def test_evaluation_of_lifo(self):
environment = Environment()
queue = LIFO()
Evaluation(environment, queue, Factory()).result
queue = environment.look_up(Symbols.QUEUE).delegate
self.assertIsInstance(queue, LIFOTaskPool)
def test_evaluation_of_lifo(self):
environment = Environment()
queue = LIFO()
Evaluation(environment, queue, Factory()).result
queue = environment.look_up(Symbols.QUEUE).delegate
self.assertIsInstance(queue, LIFOTaskPool)
def test_look_up_masked_bindings(self):
env1 = Environment()
env1.define("my_var", 8)
env2 = env1.create_local_environment()
env2.define("my_var", 7)
env3 = env2.create_local_environment()
env3.define("my_var", 6)
self.assertEqual(env1.look_up("my_var"), 8)
self.assertEqual(env2.look_up("my_var"), 7)
self.assertEqual(env3.look_up("my_var"), 6)
def test_look_up_masked_bindings(self):
env1 = Environment()
env1.define("my_var", 8)
env2 = env1.create_local_environment()
env2.define("my_var", 7)
env3 = env2.create_local_environment()
env3.define("my_var", 6)
self.assertEqual(env1.look_up("my_var"), 8)
self.assertEqual(env2.look_up("my_var"), 7)
self.assertEqual(env3.look_up("my_var"), 6)
def test_look_up_a_missing_binding(self):
env1 = Environment()
env1.define("var1", 5)
self.assertIsNone(env1.look_up("missing_symbol"))
def test_look_up_a_missing_binding(self):
env1 = Environment()
env1.define("var1", 5)
self.assertIsNone(env1.look_up("missing_symbol"))