def test_testLiteralInterface():
obj = JSObjectLiteralForInterface()
friendly = obj.give_me_friendly()
gen = obj.give_me_friendly_generator()
assert friendly.hello() == "I am literally friendly!"
assert gen.hello() == "giveMeFriendlyGenerator"
assert gen.next() == 42
def test_testInterfaceParameter():
obj = JSObjectLiteralForInterface()
friendly = obj.give_me_friendly()
greeting_augmenter = GreetingAugmenter()
assert friendly.hello() == "I am literally friendly!"
assert (greeting_augmenter.better_greeting(friendly) ==
"I am literally friendly! Let me buy you a drink!")