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Viewing changes to bzrlib/tests/test_patches.py

  • Committer: Robert Collins
  • Date: 2005-10-02 22:47:02 UTC
  • mto: This revision was merged to the branch mainline in revision 1397.
  • Revision ID: robertc@robertcollins.net-20051002224701-8a8b20b90de559a6
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bzrlib/tests/test_patches.py
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# Copyright (C) 2004 - 2006 Aaron Bentley
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# <aaron.bentley@utoronto.ca>
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#
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#    This program is free software; you can redistribute it and/or modify
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#    it under the terms of the GNU General Public License as published by
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#    the Free Software Foundation; either version 2 of the License, or
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#    (at your option) any later version.
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#
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#    This program is distributed in the hope that it will be useful,
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#    but WITHOUT ANY WARRANTY; without even the implied warranty of
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#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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#    GNU General Public License for more details.
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#
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#    You should have received a copy of the GNU General Public License
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#    along with this program; if not, write to the Free Software
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#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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import unittest
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import os.path
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from bzrlib.iterablefile import IterableFile
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from bzrlib.patches import (MalformedLine, 
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                            MalformedHunkHeader, 
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                            MalformedPatchHeader, 
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                            ContextLine, 
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                            InsertLine,
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                            RemoveLine, 
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                            difference_index, 
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                            get_patch_names,
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                            hunk_from_header, 
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                            iter_patched, 
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                            parse_line,
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                            parse_patch)
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class PatchesTester(unittest.TestCase):
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    def datafile(self, filename):
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        data_path = os.path.join(os.path.dirname(__file__), 
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                                 "test_patches_data", filename)
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        return file(data_path, "rb")
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43
 
    def testValidPatchHeader(self):
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        """Parse a valid patch header"""
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        lines = "--- orig/commands.py\n+++ mod/dommands.py\n".split('\n')
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        (orig, mod) = get_patch_names(lines.__iter__())
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        assert(orig == "orig/commands.py")
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        assert(mod == "mod/dommands.py")
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50
 
    def testInvalidPatchHeader(self):
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        """Parse an invalid patch header"""
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        lines = "-- orig/commands.py\n+++ mod/dommands.py".split('\n')
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        self.assertRaises(MalformedPatchHeader, get_patch_names,
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                          lines.__iter__())
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56
 
    def testValidHunkHeader(self):
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        """Parse a valid hunk header"""
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        header = "@@ -34,11 +50,6 @@\n"
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        hunk = hunk_from_header(header);
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        assert (hunk.orig_pos == 34)
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        assert (hunk.orig_range == 11)
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        assert (hunk.mod_pos == 50)
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        assert (hunk.mod_range == 6)
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        assert (str(hunk) == header)
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66
 
