/brz/remove-bazaar

#! /usr/bin/python2.4

# Copyright (C) 2005 by Canonical Ltd

# 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

# TODO: tests regarding version names

"""test suite for weave algorithm"""

import testsweet

from bzrlib.weave import Weave, WeaveFormatError

from bzrlib.weavefile import write_weave, read_weave

from bzrlib.selftest import TestCase

from pprint import pformat

try:

    set

    frozenset

except NameError:

    from sets import Set, ImmutableSet

    set = Set

    frozenset = ImmutableSet

    del Set, ImmutableSet

# texts for use in testing

TEXT_0 = ["Hello world"]

TEXT_1 = ["Hello world",

          "A second line"]

class TestBase(TestCase):

    def check_read_write(self, k):

        """Check the weave k can be written & re-read."""

        from tempfile import TemporaryFile

        tf = TemporaryFile()

        write_weave(k, tf)

        tf.seek(0)

        k2 = read_weave(tf)

        if k != k2:

            tf.seek(0)

            self.log('serialized weave:')

            self.log(tf.read())

            self.log('')

            self.log('parents: %s' % (k._parents == k2._parents))

            self.log('         %r' % k._parents)

            self.log('         %r' % k2._parents)

            self.log('')

            self.fail('read/write check failed')

class Easy(TestBase):

    def runTest(self):

        k = Weave()

class StoreText(TestBase):

    """Store and retrieve a simple text."""

    def runTest(self):

        k = Weave()

        idx = k.add('text0', [], TEXT_0)

        self.assertEqual(k.get(idx), TEXT_0)

        self.assertEqual(idx, 0)

class AnnotateOne(TestBase):

    def runTest(self):

        k = Weave()

        k.add('text0', [], TEXT_0)

        self.assertEqual(k.annotate(0),

                         [(0, TEXT_0[0])])

class StoreTwo(TestBase):

    def runTest(self):

        k = Weave()

        idx = k.add('text0', [], TEXT_0)

        self.assertEqual(idx, 0)

        idx = k.add('text1', [], TEXT_1)

        self.assertEqual(idx, 1)

        self.assertEqual(k.get(0), TEXT_0)

        self.assertEqual(k.get(1), TEXT_1)

class InvalidAdd(TestBase):

    """Try to use invalid version number during add."""

    def runTest(self):

        k = Weave()

        self.assertRaises(IndexError,

                          k.add,

                          'text0',

                          [69],

                          ['new text!'])

class InsertLines(TestBase):

    """Store a revision that adds one line to the original.

    Look at the annotations to make sure that the first line is matched

    and not stored repeatedly."""

    def runTest(self):

        k = Weave()

        k.add('text0', [], ['line 1'])

        k.add('text1', [0], ['line 1', 'line 2'])

        self.assertEqual(k.annotate(0),

                         [(0, 'line 1')])

        self.assertEqual(k.get(1),

                         ['line 1',

                          'line 2'])

        self.assertEqual(k.annotate(1),

                         [(0, 'line 1'),

                          (1, 'line 2')])

        k.add('text2', [0], ['line 1', 'diverged line'])

        self.assertEqual(k.annotate(2),

                         [(0, 'line 1'),

                          (2, 'diverged line')])

        text3 = ['line 1', 'middle line', 'line 2']

        k.add('text3',

              [0, 1],

              text3)

        # self.log("changes to text3: " + pformat(list(k._delta(set([0, 1]), text3))))

        self.log("k._weave=" + pformat(k._weave))

        self.assertEqual(k.annotate(3),

                         [(0, 'line 1'),

                          (3, 'middle line'),

                          (1, 'line 2')])

        # now multiple insertions at different places

        k.add('text4',

              [0, 1, 3],

              ['line 1', 'aaa', 'middle line', 'bbb', 'line 2', 'ccc'])

        self.assertEqual(k.annotate(4), 

                         [(0, 'line 1'),

                          (4, 'aaa'),

                          (3, 'middle line'),

                          (4, 'bbb'),

                          (1, 'line 2'),

                          (4, 'ccc')])

class DeleteLines(TestBase):

    """Deletion of lines from existing text.

