~bzr-pqm/bzr/bzr.dev

import os

import unittest

from bzrlib.tests import TestCaseWithTransport, TestCase

from bzrlib.branch import ScratchBranch, Branch

from bzrlib.errors import PathNotChild

from bzrlib.osutils import relpath, pathjoin, abspath, realpath

class MoreTests(TestCaseWithTransport):

    def test_relpath(self):

        """test for branch path lookups

        bzrlib.osutils._relpath do a simple but subtle

        job: given a path (either relative to cwd or absolute), work out

        if it is inside a branch and return the path relative to the base.

        """

        import tempfile

        from bzrlib.osutils import rmtree

        savedir = os.getcwdu()

        dtmp = tempfile.mkdtemp()

        # On Mac OSX, /tmp actually expands to /private/tmp

        dtmp = realpath(dtmp)

        def rp(p):

            return relpath(dtmp, p)

        try:

            # check paths inside dtmp while standing outside it

            self.assertEqual(rp(pathjoin(dtmp, 'foo')), 'foo')

            # root = nothing

            self.assertEqual(rp(dtmp), '')

            self.assertRaises(PathNotChild,

                              rp,

                              '/etc')

            # now some near-miss operations -- note that

            # os.path.commonprefix gets these wrong!

            self.assertRaises(PathNotChild,

                              rp,

                              dtmp.rstrip('\\/') + '2')

            self.assertRaises(PathNotChild,

                              rp,

                              dtmp.rstrip('\\/') + '2/foo')

            # now operations based on relpath of files in current

            # directory, or nearby

            os.chdir(dtmp)

            self.assertEqual(rp('foo/bar/quux'), 'foo/bar/quux')

            self.assertEqual(rp('foo'), 'foo')

            self.assertEqual(rp('./foo'), 'foo')

            self.assertEqual(rp(abspath('foo')), 'foo')

            self.assertRaises(PathNotChild,

                              rp, '../foo')

        finally:

            os.chdir(savedir)

            rmtree(dtmp)