~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2006-2012 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Black-box tests for bzr diff."""

import os

import re

from bzrlib import (

    tests,

    workingtree,

    )

from bzrlib.diff import (

    DiffTree,

    format_registry as diff_format_registry,

    )

from bzrlib.tests import (

    features,

    )

def subst_dates(string):

    """Replace date strings with constant values."""

    return re.sub(r'\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2} [-\+]\d{4}',

                  'YYYY-MM-DD HH:MM:SS +ZZZZ', string)

class DiffBase(tests.TestCaseWithTransport):

    """Base class with common setup method"""

    def make_example_branch(self):

        tree = self.make_branch_and_tree('.')

        self.build_tree_contents([

            ('hello', 'foo\n'),

            ('goodbye', 'baz\n')])

        tree.add(['hello'])

        tree.commit('setup')

        tree.add(['goodbye'])

        tree.commit('setup')

        return tree

class TestDiff(DiffBase):

    def test_diff(self):

        tree = self.make_example_branch()

        self.build_tree_contents([('hello', 'hello world!')])

        tree.commit(message='fixing hello')

        output = self.run_bzr('diff -r 2..3', retcode=1)[0]

        self.assert_('\n+hello world!' in output)

        output = self.run_bzr('diff -c 3', retcode=1)[0]

        self.assert_('\n+hello world!' in output)

        output = self.run_bzr('diff -r last:3..last:1', retcode=1)[0]

        self.assert_('\n+baz' in output)

        output = self.run_bzr('diff -c last:2', retcode=1)[0]

        self.assert_('\n+baz' in output)

        self.build_tree(['moo'])

        tree.add('moo')

        os.unlink('moo')

        self.run_bzr('diff')

    def test_diff_prefix(self):

        """diff --prefix appends to filenames in output"""

        self.make_example_branch()

        self.build_tree_contents([('hello', 'hello world!\n')])

        out, err = self.run_bzr('diff --prefix old/:new/', retcode=1)

        self.assertEquals(err, '')

        self.assertEqualDiff(subst_dates(out), '''\

=== modified file 'hello'

--- old/hello\tYYYY-MM-DD HH:MM:SS +ZZZZ

+++ new/hello\tYYYY-MM-DD HH:MM:SS +ZZZZ

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

-foo

+hello world!

''')

    def test_diff_illegal_prefix_value(self):

        # There was an error in error reporting for this option

        out, err = self.run_bzr('diff --prefix old/', retcode=3)

        self.assertContainsRe(err,

            '--prefix expects two values separated by a colon')

    def test_diff_p1(self):

        """diff -p1 produces lkml-style diffs"""

        self.make_example_branch()

        self.build_tree_contents([('hello', 'hello world!\n')])

        out, err = self.run_bzr('diff -p1', retcode=1)

        self.assertEquals(err, '')

        self.assertEqualDiff(subst_dates(out), '''\

=== modified file 'hello'

--- old/hello\tYYYY-MM-DD HH:MM:SS +ZZZZ

+++ new/hello\tYYYY-MM-DD HH:MM:SS +ZZZZ

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

-foo

+hello world!

''')

    def test_diff_p0(self):

        """diff -p0 produces diffs with no prefix"""

        self.make_example_branch()

        self.build_tree_contents([('hello', 'hello world!\n')])

        out, err = self.run_bzr('diff -p0', retcode=1)

        self.assertEquals(err, '')

        self.assertEqualDiff(subst_dates(out), '''\

=== modified file 'hello'

--- hello\tYYYY-MM-DD HH:MM:SS +ZZZZ

+++ hello\tYYYY-MM-DD HH:MM:SS +ZZZZ

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

-foo

+hello world!

