~bzr-pqm/bzr/bzr.dev

from unittest import TestCase

from bzrlib import tests

import multiparent

LINES_1 = "a\nb\nc\nd\ne\n".splitlines(True)

LINES_2 = "a\nc\nd\ne\n".splitlines(True)

LINES_3 = "a\nb\nc\nd\n".splitlines(True)

class Mock(object):

    def __init__(self, **kwargs):

        self.__dict__ = kwargs

class TestMulti(TestCase):

    def test_compare_no_parent(self):

        diff = multiparent.MultiParent.from_lines(LINES_1)

        self.assertEqual([multiparent.NewText(LINES_1)], diff.hunks)

    def test_compare_one_parent(self):

        diff = multiparent.MultiParent.from_lines(LINES_1, [LINES_2])

        self.assertEqual([multiparent.ParentText(0, 0, 0, 1),

                          multiparent.NewText(['b\n']),

                          multiparent.ParentText(0, 1, 2, 3)],

                         diff.hunks)

    def test_compare_two_parents(self):

        diff = multiparent.MultiParent.from_lines(LINES_1, [LINES_2, LINES_3])

        self.assertEqual([multiparent.ParentText(1, 0, 0, 4),

                          multiparent.ParentText(0, 3, 4, 1)],

                         diff.hunks)

    def test_range_iterator(self):

        diff = multiparent.MultiParent.from_lines(LINES_1, [LINES_2, LINES_3])

        diff.hunks.append(multiparent.NewText(['q\n']))

        self.assertEqual([(0, 4, 'parent', (1, 0, 4)),

                          (4, 5, 'parent', (0, 3, 4)),

                          (5, 6, 'new', ['q\n'])],

                         list(diff.range_iterator()))

    def test_eq(self):

        diff = multiparent.MultiParent.from_lines(LINES_1)

        diff2 = multiparent.MultiParent.from_lines(LINES_1)

        self.assertEqual(diff, diff2)

        diff3 = multiparent.MultiParent.from_lines(LINES_2)

        self.assertFalse(diff == diff3)

        self.assertFalse(diff == Mock(hunks=[multiparent.NewText(LINES_1)]))

        self.assertEqual(multiparent.MultiParent(

                         [multiparent.NewText(LINES_1),

                          multiparent.ParentText(0, 1, 2, 3)]),

                         multiparent.MultiParent(

                         [multiparent.NewText(LINES_1),

                          multiparent.ParentText(0, 1, 2, 3)]))

    def test_to_patch(self):

        self.assertEqual(['i 1\n', 'a\n', '\n', 'c 0 1 2 3\n'],

            list(multiparent.MultiParent([multiparent.NewText(['a\n']),

            multiparent.ParentText(0, 1, 2, 3)]).to_patch()))

    def test_from_patch(self):

        self.assertEqual(multiparent.MultiParent(

            [multiparent.NewText(['a\n']),

             multiparent.ParentText(0, 1, 2, 3)]),

             multiparent.MultiParent.from_patch(

             ['i 1\n', 'a\n', '\n', 'c 0 1 2 3\n']))

        self.assertEqual(multiparent.MultiParent(

            [multiparent.NewText(['a']),

             multiparent.ParentText(0, 1, 2, 3)]),

             multiparent.MultiParent.from_patch(

             ['i 1\n', 'a\n', 'c 0 1 2 3\n']))

    def test_num_lines(self):

        mp = multiparent.MultiParent([multiparent.NewText(['a\n'])])

        self.assertEqual(1, mp.num_lines())

        mp.hunks.append(multiparent.NewText(['b\n', 'c\n']))

        self.assertEqual(3, mp.num_lines())

        mp.hunks.append(multiparent.ParentText(0, 0, 3, 2))

        self.assertEqual(5, mp.num_lines())

        mp.hunks.append(multiparent.NewText(['f\n', 'g\n']))

        self.assertEqual(7, mp.num_lines())

class TestNewText(TestCase):

    def test_eq(self):

        self.assertEqual(multiparent.NewText([]), multiparent.NewText([]))

        self.assertFalse(multiparent.NewText(['a']) ==

                         multiparent.NewText(['b']))

        self.assertFalse(multiparent.NewText(['a']) == Mock(lines=['a']))

    def test_to_patch(self):

        self.assertEqual(['i 0\n', '\n'],

                         list(multiparent.NewText([]).to_patch()))

        self.assertEqual(['i 1\n', 'a', '\n'],

                         list(multiparent.NewText(['a']).to_patch()))

        self.assertEqual(['i 1\n', 'a\n', '\n'],

                         list(multiparent.NewText(['a\n']).to_patch()))

class TestParentText(TestCase):

    def test_eq(self):

        self.assertEqual(multiparent.ParentText(1, 2, 3, 4),

                         multiparent.ParentText(1, 2, 3, 4))

        self.assertFalse(multiparent.ParentText(1, 2, 3, 4) ==

                         multiparent.ParentText(2, 2, 3, 4))

        self.assertFalse(multiparent.ParentText(1, 2, 3, 4) ==

                         Mock(parent=1, parent_pos=2, child_pos=3,

                              num_lines=4))

    def test_to_patch(self):

        self.assertEqual(['c 0 1 2 3\n'],

                         list(multiparent.ParentText(0, 1, 2, 3).to_patch()))

