~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2004 - 2008 Aaron Bentley, Canonical Ltd

# <aaron.bentley@utoronto.ca>

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

import os.path

from bzrlib.tests import TestCase

from bzrlib.iterablefile import IterableFile

from bzrlib.patches import (MalformedLine,

                            MalformedHunkHeader,

                            MalformedPatchHeader,

                            ContextLine,

                            InsertLine,

                            RemoveLine,

                            difference_index,

                            get_patch_names,

                            hunk_from_header,

                            iter_patched,

                            iter_patched_from_hunks,

                            parse_line,

                            parse_patch,

                            parse_patches,

                            NO_NL)

class PatchesTester(TestCase):

    def datafile(self, filename):

        data_path = os.path.join(os.path.dirname(__file__),

                                 "test_patches_data", filename)

        return file(data_path, "rb")

    def testValidPatchHeader(self):

        """Parse a valid patch header"""

        lines = "--- orig/commands.py\n+++ mod/dommands.py\n".split('\n')

        (orig, mod) = get_patch_names(lines.__iter__())

        self.assertEqual(orig, "orig/commands.py")

        self.assertEqual(mod, "mod/dommands.py")

    def testInvalidPatchHeader(self):

        """Parse an invalid patch header"""

        lines = "-- orig/commands.py\n+++ mod/dommands.py".split('\n')

        self.assertRaises(MalformedPatchHeader, get_patch_names,

                          lines.__iter__())

    def testValidHunkHeader(self):

        """Parse a valid hunk header"""

        header = "@@ -34,11 +50,6 @@\n"

        hunk = hunk_from_header(header);

        self.assertEqual(hunk.orig_pos, 34)

        self.assertEqual(hunk.orig_range, 11)

        self.assertEqual(hunk.mod_pos, 50)

        self.assertEqual(hunk.mod_range, 6)

        self.assertEqual(str(hunk), header)

    def testValidHunkHeader2(self):

        """Parse a tricky, valid hunk header"""

        header = "@@ -1 +0,0 @@\n"

        hunk = hunk_from_header(header);

        self.assertEqual(hunk.orig_pos, 1)

        self.assertEqual(hunk.orig_range, 1)

        self.assertEqual(hunk.mod_pos, 0)

        self.assertEqual(hunk.mod_range, 0)

        self.assertEqual(str(hunk), header)

    def testPDiff(self):

        """Parse a hunk header produced by diff -p"""

        header = "@@ -407,7 +292,7 @@ bzr 0.18rc1  2007-07-10\n"

        hunk = hunk_from_header(header)

        self.assertEqual('bzr 0.18rc1  2007-07-10', hunk.tail)

        self.assertEqual(header, str(hunk))

    def makeMalformed(self, header):

        self.assertRaises(MalformedHunkHeader, hunk_from_header, header)

    def testInvalidHeader(self):

        """Parse an invalid hunk header"""

        self.makeMalformed(" -34,11 +50,6 \n")

        self.makeMalformed("@@ +50,6 -34,11 @@\n")

        self.makeMalformed("@@ -34,11 +50,6 @@")

        self.makeMalformed("@@ -34.5,11 +50,6 @@\n")

        self.makeMalformed("@@-34,11 +50,6@@\n")

        self.makeMalformed("@@ 34,11 50,6 @@\n")

        self.makeMalformed("@@ -34,11 @@\n")

        self.makeMalformed("@@ -34,11 +50,6.5 @@\n")

        self.makeMalformed("@@ -34,11 +50,-6 @@\n")

    def lineThing(self,text, type):

        line = parse_line(text)

        self.assertIsInstance(line, type)

        self.assertEqual(str(line), text)

    def makeMalformedLine(self, text):

        self.assertRaises(MalformedLine, parse_line, text)

    def testValidLine(self):

        """Parse a valid hunk line"""

        self.lineThing(" hello\n", ContextLine)

        self.lineThing("+hello\n", InsertLine)

        self.lineThing("-hello\n", RemoveLine)

    def testMalformedLine(self):

        """Parse invalid valid hunk lines"""

        self.makeMalformedLine("hello\n")

    def testMalformedLineNO_NL(self):

        """Parse invalid '\ No newline at end of file' in hunk lines"""

        self.makeMalformedLine(NO_NL)

    def compare_parsed(self, patchtext):

        lines = patchtext.splitlines(True)

        patch = parse_patch(lines.__iter__())

        pstr = str(patch)

        i = difference_index(patchtext, pstr)

        if i is not None:

            print "%i: \"%s\" != \"%s\"" % (i, patchtext[i], pstr[i])

        self.assertEqual (patchtext, str(patch))

    def testAll(self):

