def test_6min_and_1sec_duration(self): assert calc_call_cost(calls[9]) == 0.29
def test_5min_and_59sec_duration(self): assert calc_call_cost(calls[7]) == 0.27
def test_6min_duration(self): assert calc_call_cost(calls[8]) == 0.27
def test_5min_duration(self): assert calc_call_cost(calls[6]) == 0.25
def test_61sec_duration(self): assert calc_call_cost(calls[5]) == 0.10
def test_60sec_duration(self): assert calc_call_cost(calls[4]) == 0.05
def test_59sec_duration(self): assert calc_call_cost(calls[3]) == 0.05
def test_0sec_duration(self): assert calc_call_cost(calls[0]) == 0