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bzrlib/tests/blackbox/test_diff.py
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# Copyright (C) 2005, 2006 by Canonical Ltd
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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 re
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import bzrlib
 
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from bzrlib import workingtree
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from bzrlib.branch import Branch
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from bzrlib import workingtree
 
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from bzrlib.tests import TestSkipped
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from bzrlib.tests.blackbox import ExternalBase
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class TestDiff(ExternalBase):
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    def make_example_branch(test):
 
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    def make_example_branch(self):
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        # FIXME: copied from test_too_much -- share elsewhere?
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        test.runbzr('init')
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        file('hello', 'wb').write('foo\n')
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        test.runbzr('add hello')
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        test.runbzr('commit -m setup hello')
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        file('goodbye', 'wb').write('baz\n')
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        test.runbzr('add goodbye')
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        test.runbzr('commit -m setup goodbye')
 
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        tree = self.make_branch_and_tree('.')
 
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        open('hello', 'wb').write('foo\n')
 
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        tree.add(['hello'])
 
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        tree.commit('setup')
 
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        open('goodbye', 'wb').write('baz\n')
 
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        tree.add(['goodbye'])
 
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        tree.commit('setup')
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    def test_diff(self):
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        self.make_example_branch()
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                          "-new content\n"
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                          "+contents of branch1/file\n"
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                          "\n", subst_dates(out))
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        out, ett = self.run_bzr_captured(['diff', 'branch2', 'branch1'],
 
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        out, err = self.run_bzr_captured(['diff', 'branch2', 'branch1'],
 
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                                         retcode=1)
 
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        self.assertEquals('', err)
 
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        self.assertEqualDiff("=== modified file 'file'\n"
 
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                              "--- file\tYYYY-MM-DD HH:MM:SS +ZZZZ\n"
 
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                              "+++ file\tYYYY-MM-DD HH:MM:SS +ZZZZ\n"
 
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                              "@@ -1,1 +1,1 @@\n"
 
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                              "-new content\n"
 
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                              "+contents of branch1/file\n"
 
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                              "\n", subst_dates(out))
 
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    def test_diff_revno_branches(self):
 
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        self.example_branches()
 
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        print >> open('branch2/file', 'wb'), 'even newer content'
 
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        self.run_bzr_captured(['commit', '-m', 
 
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                               'update file once more', 'branch2'])
 
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        out, err = self.run_bzr_captured(['diff', '-r',
 
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                                          'revno:1:branch2..revno:1:branch1'],
 
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                                         retcode=0)
 
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        self.assertEquals('', err)
 
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        self.assertEquals('', out)
 
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        out, err = self.run_bzr_captured(['diff', '-r', 
 
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                                          'revno:2:branch2..revno:1:branch1'],
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                                         retcode=1)
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        self.assertEquals('', err)
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        self.assertEqualDiff("=== modified file 'file'\n"
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        self.example_branch2()
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        print >> open('branch1/file1', 'wb'), 'new line'
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        output = self.run_bzr_captured(['diff', '-r', '1..', 'branch1'], retcode=1)
 
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        output = self.run_bzr_captured(['diff', '-r', '1..', 'branch1'],
 
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                                       retcode=1)
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        self.assertTrue('\n-original line\n+new line\n' in output[0])
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    def test_diff_across_rename(self):
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        self.runbzr('rename hello gruezi')
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        diff = self.run_bzr_captured(['diff'], retcode=1)
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        self.assertTrue("=== renamed file 'hello' => 'gruezi'" in diff[0])
 
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class TestExternalDiff(TestDiff):
 
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    def test_external_diff(self):
 
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        """Test that we can spawn an external diff process"""
 
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        # We have to use run_bzr_subprocess, because we need to
 
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        # test writing directly to stdout, (there was a bug in
 
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        # subprocess.py that we had to workaround).
 
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        # However, if 'diff' may not be available
 
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        self.make_example_branch()
 
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        orig_progress = os.environ.get('BZR_PROGRESS_BAR')
 
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        try:
 
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            os.environ['BZR_PROGRESS_BAR'] = 'none'
 
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            out, err = self.run_bzr_subprocess('diff', '-r', '1',
 
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                                               '--diff-options', '-ub',
 
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                                               retcode=None)
 
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        finally:
 
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            if orig_progress is None:
 
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                del os.environ['BZR_PROGRESS_BAR']
 
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            else:
 
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                os.environ['BZR_PROGRESS_BAR'] = orig_progress
 
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        if 'Diff is not installed on this machine' in err:
 
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            raise TestSkipped("No external 'diff' is available")
 
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        self.assertEqual('', err)
 
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        # We have to skip the stuff in the middle, because it depends
 
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        # on time.time()
 
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        self.assertStartsWith(out, "=== added file 'goodbye'\n"
 
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                                   "--- goodbye\t1970-01-01 00:00:00 +0000\n"
 
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                                   "+++ goodbye\t")
 
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        self.assertEndsWith(out, "\n@@ -0,0 +1 @@\n"
 
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                                 "+baz\n\n")