        """Test parsing a whole patch"""

        patchtext = self.datafile("patchtext.patch").read()

        self.compare_parsed(patchtext)

    def testInit(self):

        """Handle patches missing half the position, range tuple"""

        patchtext = \

"""--- orig/__vavg__.cl

+++ mod/__vavg__.cl

@@ -1 +1,2 @@

 __qbpsbezng__ = "erfgehpgherqgrkg ra"

+__qbp__ = Na nygreangr Nepu pbzznaqyvar vagresnpr

"""

        self.compare_parsed(patchtext)

    def testLineLookup(self):

        import sys

        """Make sure we can accurately look up mod line from orig"""

        patch = parse_patch(self.datafile("diff"))

        orig = list(self.datafile("orig"))

        mod = list(self.datafile("mod"))

        removals = []

        for i in range(len(orig)):

            mod_pos = patch.pos_in_mod(i)

            if mod_pos is None:

                removals.append(orig[i])

                continue

            self.assertEqual(mod[mod_pos], orig[i])

        rem_iter = removals.__iter__()

        for hunk in patch.hunks:

            for line in hunk.lines:

                if isinstance(line, RemoveLine):

                    next = rem_iter.next()

                    if line.contents != next:

                        sys.stdout.write(" orig:%spatch:%s" % (next,

                                         line.contents))

                    self.assertEqual(line.contents, next)

        self.assertRaises(StopIteration, rem_iter.next)

    def testPatching(self):

        """Test a few patch files, and make sure they work."""

        files = [

            ('diff-2', 'orig-2', 'mod-2'),

            ('diff-3', 'orig-3', 'mod-3'),

            ('diff-4', 'orig-4', 'mod-4'),

            ('diff-5', 'orig-5', 'mod-5'),

            ('diff-6', 'orig-6', 'mod-6'),

            ('diff-7', 'orig-7', 'mod-7'),

        ]

        for diff, orig, mod in files:

            patch = self.datafile(diff)

            orig_lines = list(self.datafile(orig))

            mod_lines = list(self.datafile(mod))

            patched_file = IterableFile(iter_patched(orig_lines, patch))

            lines = []

            count = 0

            for patch_line in patched_file:

                self.assertEqual(patch_line, mod_lines[count])

                count += 1

            self.assertEqual(count, len(mod_lines))

    def test_iter_patched_from_hunks(self):

        """Test a few patch files, and make sure they work."""

        files = [

            ('diff-2', 'orig-2', 'mod-2'),

            ('diff-3', 'orig-3', 'mod-3'),

            ('diff-4', 'orig-4', 'mod-4'),

            ('diff-5', 'orig-5', 'mod-5'),

            ('diff-6', 'orig-6', 'mod-6'),

            ('diff-7', 'orig-7', 'mod-7'),

        ]

        for diff, orig, mod in files:

            parsed = parse_patch(self.datafile(diff))

            orig_lines = list(self.datafile(orig))

            mod_lines = list(self.datafile(mod))

            iter_patched = iter_patched_from_hunks(orig_lines, parsed.hunks)

            patched_file = IterableFile(iter_patched)

            lines = []

            count = 0

            for patch_line in patched_file:

                self.assertEqual(patch_line, mod_lines[count])

                count += 1

            self.assertEqual(count, len(mod_lines))

    def testFirstLineRenumber(self):

        """Make sure we handle lines at the beginning of the hunk"""

        patch = parse_patch(self.datafile("insert_top.patch"))

        self.assertEqual(patch.pos_in_mod(0), 1)

    def testParsePatches(self):

        """Make sure file names can be extracted from tricky unified diffs"""

        patchtext = \

"""--- orig-7

+++ mod-7

@@ -1,10 +1,10 @@

 -- a

--- b

+++ c

 xx d

 xx e

 ++ f

-++ g

+-- h

 xx i

 xx j

 -- k

--- l

+++ m

--- orig-8

+++ mod-8

@@ -1 +1 @@

--- A

+++ B

@@ -1 +1 @@

--- C

+++ D

"""

        filenames = [('orig-7', 'mod-7'),

                     ('orig-8', 'mod-8')]

        patches = parse_patches(patchtext.splitlines(True))

        patch_files = []

        for patch in patches:

            patch_files.append((patch.oldname, patch.newname))

        self.assertEqual(patch_files, filenames)

    def testStatsValues(self):

        """Test the added, removed and hunks values for stats_values."""

        patch = parse_patch(self.datafile("diff"))

        self.assertEqual((299, 407, 48), patch.stats_values())