third_party/blink/Tools/Scripts/webkitpy/style/patchreader_unittest.py

# Copyright (C) 2010 Google Inc. All rights reserved.
# Copyright (C) 2009 Torch Mobile Inc.
# Copyright (C) 2009 Apple Inc. All rights reserved.
# Copyright (C) 2010 Chris Jerdonek (chris.jerdonek@gmail.com)
#
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# modification, are permitted provided that the following conditions are
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# notice, this list of conditions and the following disclaimer.
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import unittest

from webkitpy.style.patchreader import PatchReader


class PatchReaderTest(unittest.TestCase):

    class MockTextFileReader(object):

        def __init__(self):
            self.passed_to_process_file = []  # A list of (file_path, line_numbers) pairs.
            self.delete_only_file_count = 0  # A number of times count_delete_only_file() called.

        def process_file(self, file_path, line_numbers):
            self.passed_to_process_file.append((file_path, line_numbers))

        def count_delete_only_file(self):
            self.delete_only_file_count += 1

    def setUp(self):
        self._file_reader = self.MockTextFileReader()

    def _assert_checked(self, passed_to_process_file, delete_only_file_count):
        self.assertEqual(self._file_reader.passed_to_process_file, passed_to_process_file)
        self.assertEqual(self._file_reader.delete_only_file_count, delete_only_file_count)

    def test_check_patch(self):
        PatchReader(self._file_reader).check(
            'diff --git a/__init__.py b/__init__.py\n'
            'index ef65bee..e3db70e 100644\n'
            '--- a/__init__.py\n'
            '+++ b/__init__.py\n'
            '@@ -1,1 +1,2 @@\n'
            ' # Required for Python to search this directory for module files\n'
            '+# New line\n')
        self._assert_checked(
            passed_to_process_file=[('__init__.py', [2])],
            delete_only_file_count=0)

    def test_check_patch_with_deletion(self):
        PatchReader(self._file_reader).check(
            'diff --git a/__init__.py b/__init.py\n'
            'deleted file mode 100644\n'
            'index ef65bee..0000000\n'
            '--- a/__init__.py\n'
            '+++ /dev/null\n'
            '@@ -1 +0,0 @@\n'
            '-foobar\n')
        # The deleted file isn't be processed.
        self._assert_checked(passed_to_process_file=[], delete_only_file_count=1)

    def test_check_patch_with_png_deletion(self):
        PatchReader(self._file_reader).check(
            'diff --git a/foo-expected.png b/foo-expected.png\n'
            'deleted file mode 100644\n'
            'index ef65bee..0000000\n'
            'Binary files a/foo-expected.png and /dev/null differ\n')
        self._assert_checked(passed_to_process_file=[], delete_only_file_count=1)