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test_unify.py
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#!/usr/bin/env python
"""Test suite for unify."""
from __future__ import unicode_literals
import contextlib
import io
import tempfile
try:
# Python 2.6
import unittest2 as unittest
except ImportError:
import unittest
import unify
class TestUnits(unittest.TestCase):
def test_unify_quotes(self):
self.assertEqual("'foo'",
unify.unify_quotes('"foo"',
preferred_quote="'"))
self.assertEqual('"foo"',
unify.unify_quotes('"foo"',
preferred_quote='"'))
self.assertEqual('"foo"',
unify.unify_quotes("'foo'",
preferred_quote='"'))
def test_unify_quotes_should_avoid_some_cases(self):
self.assertEqual('''"foo's"''',
unify.unify_quotes('''"foo's"''',
preferred_quote="'"))
self.assertEqual('''"""foo"""''',
unify.unify_quotes('''"""foo"""''',
preferred_quote="'"))
def test_detect_encoding_with_bad_encoding(self):
with temporary_file('# -*- coding: blah -*-\n') as filename:
self.assertEqual('latin-1',
unify.detect_encoding(filename))
def test_format_code(self):
self.assertEqual("x = 'abc' \\\n'next'\n",
unify.format_code('x = "abc" \\\n"next"\n',
preferred_quote="'"))
def test_format_code_with_backslash_in_comment(self):
self.assertEqual("x = 'abc' #\\\n'next'\n",
unify.format_code('x = "abc" #\\\n"next"\n',
preferred_quote="'"))
def test_format_code_with_syntax_error(self):
self.assertEqual('foo("abc"\n',
unify.format_code('foo("abc"\n',
preferred_quote="'"))
class TestUnitsWithFstrings(unittest.TestCase):
""" Tests for python >= 3.6 fstring handling."""
def test_unify_quotes(self):
self.assertEqual("f'foo'",
unify.unify_quotes('f"foo"',
preferred_quote="'"))
self.assertEqual('f"foo"',
unify.unify_quotes('f"foo"',
preferred_quote='"'))
self.assertEqual('f"foo"',
unify.unify_quotes("f'foo'",
preferred_quote='"'))
def test_unify_quotes_should_avoid_some_cases(self):
self.assertEqual('''f"foo's"''',
unify.unify_quotes('''f"foo's"''',
preferred_quote="'"))
self.assertEqual('''f"""foo"""''',
unify.unify_quotes('''f"""foo"""''',
preferred_quote="'"))
def test_format_code(self):
self.assertEqual("x = f'abc' \\\nf'next'\n",
unify.format_code('x = f"abc" \\\nf"next"\n',
preferred_quote="'"))
def test_format_code_with_backslash_in_comment(self):
self.assertEqual("x = f'abc' #\\\nf'next'\n",
unify.format_code('x = f"abc" #\\\nf"next"\n',
preferred_quote="'"))
def test_format_code_with_syntax_error(self):
self.assertEqual('foo(f"abc"\n',
unify.format_code('foo(f"abc"\n',
preferred_quote="'"))
class TestUnitsWithRawStrings(unittest.TestCase):
"""Test for r-prefix raw string handling."""
def test_unify_quotes(self):
self.assertEqual("r'foo'",
unify.unify_quotes('r"foo"',
preferred_quote="'"))
self.assertEqual('r"foo"',
unify.unify_quotes('r"foo"',
preferred_quote='"'))
self.assertEqual('r"foo"',
unify.unify_quotes("r'foo'",
preferred_quote='"'))
def test_unify_quotes_should_avoid_some_cases(self):
self.assertEqual('''r"foo's"''',
unify.unify_quotes('''r"foo's"''',
preferred_quote="'"))
self.assertEqual('''r"""\\t"""''',
unify.unify_quotes('''r"""\\t"""''',
preferred_quote="'"))
def test_format_code(self):
self.assertEqual("x = r'abc' \\\nr'next'\n",
unify.format_code('x = r"abc" \\\nr"next"\n',
preferred_quote="'"))
def test_format_code_with_backslash_in_comment(self):
self.assertEqual("x = r'abc' #\\\nr'next'\n",
unify.format_code('x = r"abc" #\\\nr"next"\n',
preferred_quote="'"))
def test_format_code_with_syntax_error(self):
self.assertEqual('foo(r"Tabs \t, new lines \n."\n',
unify.format_code('foo(r"Tabs \t, new lines \n."\n',
preferred_quote="'"))
class TestUnitsWithUnicodeStrings(unittest.TestCase):
"""Test for u-prefix unicode string handling."""
def test_unify_quotes(self):
self.assertEqual("u'foo'",
unify.unify_quotes('u"foo"',
preferred_quote="'"))
self.assertEqual('u"foo"',
unify.unify_quotes('u"foo"',
preferred_quote='"'))
self.assertEqual('u"foo"',
unify.unify_quotes("u'foo'",
preferred_quote='"'))
def test_unify_quotes_should_avoid_some_cases(self):
self.assertEqual('''u"foo's"''',
unify.unify_quotes('''u"foo's"''',
preferred_quote="'"))
self.assertEqual('''u"""foo"""''',
unify.unify_quotes('''u"""foo"""''',
preferred_quote="'"))
def test_format_code(self):
self.assertEqual("x = u'abc' \\\nu'next'\n",
unify.format_code('x = u"abc" \\\nu"next"\n',
preferred_quote="'"))
def test_format_code_with_backslash_in_comment(self):
self.assertEqual("x = u'abc' #\\\nu'next'\n",
unify.format_code('x = u"abc" #\\\nu"next"\n',
preferred_quote="'"))
def test_format_code_with_syntax_error(self):
self.assertEqual('foo(u"abc"\n',
unify.format_code('foo(u"abc"\n',
preferred_quote="'"))
class TestUnitsWithByteStrings(unittest.TestCase):
""" Tests for python3 byte string handling."""
