def testClearWithSpaceArgument(self):
space = Space("Hellow world")
space.clear("hey there")
self.assertEqual(space.length(), 1)
self.assertEqual(space.get('hey'), 'there', 'Clear with a Space argument should deep copy the argument Space')
def testClear(self):
space = Space('Hello world')
self.assertEqual(space.length(), 1)
self.assertTrue(isinstance(space.clear(), Space), 'clear returns Space so chainable')
self.assertEqual(space.length(), 0)