REV_A = ['a\n', 'b\n', 'c\n', 'd\n']

REV_B = ['a\n', 'c\n', 'd\n', 'e\n']

REV_C = ['a\n', 'b\n', 'e\n', 'f\n']

class TestVersionedFile(TestCase):

    def add_version(self, vf, text, version_id, parent_ids):

        vf.add_version([(t+'\n') for t in text], version_id, parent_ids)

    def make_vf(self):

        vf = multiparent.MultiMemoryVersionedFile()

        self.add_version(vf, 'abcd', 'rev-a', [])

        self.add_version(vf, 'acde', 'rev-b', [])

        self.add_version(vf, 'abef', 'rev-c', ['rev-a', 'rev-b'])

        return vf

    def test_add_version(self):

        vf = self.make_vf()

        self.assertEqual(REV_A, vf._lines['rev-a'])

        vf.clear_cache()

        self.assertEqual(vf._lines, {})

    def test_get_line_list(self):

        vf = self.make_vf()

        vf.clear_cache()

        self.assertEqual(REV_A, vf.get_line_list(['rev-a'])[0])

        self.assertEqual([REV_B, REV_C], vf.get_line_list(['rev-b', 'rev-c']))

    @staticmethod

    def reconstruct(vf, revision_id, start, end):

        reconstructor = multiparent._Reconstructor(vf, vf._lines,

                                                   vf._parents)

        lines = []

        reconstructor._reconstruct(lines, revision_id, start, end)

        return lines

    @staticmethod

    def reconstruct_version(vf, revision_id):

        reconstructor = multiparent._Reconstructor(vf, vf._lines,

                                                   vf._parents)

        lines = []

        reconstructor.reconstruct_version(lines, revision_id)

        return lines

    def test_reconstructor(self):

        vf = self.make_vf()

        self.assertEqual(['a\n', 'b\n'], self.reconstruct(vf, 'rev-a',  0, 2))

        self.assertEqual(['c\n', 'd\n'], self.reconstruct(vf, 'rev-a',  2, 4))

        self.assertEqual(['e\n', 'f\n'], self.reconstruct(vf, 'rev-c',  2, 4))

        self.assertEqual(['a\n', 'b\n', 'e\n', 'f\n'],

                          self.reconstruct(vf, 'rev-c',  0, 4))

        self.assertEqual(['a\n', 'b\n', 'e\n', 'f\n'],

                          self.reconstruct_version(vf, 'rev-c'))

    def test_reordered(self):

        """Check for a corner case that requires re-starting the cursor"""

        vf = multiparent.MultiMemoryVersionedFile()

        # rev-b must have at least two hunks, so split a and b with c.

        self.add_version(vf, 'c', 'rev-a', [])

        self.add_version(vf, 'acb', 'rev-b', ['rev-a'])

        # rev-c and rev-d must each have a line from a different rev-b hunk

        self.add_version(vf, 'b', 'rev-c', ['rev-b'])

        self.add_version(vf, 'a', 'rev-d', ['rev-b'])

        # The lines from rev-c and rev-d must appear in the opposite order

        self.add_version(vf, 'ba', 'rev-e', ['rev-c', 'rev-d'])

        vf.clear_cache()

        lines = vf.get_line_list(['rev-e'])[0]

        self.assertEqual(['b\n', 'a\n'], lines)

class TestMultiVersionedFile(tests.TestCaseInTempDir):

    def test_save_load(self):

        vf = multiparent.MultiVersionedFile('foop')

        vf.add_version('a\nb\nc\nd'.splitlines(True), 'a', [])

        vf.add_version('a\ne\nd\n'.splitlines(True), 'b', ['a'])

        vf.save()

        newvf = multiparent.MultiVersionedFile('foop')

        newvf.load()

        self.assertEqual('a\nb\nc\nd', ''.join(newvf.get_line_list(['a'])[0]))

        self.assertEqual('a\ne\nd\n', ''.join(newvf.get_line_list(['b'])[0]))

    def test_filenames(self):

        vf = multiparent.MultiVersionedFile('foop')

        vf.add_version('a\nb\nc\nd'.splitlines(True), 'a', [])

        self.failUnlessExists('foop.mpknit')

        self.failIfExists('foop.mpidx')

        vf.save()

        self.failUnlessExists('foop.mpidx')

        vf.destroy()

        self.failIfExists('foop.mpknit')

        self.failIfExists('foop.mpidx')