def testKeywordDiff(self):
        """Testing parsing SVN diff with keywords"""
        # 'svn cat' will expand special variables in svn:keywords,
        # but 'svn diff' doesn't expand anything.  This causes the
        # patch to fail if those variables appear in the patch context.
        diff = (
            "Index: Makefile\n"
            "==========================================================="
            "========\n"
            "--- Makefile    (revision 4)\n"
            "+++ Makefile    (working copy)\n"
            "@@ -1,6 +1,7 @@\n"
            " # $Id$\n"
            " # $Rev$\n"
            " # $Revision::     $\n"
            "+# foo\n"
            " include ../tools/Makefile.base-vars\n"
            " NAME = misc-docs\n"
            " OUTNAME = svn-misc-docs\n"
        )

        filename = "trunk/doc/misc-docs/Makefile"
        rev = Revision("4")
        file = self.tool.get_file(filename, rev)
        patch(diff, file, filename)

    def testPatch(self):
        """Testing patching"""

        file = 'foo.c'

        old = self._get_file('orig_src', file)
        new = self._get_file('new_src', file)
        diff = self._get_file('diffs', 'unified', 'foo.c.diff')

        patched = diffutils.patch(diff, old, file)
        self.assertEqual(patched, new)

        diff = self._get_file('diffs', 'unified', 'README.diff')
        self.assertRaises(Exception, lambda: diffutils.patch(diff, old, file))

 def testPatchCRLFFileCRDiff(self):
     """Testing patching a CRLF file with a CR diff"""
     old = self._get_file('orig_src', 'README.crlf')
     new = self._get_file('new_src', 'README')
     diff = self._get_file('diffs', 'unified', 'README.diff')
     patched = diffutils.patch(diff, old, new)
     self.assertEqual(patched, new)

 def testPatchFileWithFakeNoNewline(self):
     """Testing patching a file indicating no newline with a trailing \\r"""
     old = self._get_file('orig_src', 'README.nonewline')
     new = self._get_file('new_src', 'README.nonewline')
     diff = self._get_file('diffs', 'unified', 'README.nonewline.diff')
     files = diffparser.DiffParser(diff).parse()
     patched = diffutils.patch(files[0].data, old, new)
     self.assertEqual(diff, files[0].data)
     self.assertEqual(patched, new)

    def test_unterminated_keyword_diff(self):
        """Testing SVN (<backend>) parsing diff with unterminated keywords"""
        diff = (b'Index: Makefile\n'
                b'==========================================================='
                b'========\n'
                b'--- Makefile    (revision 4)\n'
                b'+++ Makefile    (working copy)\n'
                b'@@ -1,6 +1,7 @@\n'
                b' # $Id$\n'
                b' # $Id:\n'
                b' # $Rev$\n'
                b' # $Revision::     $\n'
                b'+# foo\n'
                b' include ../tools/Makefile.base-vars\n'
                b' NAME = misc-docs\n'
                b' OUTNAME = svn-misc-docs\n')

        filename = 'trunk/doc/misc-docs/Makefile'
        rev = Revision('5')
        file = self.tool.get_file(filename, rev)
        patch(diff, file, filename)

    def testUnterminatedKeywordDiff(self):
        """Testing parsing SVN diff with unterminated keywords"""
        diff = "Index: Makefile\n" \
               "===========================================================" \
               "========\n" \
               "--- Makefile    (revision 4)\n" \
               "+++ Makefile    (working copy)\n" \
               "@@ -1,6 +1,7 @@\n" \
               " # $Id$\n" \
               " # $Id:\n" \
               " # $Rev$\n" \
               " # $Revision::     $\n" \
               "+# foo\n" \
               " include ../tools/Makefile.base-vars\n" \
               " NAME = misc-docs\n" \
               " OUTNAME = svn-misc-docs\n"

        filename = 'trunk/doc/misc-docs/Makefile'
        rev = Revision('5')
        file = self.tool.get_file(filename, rev)
        patch(diff, file, filename)

    def test_keyword_diff(self):
        """Testing SVN (<backend>) parsing diff with keywords"""
        # 'svn cat' will expand special variables in svn:keywords,
        # but 'svn diff' doesn't expand anything.  This causes the
        # patch to fail if those variables appear in the patch context.
        diff = (b'Index: Makefile\n'
                b'==========================================================='
                b'========\n'
                b'--- Makefile    (revision 4)\n'
                b'+++ Makefile    (working copy)\n'
                b'@@ -1,6 +1,7 @@\n'
                b' # $Id$\n'
                b' # $Rev$\n'
                b' # $Revision::     $\n'
                b'+# foo\n'
                b' include ../tools/Makefile.base-vars\n'
                b' NAME = misc-docs\n'
                b' OUTNAME = svn-misc-docs\n')

        filename = 'trunk/doc/misc-docs/Makefile'
        rev = Revision('4')
        file = self.tool.get_file(filename, rev)
        patch(diff, file, filename)

 def testEmptyPatch(self):
     """Testing patching with an empty diff"""
     old = 'This is a test'
     diff = ''
     patched = diffutils.patch(diff, old, 'test.c')
     self.assertEqual(patched, old)