def test_valueerror():
"""
asserts that when prime_factors is called with a data type
that is not an integer (e.g. a string or float), a ValueError is raised.
"""
p_1 = prime.PrimeFactors('a')
assert p_1.number == ValueError
def test_eight():
"""
asserts that when prime_factors is called with 8,
the list [2, 2, 2] will be generated
"""
p_1 = list(prime.PrimeFactors(8))
assert p_1 == [2, 2, 2]
def test_nine():
"""
asserts that when prime_factors is called with 9,
the list [3, 3] will be generated
"""
p_1 = list(prime.PrimeFactors(9))
assert p_1 == [3, 3]
def test_six():
"""
asserts that when prime_factors is called with 6,
the list [2, 3] will be generated
"""
p_1 = list(prime.PrimeFactors(6))
assert p_1 == [2, 3]
def test_four():
"""
asserts that when prime_factors is called with 4,
the list [2, 2] will be generated
"""
p_1 = list(prime.PrimeFactors(4))
assert p_1 == [2, 2]
def test_three():
"""
asserts that when prime_factors is called with 3,
the list [3] will be generated
"""
p_1 = list(prime.PrimeFactors(3))
assert p_1 == [3]
def test_two():
"""
asserts that when prime_factors is called with 2,
the list [2] will be generated
"""
p_1 = list(prime.PrimeFactors(2))
assert p_1 == [2]
def test_one():
"""
asserts that when prime_factors is called with 1,
an empty list will be generated
"""
p_1 = list(prime.PrimeFactors(1))
assert p_1 == []