def test_std1(): obs = std([0.0, 2.0]) exp = 1.0 assert obs == exp
def test_std5(): # Here, we have more than two values, but all of the values are the same. obs = std([1.0, 1.0, 1.0]) exp = 0.0 assert obs == exp
def test_std3(): # Test a real case where the answer is not one. obs = std([0.0, 4.0]) exp = 2.0 assert obs == exp
def test_std4(): # The first value is not zero. obs = std([1.0, 3.0]) exp = 1.0 assert obs == exp
def test_std2(): # Test the fiducial case when we pass in an empty list. obs = std([]) exp = 0.0 assert obs == exp