''')

    def test_diff_nonexistent(self):

        # Get an error from a file that does not exist at all

        # (Malone #3619)

        self.make_example_branch()

        out, err = self.run_bzr('diff does-not-exist', retcode=3,

            error_regexes=('not versioned.*does-not-exist',))

    def test_diff_illegal_revision_specifiers(self):

        out, err = self.run_bzr('diff -r 1..23..123', retcode=3,

            error_regexes=('one or two revision specifiers',))

    def test_diff_using_and_format(self):

        out, err = self.run_bzr('diff --format=default --using=mydi', retcode=3,

            error_regexes=('are mutually exclusive',))

    def test_diff_nonexistent_revision(self):

        out, err = self.run_bzr('diff -r 123', retcode=3,

            error_regexes=("Requested revision: '123' does not "

                "exist in branch:",))

    def test_diff_nonexistent_dotted_revision(self):

        out, err = self.run_bzr('diff -r 1.1', retcode=3)

        self.assertContainsRe(err,

            "Requested revision: '1.1' does not exist in branch:")

    def test_diff_nonexistent_dotted_revision_change(self):

        out, err = self.run_bzr('diff -c 1.1', retcode=3)

        self.assertContainsRe(err,

            "Requested revision: '1.1' does not exist in branch:")

    def test_diff_unversioned(self):

        # Get an error when diffing a non-versioned file.

        # (Malone #3619)

        self.make_example_branch()

        self.build_tree(['unversioned-file'])

        out, err = self.run_bzr('diff unversioned-file', retcode=3)

        self.assertContainsRe(err, 'not versioned.*unversioned-file')

    # TODO: What should diff say for a file deleted in working tree?

    def example_branches(self):

        branch1_tree = self.make_branch_and_tree('branch1')

        self.build_tree(['branch1/file'], line_endings='binary')

        self.build_tree(['branch1/file2'], line_endings='binary')

        branch1_tree.add('file')

        branch1_tree.add('file2')

        branch1_tree.commit(message='add file and file2')

        branch2_tree = branch1_tree.bzrdir.sprout('branch2').open_workingtree()

        self.build_tree_contents([('branch2/file', 'new content\n')])

        branch2_tree.commit(message='update file')

        return branch1_tree, branch2_tree

    def check_b2_vs_b1(self, cmd):

        # Compare branch2 vs branch1 using cmd and check the result

        out, err = self.run_bzr(cmd, retcode=1)

        self.assertEquals('', err)

        self.assertEquals("=== modified file 'file'\n"

                          "--- file\tYYYY-MM-DD HH:MM:SS +ZZZZ\n"

                          "+++ file\tYYYY-MM-DD HH:MM:SS +ZZZZ\n"

                          "@@ -1,1 +1,1 @@\n"

                          "-new content\n"

                          "+contents of branch1/file\n"

                          "\n", subst_dates(out))

    def check_b1_vs_b2(self, cmd):

        # Compare branch1 vs branch2 using cmd and check the result

        out, err = self.run_bzr(cmd, retcode=1)

        self.assertEquals('', err)

        self.assertEqualDiff("=== modified file 'file'\n"

                              "--- file\tYYYY-MM-DD HH:MM:SS +ZZZZ\n"

                              "+++ file\tYYYY-MM-DD HH:MM:SS +ZZZZ\n"

                              "@@ -1,1 +1,1 @@\n"

                              "-contents of branch1/file\n"

                              "+new content\n"

                              "\n", subst_dates(out))

    def check_no_diffs(self, cmd):

        # Check that running cmd returns an empty diff

        out, err = self.run_bzr(cmd, retcode=0)

        self.assertEquals('', err)

        self.assertEquals('', out)

    def test_diff_branches(self):

        self.example_branches()

        # should open branch1 and diff against branch2,

        self.check_b2_vs_b1('diff -r branch:branch2 branch1')

        # Compare two working trees using various syntax forms

        self.check_b2_vs_b1('diff --old branch2 --new branch1')

        self.check_b2_vs_b1('diff --old branch2 branch1')

        self.check_b2_vs_b1('diff branch2 --new branch1')

        # Test with a selected file that was changed

        self.check_b2_vs_b1('diff --old branch2 --new branch1 file')

        self.check_b2_vs_b1('diff --old branch2 branch1/file')

        self.check_b2_vs_b1('diff branch2/file --new branch1')

        # Test with a selected file that was not changed

        self.check_no_diffs('diff --old branch2 --new branch1 file2')

        self.check_no_diffs('diff --old branch2 branch1/file2')

        self.check_no_diffs('diff branch2/file2 --new branch1')

    def test_diff_branches_no_working_trees(self):

        branch1_tree, branch2_tree = self.example_branches()