    def testValidHunkHeader2(self):
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        """Parse a tricky, valid hunk header"""
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        header = "@@ -1 +0,0 @@\n"
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        hunk = hunk_from_header(header);
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        assert (hunk.orig_pos == 1)
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        assert (hunk.orig_range == 1)
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        assert (hunk.mod_pos == 0)
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        assert (hunk.mod_range == 0)
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        assert (str(hunk) == header)
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    def makeMalformed(self, header):
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        self.assertRaises(MalformedHunkHeader, hunk_from_header, header)
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    def testInvalidHeader(self):
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        """Parse an invalid hunk header"""
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        self.makeMalformed(" -34,11 +50,6 \n")
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        self.makeMalformed("@@ +50,6 -34,11 @@\n")
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        self.makeMalformed("@@ -34,11 +50,6 @@")
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        self.makeMalformed("@@ -34.5,11 +50,6 @@\n")
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        self.makeMalformed("@@-34,11 +50,6@@\n")
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        self.makeMalformed("@@ 34,11 50,6 @@\n")
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        self.makeMalformed("@@ -34,11 @@\n")
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        self.makeMalformed("@@ -34,11 +50,6.5 @@\n")
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        self.makeMalformed("@@ -34,11 +50,-6 @@\n")
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    def lineThing(self,text, type):
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        line = parse_line(text)
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        assert(isinstance(line, type))
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        assert(str(line)==text)
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    def makeMalformedLine(self, text):
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        self.assertRaises(MalformedLine, parse_line, text)
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    def testValidLine(self):
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        """Parse a valid hunk line"""
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        self.lineThing(" hello\n", ContextLine)
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        self.lineThing("+hello\n", InsertLine)
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        self.lineThing("-hello\n", RemoveLine)
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    def testMalformedLine(self):
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        """Parse invalid valid hunk lines"""
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        self.makeMalformedLine("hello\n")
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    def compare_parsed(self, patchtext):
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        lines = patchtext.splitlines(True)
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        patch = parse_patch(lines.__iter__())
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        pstr = str(patch)
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        i = difference_index(patchtext, pstr)
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        if i is not None:
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            print "%i: \"%s\" != \"%s\"" % (i, patchtext[i], pstr[i])
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        self.assertEqual (patchtext, str(patch))
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    def testAll(self):
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        """Test parsing a whole patch"""
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        patchtext = self.datafile("patchtext.patch").read()
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        self.compare_parsed(patchtext)
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    def testInit(self):
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        """Handle patches missing half the position, range tuple"""
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        patchtext = \
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"""--- orig/__vavg__.cl
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+++ mod/__vavg__.cl
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@@ -1 +1,2 @@
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 __qbpsbezng__ = "erfgehpgherqgrkg ra"
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+__qbp__ = Na nygreangr Nepu pbzznaqyvar vagresnpr
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"""
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        self.compare_parsed(patchtext)
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    def testLineLookup(self):
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        import sys
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        """Make sure we can accurately look up mod line from orig"""
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        patch = parse_patch(self.datafile("diff"))
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        orig = list(self.datafile("orig"))
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        mod = list(self.datafile("mod"))
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        removals = []
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        for i in range(len(orig)):
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            mod_pos = patch.pos_in_mod(i)
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            if mod_pos is None:
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                removals.append(orig[i])
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                continue
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            assert(mod[mod_pos]==orig[i])
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        rem_iter = removals.__iter__()
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        for hunk in patch.hunks:
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            for line in hunk.lines:
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                if isinstance(line, RemoveLine):
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                    next = rem_iter.next()
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                    if line.contents != next:
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                        sys.stdout.write(" orig:%spatch:%s" % (next,
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                                         line.contents))
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                    assert(line.contents == next)
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        self.assertRaises(StopIteration, rem_iter.next)
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    def testPatching(self):
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        """Test a few patch files, and make sure they work."""
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        files = [
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            ('diff-2', 'orig-2', 'mod-2'),
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            ('diff-3', 'orig-3', 'mod-3'),
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            ('diff-4', 'orig-4', 'mod-4'),
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            ('diff-5', 'orig-5', 'mod-5'),
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            ('diff-6', 'orig-6', 'mod-6'),
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        ]
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        for diff, orig, mod in files:
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            patch = self.datafile(diff)
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            orig_lines = list(self.datafile(orig))
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            mod_lines = list(self.datafile(mod))
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            patched_file = IterableFile(iter_patched(orig_lines, patch))
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            lines = []
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            count = 0
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            for patch_line in patched_file:
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                self.assertEqual(patch_line, mod_lines[count])
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                count += 1
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            self.assertEqual(count, len(mod_lines))
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    def testFirstLineRenumber(self):
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        """Make sure we handle lines at the beginning of the hunk"""
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        patch = parse_patch(self.datafile("insert_top.patch"))
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        assert (patch.pos_in_mod(0)==1)
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def test():
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    patchesTestSuite = unittest.makeSuite(PatchesTester,'test')
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    runner = unittest.TextTestRunner(verbosity=0)
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    return runner.run(patchesTestSuite)
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if __name__ == "__main__":
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    test()