    Try various texts all based on a common ancestor."""

    def runTest(self):

        k = Weave()

        base_text = ['one', 'two', 'three', 'four']

        k.add('text0', [], base_text)

        texts = [['one', 'two', 'three'],

                 ['two', 'three', 'four'],

                 ['one', 'four'],

                 ['one', 'two', 'three', 'four'],

                 ]

        i = 1

        for t in texts:

            ver = k.add('text%d' % i,

                        [0], t)

            i += 1

        self.log('final weave:')

        self.log('k._weave=' + pformat(k._weave))

        for i in range(len(texts)):

            self.assertEqual(k.get(i+1),

                             texts[i])

class SuicideDelete(TestBase):

    """Invalid weave which tries to add and delete simultaneously."""

    def runTest(self):

        k = Weave()

        k._parents = [(),

                ]

        k._weave = [('{', 0),

                'first line',

                ('[', 0),

                'deleted in 0',

                (']', 0),

                ('}', 0),

                ]

        ################################### SKIPPED

        # Weave.get doesn't trap this anymore

        return 

        self.assertRaises(WeaveFormatError,

                          k.get,

                          0)        

class CannedDelete(TestBase):

    """Unpack canned weave with deleted lines."""

    def runTest(self):

        k = Weave()

        k._parents = [(),

                frozenset([0]),

                ]

        k._weave = [('{', 0),

                'first line',

                ('[', 1),

                'line to be deleted',

                (']', 1),

                'last line',

                ('}', 0),

                ]

        self.assertEqual(k.get(0),

                         ['first line',

                          'line to be deleted',

                          'last line',

                          ])

        self.assertEqual(k.get(1),

                         ['first line',

                          'last line',

                          ])

class CannedReplacement(TestBase):

    """Unpack canned weave with deleted lines."""

    def runTest(self):

        k = Weave()

        k._parents = [frozenset(),

                frozenset([0]),

                ]

        k._weave = [('{', 0),

                'first line',

                ('[', 1),

                'line to be deleted',

                (']', 1),

                ('{', 1),

                'replacement line',                

                ('}', 1),

                'last line',

                ('}', 0),

                ]

        self.assertEqual(k.get(0),

                         ['first line',

                          'line to be deleted',

                          'last line',

                          ])

        self.assertEqual(k.get(1),

                         ['first line',

                          'replacement line',

                          'last line',

                          ])

class BadWeave(TestBase):

    """Test that we trap an insert which should not occur."""

    def runTest(self):

        k = Weave()

        k._parents = [frozenset(),

                ]

        k._weave = ['bad line',

                ('{', 0),

                'foo {',

                ('{', 1),

                '  added in version 1',

                ('{', 2),

                '  added in v2',

                ('}', 2),

                '  also from v1',

                ('}', 1),

                '}',

                ('}', 0)]

        ################################### SKIPPED

        # Weave.get doesn't trap this anymore

        return 

        self.assertRaises(WeaveFormatError,

                          k.get,

                          0)

class BadInsert(TestBase):

    """Test that we trap an insert which should not occur."""

    def runTest(self):

        k = Weave()

        k._parents = [frozenset(),

                frozenset([0]),

                frozenset([0]),

                frozenset([0,1,2]),

                ]

        k._weave = [('{', 0),

                'foo {',

                ('{', 1),

                '  added in version 1',

                ('{', 1),

                '  more in 1',

                ('}', 1),

                ('}', 1),

                ('}', 0)]

        # this is not currently enforced by get

        return  ##########################################

        self.assertRaises(WeaveFormatError,

                          k.get,

                          0)

        self.assertRaises(WeaveFormatError,

                          k.get,

                          1)

class InsertNested(TestBase):

    """Insertion with nested instructions."""

