|
sys.path.pop()
|
|
|
|
_2TO3_FIXERS = refactor.get_fixers_from_package("lib2to3.fixes")
|
|
|
|
class TestRefactoringTool(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
sys.path.append(FIXER_DIR)
|
|
|
|
def tearDown(self):
|
|
sys.path.pop()
|
|
|
|
def check_instances(self, instances, classes):
|
|
for inst, cls in zip(instances, classes):
|
|
if not isinstance(inst, cls):
|
|
self.fail("%s are not instances of %s" % instances, classes)
|
|
|
|
def rt(self, options=None, fixers=_DEFAULT_FIXERS, explicit=None):
|
|
return refactor.RefactoringTool(fixers, options, explicit)
|
|
|
|
def test_print_function_option(self):
|
|
rt = self.rt({"print_function" : True})
|
|
self.assertNotIn("print", rt.grammar.keywords)
|
|
self.assertNotIn("print", rt.driver.grammar.keywords)
|
|
|
|
def test_exec_function_option(self):
|
|
rt = self.rt({"exec_function" : True})
|
|
self.assertNotIn("exec", rt.grammar.keywords)
|
|
self.assertNotIn("exec", rt.driver.grammar.keywords)
|
|
|
|
def test_write_unchanged_files_option(self):
|
|
rt = self.rt()
|
|
self.assertFalse(rt.write_unchanged_files)
|
|
rt = self.rt({"write_unchanged_files" : True})
|
|
self.assertTrue(rt.write_unchanged_files)
|
|
|
|
def test_fixer_loading_helpers(self):
|
|
contents = ["explicit", "first", "last", "parrot", "preorder"]
|
|
non_prefixed = refactor.get_all_fix_names("myfixes")
|
|
prefixed = refactor.get_all_fix_names("myfixes", False)
|
|
full_names = refactor.get_fixers_from_package("myfixes")
|
|
self.assertEqual(prefixed, ["fix_" + name for name in contents])
|
|
self.assertEqual(non_prefixed, contents)
|
|
self.assertEqual(full_names,
|
|
["myfixes.fix_" + name for name in contents])
|
|
|
|
def test_detect_future_features(self):
|
|
run = refactor._detect_future_features
|
|
fs = frozenset
|
|
empty = fs()
|
|
self.assertEqual(run(""), empty)
|
|
self.assertEqual(run("from __future__ import print_function"),
|
|
fs(("print_function",)))
|
|
self.assertEqual(run("from __future__ import generators"),
|
|
fs(("generators",)))
|
|
self.assertEqual(run("from __future__ import generators, feature"),
|
|
fs(("generators", "feature")))
|
|
inp = "from __future__ import generators, print_function"
|
|
self.assertEqual(run(inp), fs(("generators", "print_function")))
|
|
inp ="from __future__ import print_function, generators"
|
|
self.assertEqual(run(inp), fs(("print_function", "generators")))
|
|
inp = "from __future__ import (print_function,)"
|
|
self.assertEqual(run(inp), fs(("print_function",)))
|
|
inp = "from __future__ import (generators, print_function)"
|
|
self.assertEqual(run(inp), fs(("generators", "print_function")))
|
|
inp = "from __future__ import (generators, nested_scopes)"
|
|
self.assertEqual(run(inp), fs(("generators", "nested_scopes")))
|
|
inp = """from __future__ import generators
|
|
from __future__ import print_function"""
|
|
self.assertEqual(run(inp), fs(("generators", "print_function")))
|
|
invalid = ("from",
|
|
"from 4",
|
|
"from x",
|
|
"from x 5",
|
|
"from x im",
|
|
"from x import",
|
|
"from x import 4",
|
|
)
|
|
for inp in invalid:
|
|
self.assertEqual(run(inp), empty)
|
|
inp = "'docstring'\nfrom __future__ import print_function"
|
|
self.assertEqual(run(inp), fs(("print_function",)))
|
|
inp = "'docstring'\n'somng'\nfrom __future__ import print_function"
|
|
self.assertEqual(run(inp), empty)
|
|
inp = "# comment\nfrom __future__ import print_function"
|
|
self.assertEqual(run(inp), fs(("print_function",)))
|
|
inp = "# comment\n'doc'\nfrom __future__ import print_function"
|
|
self.assertEqual(run(inp), fs(("print_function",)))
|
|
inp = "class x: pass\nfrom __future__ import print_function"
|
|
self.assertEqual(run(inp), empty)
|
|
|
|
def test_get_headnode_dict(self):
|
|
class NoneFix(fixer_base.BaseFix):
|
|
pass
|
|
|
|
class FileInputFix(fixer_base.BaseFix):
|
|
PATTERN = "file_input< any * >"
