def test_harmonicMean_sameValue_return_1(self):
zerolist = [1, 1, 1]
stat = Statistics(zerolist)
actual = stat.harmonicMean()
expected = 1
self.assertEqual(actual, expected)
def test_harmonicMean_0value_return_None(self):
zerolist = [0, 21, 414]
stat = Statistics(zerolist)
actual = stat.harmonicMean()
expected = None
self.assertEqual(actual, expected)
def test_harmonicMean_0value_return_2(self):
zerolist = [1, 4, 4]
stat = Statistics(zerolist)
actual = stat.harmonicMean()
expected = 2
self.assertEqual(actual, expected)
def test_harmonicMean_return_none(self):
emptyList = []
stat = Statistics(emptyList)
actual = stat.harmonicMean()
expected = None
self.assertEqual(actual, expected)
