def test_dynamic_scope(self):
env = Environment()
local_env1 = env.create_local_environment()
local_env1.define("var_1", 123)
local_env2 = env.create_local_environment(local_env1)
self.assertIsNone(local_env2.look_up("var_1"))
self.assertEqual(local_env2.dynamic_look_up("var_1"), 123)
def test_dynamic_scope(self):
env = Environment()
local_env1 = env.create_local_environment()
local_env1.define("var_1", 123)
local_env2 = env.create_local_environment(local_env1)
self.assertIsNone(local_env2.look_up("var_1"))
self.assertEqual(local_env2.dynamic_look_up("var_1"), 123)
# Test creating an environment that is not a child of another environment
def test_look_up_bindings_in_parent(self):
env1 = Environment()
env1.define("my_var", 4)
env2 = env1.create_local_environment()
env3 = env2.create_local_environment()
self.assertEqual(env3.look_up("my_var"), 4)
def test_look_up_bindings_in_parent(self):
env1 = Environment()
env1.define("my_var", 4)
env2 = env1.create_local_environment()
env3 = env2.create_local_environment()
self.assertEqual(env3.look_up("my_var"), 4)
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)
