def test_get_value(self):
"""
Returns the value of the current node
"""
node = Node("test value")
result = node.get_value()
self.assertEqual(result, "test value")
def test_instantiates_with_none_default(self):
"""
Instantiates with None as default if no value is given
"""
node = Node()
result = node.get_value()
self.assertEqual(result, None)
def test_get_value_none(self):
"""
Returns None when get_value is invoked if no value
was passed to the node when instantiated
"""
node = Node()
result = node.get_value()
self.assertEqual(result, None)