def test_unify_quotes(self):
self.assertEqual("b'foo'",
unify.unify_quotes('b"foo"',
preferred_quote="'"))
self.assertEqual('b"foo"',
unify.unify_quotes('b"foo"',
preferred_quote='"'))
self.assertEqual('b"foo"',
unify.unify_quotes("b'foo'",
preferred_quote='"'))
def test_unify_quotes_should_avoid_some_cases(self):
self.assertEqual('''b"foo's"''',
unify.unify_quotes('''b"foo's"''',
preferred_quote="'"))
self.assertEqual('''b"""foo"""''',
unify.unify_quotes('''b"""foo"""''',
preferred_quote="'"))
def test_format_code(self):
self.assertEqual("x = b'abc' \\\nb'next'\n",
unify.format_code('x = b"abc" \\\nb"next"\n',
preferred_quote="'"))
def test_format_code_with_backslash_in_comment(self):
self.assertEqual("x = b'abc' #\\\nb'next'\n",
unify.format_code('x = b"abc" #\\\nb"next"\n',
preferred_quote="'"))
def test_format_code_with_syntax_error(self):
self.assertEqual('foo(b"abc"\n',
unify.format_code('foo(b"abc"\n',
preferred_quote="'"))
class TestSystem(unittest.TestCase):
def test_diff(self):
with temporary_file('''\
if True:
x = "abc"
''') as filename:
output_file = io.StringIO()
self.assertEqual(
unify._main(argv=['my_fake_program', filename],
standard_out=output_file,
standard_error=None),
None,
)
self.assertEqual('''\
@@ -1,2 +1,2 @@
if True:
- x = "abc"
+ x = 'abc'
''', '\n'.join(output_file.getvalue().split('\n')[2:]))
def test_check_only(self):
with temporary_file('''\
if True:
x = "abc"
''') as filename:
output_file = io.StringIO()
self.assertEqual(
unify._main(argv=['my_fake_program', '--check-only', filename],
standard_out=output_file,
standard_error=None),
1,
)
self.assertEqual('''\
@@ -1,2 +1,2 @@
if True:
- x = "abc"
+ x = 'abc'
''', '\n'.join(output_file.getvalue().split('\n')[2:]))
def test_diff_with_empty_file(self):
with temporary_file('') as filename:
output_file = io.StringIO()
unify._main(argv=['my_fake_program', filename],
standard_out=output_file,
standard_error=None)
self.assertEqual(
'',
output_file.getvalue())
def test_diff_with_missing_file(self):
output_file = io.StringIO()
non_existent_filename = '/non_existent_file_92394492929'
self.assertEqual(
1,
unify._main(argv=['my_fake_program',
'/non_existent_file_92394492929'],
standard_out=None,
standard_error=output_file))
self.assertIn(non_existent_filename, output_file.getvalue())
def test_in_place(self):
with temporary_file('''\
if True:
x = "abc"
''') as filename:
output_file = io.StringIO()
self.assertEqual(
unify._main(argv=['my_fake_program', '--in-place', filename],
standard_out=output_file,
standard_error=None),
None,
)
with open(filename) as f:
self.assertEqual('''\
if True:
x = 'abc'
''', f.read())
def test_in_place_precedence_over_check_only(self):
with temporary_file('''\
if True:
x = "abc"
''') as filename:
output_file = io.StringIO()
self.assertEqual(
unify._main(argv=['my_fake_program',
'--in-place',
'--check-only',
filename],
standard_out=output_file,
standard_error=None),
None,
)
with open(filename) as f:
self.assertEqual('''\
if True:
x = 'abc'
''', f.read())
def test_ignore_hidden_directories(self):
with temporary_directory() as directory:
with temporary_directory(prefix='.',
directory=directory) as inner_directory:
with temporary_file("""\
if True:
x = "abc"
""", directory=inner_directory):
output_file = io.StringIO()
self.assertEqual(
unify._main(argv=['my_fake_program',
'--recursive',
directory],
standard_out=output_file,
standard_error=None),
None,
)
self.assertEqual(
'',
output_file.getvalue().strip())
@contextlib.contextmanager
def temporary_file(contents, directory='.', prefix=''):
"""Write contents to temporary file and yield it."""
f = tempfile.NamedTemporaryFile(suffix='.py', prefix=prefix,
delete=False, dir=directory)
try:
f.write(contents.encode())
f.close()
yield f.name
finally:
import os
os.remove(f.name)
@contextlib.contextmanager
def temporary_directory(directory='.', prefix=''):
"""Create temporary directory and yield its path."""
temp_directory = tempfile.mkdtemp(prefix=prefix, dir=directory)
try:
yield temp_directory
finally:
import shutil
shutil.rmtree(temp_directory)
if __name__ == '__main__':
unittest.main()