def test_kata_score_0_0_receiver_win():
assert TennisGame(0, 0).add_score(1) == (0, 15)
def test_kata_score_A_40_sever_win():
assert TennisGame("A", 40).add_score(0) == ("Win", 40)
def test_kata_score_40_A_receiver_win():
assert TennisGame(40, "A").add_score(1) == (40, "Win")
# receiver win
def test_kata_score_A_40_receiver_win():
assert TennisGame("A", 40).add_score(1) == (40, 40)
def test_kata_score_40_A_server_win():
assert TennisGame(40, "A").add_score(0) == (40, 40)
def test_kata_score_0_0_server_win():
assert TennisGame(0, 0).add_score(0) == (15, 0)
def test_kata_score_something_40_receiver_win():
assert TennisGame(15, 40).add_score(1) == (15, "Win")
def test_kata_score_40_something_server_win():
assert TennisGame(40, 15).add_score(0) == ("Win", 15)