|
|
|
|
class SimpleFix(fixer_base.BaseFix):
|
|
PATTERN = "'name'"
|
|
|
|
no_head = NoneFix({}, [])
|
|
with_head = FileInputFix({}, [])
|
|
simple = SimpleFix({}, [])
|
|
d = refactor._get_headnode_dict([no_head, with_head, simple])
|
|
top_fixes = d.pop(pygram.python_symbols.file_input)
|
|
self.assertEqual(top_fixes, [with_head, no_head])
|
|
name_fixes = d.pop(token.NAME)
|
|
self.assertEqual(name_fixes, [simple, no_head])
|
|
for fixes in d.values():
|
|
self.assertEqual(fixes, [no_head])
|
|
|
|
def test_fixer_loading(self):
|
|
from myfixes.fix_first import FixFirst
|
|
from myfixes.fix_last import FixLast
|
|
from myfixes.fix_parrot import FixParrot
|
|
from myfixes.fix_preorder import FixPreorder
|
|
|
|
rt = self.rt()
|
|
pre, post = rt.get_fixers()
|
|
|
|
self.check_instances(pre, [FixPreorder])
|
|
self.check_instances(post, [FixFirst, FixParrot, FixLast])
|
|
|
|
def test_naughty_fixers(self):
|
|
self.assertRaises(ImportError, self.rt, fixers=["not_here"])
|
|
self.assertRaises(refactor.FixerError, self.rt, fixers=["no_fixer_cls"])
|
|
self.assertRaises(refactor.FixerError, self.rt, fixers=["bad_order"])
|
|
|
|
def test_refactor_string(self):
|
|
rt = self.rt()
|
|
input = "def parrot(): pass\n\n"
|
|
tree = rt.refactor_string(input, "<test>")
|
|
self.assertNotEqual(str(tree), input)
|
|
|
|
input = "def f(): pass\n\n"
|
|
tree = rt.refactor_string(input, "<test>")
|
|
self.assertEqual(str(tree), input)
|
|
|
|
def test_refactor_stdin(self):
|
|
|
|
class MyRT(refactor.RefactoringTool):
|
|
|
|
def print_output(self, old_text, new_text, filename, equal):
|
|
results.extend([old_text, new_text, filename, equal])
|
|
|
|
results = []
|
|
rt = MyRT(_DEFAULT_FIXERS)
|
|
save = sys.stdin
|
|
sys.stdin = io.StringIO("def parrot(): pass\n\n")
|
|
try:
|
|
rt.refactor_stdin()
|
|
finally:
|
|
sys.stdin = save
|
|
expected = ["def parrot(): pass\n\n",
|
|
"def cheese(): pass\n\n",
|
|
"<stdin>", False]
|
|
self.assertEqual(results, expected)
|
|
|
|
def check_file_refactoring(self, test_file, fixers=_2TO3_FIXERS,
|
|
options=None, mock_log_debug=None,
|
|
actually_write=True):
|
|
test_file = self.init_test_file(test_file)
|
|
old_contents = self.read_file(test_file)
|
|
rt = self.rt(fixers=fixers, options=options)
|
|
if mock_log_debug:
|
|
rt.log_debug = mock_log_debug
|
|
|
|
rt.refactor_file(test_file)
|
|
self.assertEqual(old_contents, self.read_file(test_file))
|
|
|
|
if not actually_write:
|
|
return
|
|
rt.refactor_file(test_file, True)
|
|
new_contents = self.read_file(test_file)
|
|
self.assertNotEqual(old_contents, new_contents)
|
|
return new_contents
|
|
|
|
def init_test_file(self, test_file):
|
|
tmpdir = tempfile.mkdtemp(prefix="2to3-test_refactor")
|
|
self.addCleanup(shutil.rmtree, tmpdir)
|
|
shutil.copy(test_file, tmpdir)
|
|
test_file = os.path.join(tmpdir, os.path.basename(test_file))
|
|
os.chmod(test_file, 0o644)
|
|
return test_file
|
|
|
|
def read_file(self, test_file):
|
|
with open(test_file, "rb") as fp:
|
|
return fp.read()
|
|
|
|
def refactor_file(self, test_file, fixers=_2TO3_FIXERS):
|
|
test_file = self.init_test_file(test_file)
|
|
old_contents = self.read_file(test_file)
|
|
rt = self.rt(fixers=fixers)
|
|
rt.refactor_file(test_file, True)
|
|
new_contents = self.read_file(test_file)
|
|
return old_contents, new_contents
|
|
|
|
def test_refactor_file(self):
|
|
test_file = os.path.join(FIXER_DIR, "parrot_example.py")
|
|
self.check_file_refactoring(test_file, _DEFAULT_FIXERS)
|
|
|
|
def test_refactor_file_write_unchanged_file(self):
|
|
test_file = os.path.join(FIXER_DIR, "parrot_example.py")
|
|
debug_messages = []
|
|
def recording_log_debug(msg, *args):
|
|
debug_messages.append(msg % args)
|
|
self.check_file_refactoring(test_file, fixers=(),
|
|
options={"write_unchanged_files": True},
|
|
mock_log_debug=recording_log_debug,
|
|
actually_write=False)
