layouts: fix crash when importing hgsubversion itself (issue #402) Mercurial extensions are a bit weird: they aren't normally in sys.path, so you can't assume that "import hgsubversion" works. Luckily, Mercurial sneaks a little treat into sys.modules so that "import hgext_hgsubversion" does work. In fact, to get things working *as a Mercurial extension*, all that's needed is that trivial change to two import lines, in layouts/detect.py and layouts/standard.py. Unfortunately, hgsubversion is also imported as a Python module, in its own test suite. In that context, there is no "hgext_" trick -- unless we do it in ourselves, which I've done in TestBase.setUp(). That would work fine ... except that test_util imports from hgsubversion, which ends up importing hgsubversion.layouts.{detect,standard}, which want the "hgext_" trick to work. But it hasn't been done yet when we're still importing; it doesn't happen until setUp() runs. So make those two imports happen late, in the functions that need them. Incidentally, this is only necessary to support Mercurial <= 2.7. Mercurial got a bit smarter in 2.8: http://selenic.com/repo/hg/rev/621a26eb3a99

import test_util

import unittest

from mercurial import node

class TestFetchExec(test_util.TestBase):
    stupid_mode_tests = True

    def assertexec(self, ctx, files, isexec=True):
        for f in files:
            self.assertEqual(isexec, 'x' in ctx[f].flags())

    def test_exec(self):
        repo = self._load_fixture_and_fetch('executebit.svndump')
        self.assertexec(repo[0], ['text1', 'binary1', 'empty1'], True)
        self.assertexec(repo[0], ['text2', 'binary2', 'empty2'], False)
        self.assertexec(repo[1], ['text1', 'binary1', 'empty1'], False)
        self.assertexec(repo[1], ['text2', 'binary2', 'empty2'], True)

    def test_empty_prop_val_executable(self):
        repo = self._load_fixture_and_fetch('executable_file_empty_prop.svndump')
        self.assertEqual(node.hex(repo['tip'].node()),
                         '08e6b380bf291b361a418203a1cb9427213cd1fd')
        self.assertEqual(repo['tip']['foo'].flags(), 'x')