    def runTest(self):

        k = Weave()

        k._parents = [frozenset(),

                frozenset([0]),

                frozenset([0]),

                frozenset([0,1,2]),

                ]

        k._weave = [('{', 0),

                'foo {',

                ('{', 1),

                '  added in version 1',

                ('{', 2),

                '  added in v2',

                ('}', 2),

                '  also from v1',

                ('}', 1),

                '}',

                ('}', 0)]

        self.assertEqual(k.get(0),

                         ['foo {',

                          '}'])

        self.assertEqual(k.get(1),

                         ['foo {',

                          '  added in version 1',

                          '  also from v1',

                          '}'])

        self.assertEqual(k.get(2),

                         ['foo {',

                          '  added in v2',

                          '}'])

        self.assertEqual(k.get(3),

                         ['foo {',

                          '  added in version 1',

                          '  added in v2',

                          '  also from v1',

                          '}'])

class DeleteLines2(TestBase):

    """Test recording revisions that delete lines.

    This relies on the weave having a way to represent lines knocked

    out by a later revision."""

    def runTest(self):

        k = Weave()

        k.add('text0', [], ["line the first",

                   "line 2",

                   "line 3",

                   "fine"])

        self.assertEqual(len(k.get(0)), 4)

        k.add('text1', [0], ["line the first",

                   "fine"])

        self.assertEqual(k.get(1),

                         ["line the first",

                          "fine"])

        self.assertEqual(k.annotate(1),

                         [(0, "line the first"),

                          (0, "fine")])

class IncludeVersions(TestBase):

    """Check texts that are stored across multiple revisions.

    Here we manually create a weave with particular encoding and make

    sure it unpacks properly.

    Text 0 includes nothing; text 1 includes text 0 and adds some

    lines.

    """

    def runTest(self):

        k = Weave()

        k._parents = [frozenset(), frozenset([0])]

        k._weave = [('{', 0),

                "first line",

                ('}', 0),

                ('{', 1),

                "second line",

                ('}', 1)]

        self.assertEqual(k.get(1),

                         ["first line",

                          "second line"])

        self.assertEqual(k.get(0),

                         ["first line"])

class DivergedIncludes(TestBase):

    """Weave with two diverged texts based on version 0.

    """

    def runTest(self):

        k = Weave()

        k._parents = [frozenset(),

                frozenset([0]),

                frozenset([0]),

                ]

        k._weave = [('{', 0),

                "first line",

                ('}', 0),

                ('{', 1),

                "second line",

                ('}', 1),

                ('{', 2),

                "alternative second line",

                ('}', 2),                

                ]

        self.assertEqual(k.get(0),

                         ["first line"])

        self.assertEqual(k.get(1),

                         ["first line",

                          "second line"])

        self.assertEqual(k.get(2),

                         ["first line",

                          "alternative second line"])

        self.assertEqual(list(k.inclusions([2])),

                         [0, 2])

class ReplaceLine(TestBase):

    def runTest(self):

        k = Weave()

        text0 = ['cheddar', 'stilton', 'gruyere']

        text1 = ['cheddar', 'blue vein', 'neufchatel', 'chevre']

        k.add('text0', [], text0)

        k.add('text1', [0], text1)

        self.log('k._weave=' + pformat(k._weave))

        self.assertEqual(k.get(0), text0)

        self.assertEqual(k.get(1), text1)

class Merge(TestBase):

    """Storage of versions that merge diverged parents"""

    def runTest(self):

        k = Weave()

        texts = [['header'],

                 ['header', '', 'line from 1'],

                 ['header', '', 'line from 2', 'more from 2'],

                 ['header', '', 'line from 1', 'fixup line', 'line from 2'],

                 ]

        k.add('text0', [], texts[0])

        k.add('text1', [0], texts[1])

        k.add('text2', [0], texts[2])

        k.add('merge', [0, 1, 2], texts[3])

        for i, t in enumerate(texts):

            self.assertEqual(k.get(i), t)

        self.assertEqual(k.annotate(3),

                         [(0, 'header'),

                          (1, ''),

                          (1, 'line from 1'),

                          (3, 'fixup line'),

                          (2, 'line from 2'),

                          ])

        self.assertEqual(list(k.inclusions([3])),

                         [0, 1, 2, 3])

        self.log('k._weave=' + pformat(k._weave))

        self.check_read_write(k)

class Conflicts(TestBase):

    """Test detection of conflicting regions during a merge.