|
|
# Testing that it logged this message when write=False was passed is
|
|
# sufficient to see that it did not bail early after "No changes".
|
|
message_regex = r"Not writing changes to .*%s" % \
|
|
re.escape(os.sep + os.path.basename(test_file))
|
|
for message in debug_messages:
|
|
if "Not writing changes" in message:
|
|
self.assertRegex(message, message_regex)
|
|
break
|
|
else:
|
|
self.fail("%r not matched in %r" % (message_regex, debug_messages))
|
|
|
|
def test_refactor_dir(self):
|
|
def check(structure, expected):
|
|
def mock_refactor_file(self, f, *args):
|
|
got.append(f)
|
|
save_func = refactor.RefactoringTool.refactor_file
|
|
refactor.RefactoringTool.refactor_file = mock_refactor_file
|
|
rt = self.rt()
|
|
got = []
|
|
dir = tempfile.mkdtemp(prefix="2to3-test_refactor")
|
|
try:
|
|
os.mkdir(os.path.join(dir, "a_dir"))
|
|
for fn in structure:
|
|
open(os.path.join(dir, fn), "wb").close()
|
|
rt.refactor_dir(dir)
|
|
finally:
|
|
refactor.RefactoringTool.refactor_file = save_func
|
|
shutil.rmtree(dir)
|
|
self.assertEqual(got,
|
|
[os.path.join(dir, path) for path in expected])
|
|
check([], [])
|
|
tree = ["nothing",
|
|
"hi.py",
|
|
".dumb",
|
|
".after.py",
|
|
"notpy.npy",
|
|
"sappy"]
|
|
expected = ["hi.py"]
|
|
check(tree, expected)
|
|
tree = ["hi.py",
|
|
os.path.join("a_dir", "stuff.py")]
|
|
check(tree, tree)
|
|
|
|
def test_file_encoding(self):
|
|
fn = os.path.join(TEST_DATA_DIR, "different_encoding.py")
|
|
self.check_file_refactoring(fn)
|
|
|
|
def test_false_file_encoding(self):
|
|
fn = os.path.join(TEST_DATA_DIR, "false_encoding.py")
|
|
data = self.check_file_refactoring(fn)
|
|
|
|
def test_bom(self):
|
|
fn = os.path.join(TEST_DATA_DIR, "bom.py")
|
|
data = self.check_file_refactoring(fn)
|
|
self.assertTrue(data.startswith(codecs.BOM_UTF8))
|
|
|
|
def test_crlf_newlines(self):
|
|
old_sep = os.linesep
|
|
os.linesep = "\r\n"
|
|
try:
|
|
fn = os.path.join(TEST_DATA_DIR, "crlf.py")
|
|
fixes = refactor.get_fixers_from_package("lib2to3.fixes")
|
|
self.check_file_refactoring(fn, fixes)
|
|
finally:
|
|
os.linesep = old_sep
|
|
|
|
def test_crlf_unchanged(self):
|
|
fn = os.path.join(TEST_DATA_DIR, "crlf.py")
|
|
old, new = self.refactor_file(fn)
|
|
self.assertIn(b"\r\n", old)
|
|
self.assertIn(b"\r\n", new)
|
|
self.assertNotIn(b"\r\r\n", new)
|
|
|
|
def test_refactor_docstring(self):
|
|
rt = self.rt()
|
|
|
|
doc = """
|
|
>>> example()
|
|
42
|
|
"""
|
|
out = rt.refactor_docstring(doc, "<test>")
|
|
self.assertEqual(out, doc)
|
|
|
|
doc = """
|
|
>>> def parrot():
|
|
... return 43
|
|
"""
|
|
out = rt.refactor_docstring(doc, "<test>")
|
|
self.assertNotEqual(out, doc)
|
|
|
|
def test_explicit(self):
|
|
from myfixes.fix_explicit import FixExplicit
|
|
|
|
rt = self.rt(fixers=["myfixes.fix_explicit"])
|
|
self.assertEqual(len(rt.post_order), 0)
|
|
|
|
rt = self.rt(explicit=["myfixes.fix_explicit"])
|
|
for fix in rt.post_order:
|
|
if isinstance(fix, FixExplicit):
|
|
break
|
|
else:
|
|
self.fail("explicit fixer not loaded")
|