def test_max_product_raises_error_if_array_is_empty():
# GIVEN
nums = []
# EXPECT
with pytest.raises(ValueError):
max_product(nums)
def test_max_product_returns_zero_when_all_elements_are_zero():
# GIVEN
nums = [0, 0, 0, 0]
# WHEN
result = max_product(nums)
# THEN
assert result == 0
def test_max_product_finds_maximum_product_subarray_when_positive_and_negative_numbers_and_zeros_are_present(
):
# GIVEN
nums = [-1, -2, -3, 0, 1]
# WHEN
result = max_product(nums)
# THEN
assert result == 6
def test_max_product_finds_maximum_product_subarray_when_some_zeroes_are_present(
):
# GIVEN
nums = [9, 3, 0, 2, 3, 8, 0, 7]
# WHEN
result = max_product(nums)
# THEN
assert result == 48
def test_max_product_finds_maximum_product_subarray_given_odd_number_of_negative_elements(
):
# GIVEN
nums = [8, 3, 5, -6, 2, 4]
# WHEN
result = max_product(nums)
# THEN
assert result == 120
def test_max_product_finds_maximum_product_subarray_when_all_elements_are_positive(
):
# GIVEN
nums = [2, 1, 4, 3, 5]
# WHEN
result = max_product(nums)
# THEN
assert result == 120
def test_max_product_finds_maximum_product_subarray_given_even_number_of_negative_elements(
):
# GIVEN
nums = [6, 8, -2, 5, 4, -3, 10]
# WHEN
result = max_product(nums)
# THEN
assert result == 57600
def test_max_product_finds_maximum_product_subarray_when_all_elements_are_negative(
):
# GIVEN
nums = [-4, -2, -5, -1, -3]
# WHEN
result = max_product(nums)
# THEN
assert result == 40