def test_get_collector_trail_and_back(self):
a = self.tmpdir.ensure("a", dir=1)
self.tmpdir.ensure("a", "__init__.py")
x = self.tmpdir.ensure("a", "trail.py")
config = py.test.config._reparse([x])
col = config._getcollector(x)
trail = config.get_collector_trail(col)
assert len(trail) == 2
assert trail[0] == a.relto(config.topdir)
assert trail[1] == ('trail.py',)
col2 = config._getcollector(trail)
assert col2.listnames() == col.listnames()
def test_get_collector_trail_topdir_and_beyond(self):
config = py.test.config._reparse([self.tmpdir])
col = config._getcollector(config.topdir)
trail = config.get_collector_trail(col)
assert len(trail) == 2
assert trail[0] == '.'
assert trail[1] == ()
col2 = config._getcollector(trail)
assert col2.fspath == config.topdir
assert len(col2.listchain()) == 1
col3 = config._getcollector(config.topdir.dirpath())
py.test.raises(ValueError,
"config.get_collector_trail(col3)")
