def test_core_should_return_15_0_for_one_player_win_ball(self):
tennis = Tennis()
tennis.player_one_win()
score = tennis.score()
self.assertEquals("15 - 0", score)
def test_core_should_return_30_15_for_one_player_win_two_balls_and_another_win_one_ball(self):
tennis = Tennis()
tennis.player_one_win()
tennis.player_one_win()
tennis.player_two_win()
score = tennis.score()
self.assertEquals("30 - 15", score)
def test_score_should_return_zero_if_no_one_palyer_win_ball(self):
tennis = Tennis()
score = tennis.score()
self.assertEquals(score, "0 - 0")