        # Compare a working tree to a branch without a WT

        dir1 = branch1_tree.bzrdir

        dir1.destroy_workingtree()

        self.assertFalse(dir1.has_workingtree())

        self.check_b2_vs_b1('diff --old branch2 --new branch1')

        self.check_b2_vs_b1('diff --old branch2 branch1')

        self.check_b2_vs_b1('diff branch2 --new branch1')

        # Compare a branch without a WT to one with a WT

        self.check_b1_vs_b2('diff --old branch1 --new branch2')

        self.check_b1_vs_b2('diff --old branch1 branch2')

        self.check_b1_vs_b2('diff branch1 --new branch2')

        # Compare a branch with a WT against another without a WT

        dir2 = branch2_tree.bzrdir

        dir2.destroy_workingtree()

        self.assertFalse(dir2.has_workingtree())

        self.check_b1_vs_b2('diff --old branch1 --new branch2')

        self.check_b1_vs_b2('diff --old branch1 branch2')

        self.check_b1_vs_b2('diff branch1 --new branch2')

    def test_diff_revno_branches(self):

        self.example_branches()

        branch2_tree = workingtree.WorkingTree.open_containing('branch2')[0]

        self.build_tree_contents([('branch2/file', 'even newer content')])

        branch2_tree.commit(message='update file once more')

        out, err = self.run_bzr('diff -r revno:1:branch2..revno:1:branch1',

                                )

        self.assertEquals('', err)

        self.assertEquals('', out)

        out, err = self.run_bzr('diff -r revno:2:branch2..revno:1:branch1',

                                retcode=1)

        self.assertEquals('', err)

        self.assertEqualDiff("=== modified file 'file'\n"

                              "--- file\tYYYY-MM-DD HH:MM:SS +ZZZZ\n"

                              "+++ file\tYYYY-MM-DD HH:MM:SS +ZZZZ\n"

                              "@@ -1,1 +1,1 @@\n"

                              "-new content\n"

                              "+contents of branch1/file\n"

                              "\n", subst_dates(out))

    def example_branch2(self):

        branch1_tree = self.make_branch_and_tree('branch1')

        self.build_tree_contents([('branch1/file1', 'original line\n')])

        branch1_tree.add('file1')

        branch1_tree.commit(message='first commit')

        self.build_tree_contents([('branch1/file1', 'repo line\n')])

        branch1_tree.commit(message='second commit')

        return branch1_tree

    def test_diff_to_working_tree(self):

        self.example_branch2()

        self.build_tree_contents([('branch1/file1', 'new line')])

        output = self.run_bzr('diff -r 1.. branch1', retcode=1)

        self.assertContainsRe(output[0], '\n\\-original line\n\\+new line\n')

    def test_diff_to_working_tree_in_subdir(self):

        self.example_branch2()

        self.build_tree_contents([('branch1/file1', 'new line')])

        os.mkdir('branch1/dir1')

        output = self.run_bzr('diff -r 1..', retcode=1,

                              working_dir='branch1/dir1')

        self.assertContainsRe(output[0], '\n\\-original line\n\\+new line\n')

    def test_diff_across_rename(self):

        """The working tree path should always be considered for diffing"""

        tree = self.make_example_branch()

        self.run_bzr('diff -r 0..1 hello', retcode=1)

        tree.rename_one('hello', 'hello1')

        self.run_bzr('diff hello1', retcode=1)

        self.run_bzr('diff -r 0..1 hello1', retcode=1)

    def test_diff_to_branch_no_working_tree(self):

        branch1_tree = self.example_branch2()

        dir1 = branch1_tree.bzrdir

        dir1.destroy_workingtree()

        self.assertFalse(dir1.has_workingtree())

        output = self.run_bzr('diff -r 1.. branch1', retcode=1)

        self.assertContainsRe(output[0], '\n\\-original line\n\\+repo line\n')

    def test_custom_format(self):

        class BooDiffTree(DiffTree):

            def show_diff(self, specific_files, extra_trees=None):

                self.to_file.write("BOO!\n")

                return super(BooDiffTree, self).show_diff(specific_files,

                    extra_trees)

        diff_format_registry.register("boo", BooDiffTree, "Scary diff format")

        self.addCleanup(diff_format_registry.remove, "boo")

        self.make_example_branch()

