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# Copyright (C) 2018 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Tests for the diff and difffull modules."""
import tempfile
from fire import testutils
from examples.diff import diff
from examples.diff import difffull
class DiffTest(testutils.BaseTestCase):
"""The purpose of these tests is to ensure the difflib wrappers works.
It is not the goal of these tests to exhaustively test difflib functionality.
"""
def setUp(self):
self.file1 = file1 = tempfile.NamedTemporaryFile()
self.file2 = file2 = tempfile.NamedTemporaryFile()
file1.write(b'test\ntest1\n')
file2.write(b'test\ntest2\nextraline\n')
file1.flush()
file2.flush()
self.diff = diff.DiffLibWrapper(file1.name, file2.name)
def testSetUp(self):
self.assertEqual(self.diff.fromlines, ['test\n', 'test1\n'])
self.assertEqual(self.diff.tolines, ['test\n', 'test2\n', 'extraline\n'])
def testUnifiedDiff(self):
results = list(self.diff.unified_diff())
self.assertTrue(results[0].startswith('--- ' + self.file1.name))
self.assertTrue(results[1].startswith('+++ ' + self.file2.name))
self.assertEqual(
results[2:],
[
'@@ -1,2 +1,3 @@\n',
' test\n',
'-test1\n',
'+test2\n',
'+extraline\n',
]
)
def testContextDiff(self):
expected_lines = [
'***************\n',
'*** 1,2 ****\n',
' test\n',
'! test1\n',
'--- 1,3 ----\n',
' test\n',
'! test2\n',
'! extraline\n']
results = list(self.diff.context_diff())
self.assertEqual(results[2:], expected_lines)
def testNDiff(self):
expected_lines = [
' test\n',
'- test1\n',
'? ^\n',
'+ test2\n',
'? ^\n',
'+ extraline\n']
results = list(self.diff.ndiff())
self.assertEqual(results, expected_lines)
def testMakeDiff(self):
self.assertTrue(''.join(self.diff.make_file()).startswith('\n<!DOC'))
def testDiffFull(self):
self.assertIsNotNone(difffull)
self.assertIsNotNone(difffull.difflib)
if __name__ == '__main__':
testutils.main()
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