def test_dotdot_change_directory(self):
self.assertEqual(change_directory('cd ..', '/foo/bar'), '/foo')
self.assertEqual(change_directory('cd ../..', '/foo/bar'), '/')
self.assertEqual(change_directory('cd ../../', '/foo/bar'), '/')
self.assertEqual(change_directory('cd ..', '/foo'), '/')
self.assertEqual(change_directory('cd ..', '/'), '/')
self.assertEqual(change_directory('cd ../', '/foo/bar'), '/foo')
self.assertEqual(change_directory('cd ../baz', '/foo/bar'), '/foo/baz')
def test_mixed_dot_change_directory(self):
self.assertEqual(change_directory('cd ./.', '/foo/bar'), '/foo/bar')
self.assertEqual(change_directory('cd ././.', '/foo/bar'), '/foo/bar')
self.assertEqual(change_directory('cd ./../.', '/foo/bar'), '/foo')
self.assertEqual(change_directory('cd .././.', '/foo/bar'), '/foo')
self.assertEqual(change_directory('cd ../../.', '/foo/bar'), '/')
self.assertEqual(change_directory('cd ../../..', '/foo/bar'), '/')
def test_empty_change_directory(self):
self.assertEqual(change_directory('cd', '/'), '/')
self.assertEqual(change_directory('cd', '/foo/bar'), '/foo/bar')
def test_relative_change_directory(self):
self.assertEqual(change_directory('cd etc', '/'), '/etc')
self.assertEqual(change_directory('cd etc', '/etc'), '/etc/etc')
def test_absolute_change_directory(self):
self.assertEqual(change_directory('cd /', '/foo/bar'), '/')
self.assertEqual(change_directory('cd /', '/'), '/')