    A base version is inserted, then two descendents try to

    insert different lines in the same place.  These should be

    reported as a possible conflict and forwarded to the user."""

    def runTest(self):

        return  # NOT RUN

        k = Weave()

        k.add([], ['aaa', 'bbb'])

        k.add([0], ['aaa', '111', 'bbb'])

        k.add([1], ['aaa', '222', 'bbb'])

        merged = k.merge([1, 2])

        self.assertEquals([[['aaa']],

                           [['111'], ['222']],

                           [['bbb']]])

class NonConflict(TestBase):

    """Two descendants insert compatible changes.

    No conflict should be reported."""

    def runTest(self):

        return  # NOT RUN

        k = Weave()

        k.add([], ['aaa', 'bbb'])

        k.add([0], ['111', 'aaa', 'ccc', 'bbb'])

        k.add([1], ['aaa', 'ccc', 'bbb', '222'])

class AutoMerge(TestBase):

    def runTest(self):

        k = Weave()

        texts = [['header', 'aaa', 'bbb'],

                 ['header', 'aaa', 'line from 1', 'bbb'],

                 ['header', 'aaa', 'bbb', 'line from 2', 'more from 2'],

                 ]

        k.add('text0', [], texts[0])

        k.add('text1', [0], texts[1])

        k.add('text2', [0], texts[2])

        self.log('k._weave=' + pformat(k._weave))

        m = list(k.mash_iter([0, 1, 2]))

        self.assertEqual(m,

                         ['header', 'aaa',

                          'line from 1',

                          'bbb',

                          'line from 2', 'more from 2'])

class Khayyam(TestBase):

    """Test changes to multi-line texts, and read/write"""

    def runTest(self):

        rawtexts = [

            """A Book of Verses underneath the Bough,

            A Jug of Wine, a Loaf of Bread, -- and Thou

            Beside me singing in the Wilderness --

            Oh, Wilderness were Paradise enow!""",

            """A Book of Verses underneath the Bough,

            A Jug of Wine, a Loaf of Bread, -- and Thou

            Beside me singing in the Wilderness --

            Oh, Wilderness were Paradise now!""",

            """A Book of poems underneath the tree,

            A Jug of Wine, a Loaf of Bread,

            and Thou

            Beside me singing in the Wilderness --

            Oh, Wilderness were Paradise now!

            -- O. Khayyam""",

            """A Book of Verses underneath the Bough,

            A Jug of Wine, a Loaf of Bread,

            and Thou

            Beside me singing in the Wilderness --

            Oh, Wilderness were Paradise now!""",

            ]

        texts = [[l.strip() for l in t.split('\n')] for t in rawtexts]

        k = Weave()

        parents = set()

        i = 0

        for t in texts:

            ver = k.add('text%d' % i,

                        list(parents), t)

            parents.add(ver)

            i += 1

        self.log("k._weave=" + pformat(k._weave))

        for i, t in enumerate(texts):

            self.assertEqual(k.get(i), t)

        self.check_read_write(k)

class MergeCases(TestBase):

    def doMerge(self, base, a, b, mp):

        from cStringIO import StringIO

        from textwrap import dedent

        def addcrlf(x):

            return x + '\n'

        w = Weave()

        w.add('text0', [], map(addcrlf, base))

        w.add('text1', [0], map(addcrlf, a))

        w.add('text2', [0], map(addcrlf, b))

        self.log('weave is:')

        tmpf = StringIO()

        write_weave(w, tmpf)

        self.log(tmpf.getvalue())

        self.log('merge plan:')

        p = list(w.plan_merge(1, 2))

        for state, line in p:

            if line:

                self.log('%12s | %s' % (state, line[:-1]))

        self.log('merge:')

        mt = StringIO()

        mt.writelines(w.weave_merge(p))

        mt.seek(0)

        self.log(mt.getvalue())

        mp = map(addcrlf, mp)

        self.assertEqual(mt.readlines(), mp)