        self.build_tree_contents([('hello', 'hello world!\n')])

        output = self.run_bzr('diff --format=boo', retcode=1)

        self.assertTrue("BOO!" in output[0])

        output = self.run_bzr('diff -Fboo', retcode=1)

        self.assertTrue("BOO!" in output[0])

class TestCheckoutDiff(TestDiff):

    def make_example_branch(self):

        tree = super(TestCheckoutDiff, self).make_example_branch()

        tree = tree.branch.create_checkout('checkout')

        os.chdir('checkout')

        return tree

    def example_branch2(self):

        tree = super(TestCheckoutDiff, self).example_branch2()

        os.mkdir('checkouts')

        tree = tree.branch.create_checkout('checkouts/branch1')

        os.chdir('checkouts')

        return tree

    def example_branches(self):

        branch1_tree, branch2_tree = super(TestCheckoutDiff,

                                           self).example_branches()

        os.mkdir('checkouts')

        branch1_tree = branch1_tree.branch.create_checkout('checkouts/branch1')

        branch2_tree = branch2_tree.branch.create_checkout('checkouts/branch2')

        os.chdir('checkouts')

        return branch1_tree, branch2_tree

class TestDiffLabels(DiffBase):

    def test_diff_label_removed(self):

        tree = super(TestDiffLabels, self).make_example_branch()

        tree.remove('hello', keep_files=False)

        diff = self.run_bzr('diff', retcode=1)

        self.assertTrue("=== removed file 'hello'" in diff[0])

    def test_diff_label_added(self):

        tree = super(TestDiffLabels, self).make_example_branch()

        self.build_tree_contents([('barbar', 'barbar')])

        tree.add('barbar')

        diff = self.run_bzr('diff', retcode=1)

        self.assertTrue("=== added file 'barbar'" in diff[0])

    def test_diff_label_modified(self):

        super(TestDiffLabels, self).make_example_branch()

        self.build_tree_contents([('hello', 'barbar')])

        diff = self.run_bzr('diff', retcode=1)

        self.assertTrue("=== modified file 'hello'" in diff[0])

    def test_diff_label_renamed(self):

        tree = super(TestDiffLabels, self).make_example_branch()

        tree.rename_one('hello', 'gruezi')

        diff = self.run_bzr('diff', retcode=1)

        self.assertTrue("=== renamed file 'hello' => 'gruezi'" in diff[0])

class TestExternalDiff(DiffBase):

    def test_external_diff(self):

        """Test that we can spawn an external diff process"""

        self.disable_missing_extensions_warning()

        # We have to use run_bzr_subprocess, because we need to

        # test writing directly to stdout, (there was a bug in

        # subprocess.py that we had to workaround).

        # However, if 'diff' may not be available

        self.make_example_branch()

        out, err = self.run_bzr_subprocess(

            'diff -Oprogress_bar=none -r 1 --diff-options -ub',

            universal_newlines=True,

            retcode=None)

        if 'Diff is not installed on this machine' in err:

            raise tests.TestSkipped("No external 'diff' is available")

        self.assertEqual('', err)

        # We have to skip the stuff in the middle, because it depends

        # on time.time()

        self.assertStartsWith(out, "=== added file 'goodbye'\n"

                                   "--- goodbye\t1970-01-01 00:00:00 +0000\n"

                                   "+++ goodbye\t")

        self.assertEndsWith(out, "\n@@ -0,0 +1 @@\n"

                                 "+baz\n\n")

    def test_external_diff_options_and_using(self):

        """Test that the options are passed correctly to an external diff process"""

        self.requireFeature(features.diff_feature)

        self.make_example_branch()

        self.build_tree_contents([('hello', 'Foo\n')])

        out, err = self.run_bzr('diff --diff-options -i --using diff',

                                    retcode=1)

        self.assertEquals("=== modified file 'hello'\n", out)

        self.assertEquals('', err)

class TestDiffOutput(DiffBase):

    def test_diff_output(self):

        # check that output doesn't mangle line-endings

        self.make_example_branch()

        self.build_tree_contents([('hello', 'hello world!\n')])

        output = self.run_bzr_subprocess('diff', retcode=1)[0]

        self.assert_('\n+hello world!\n' in output)