def test_random_inputs(self):
def naive_implementation(numbers):
return max(a * b * c for (a, b, c) in combinations(numbers, 3))
for _ in range(100):
nums = random.sample(range(-100, 100), 20)
assert naive_implementation(nums) == highest_product(nums)
def _highest_product():
raw_nums = request.form['numbers']
nums = []
for num in raw_nums.split():
try:
nums.append(int(num))
except ValueError:
return jsonify(error="%s is not a valid integer" % num)
try:
prod = highest_product(nums)
except ValueError:
return jsonify(error="Needs at least three integers")
return jsonify(result=prod)
def test_too_short_input(self):
with pytest.raises(ValueError):
highest_product([0, 6])
def test_very_long_input(self):
numbers = [6, 5, 10] + [1, 2] * 350 + [-10, -5] * 1000
assert highest_product(numbers) == -10 * -10 * 10
def test_long_input(self):
numbers = [6, 5, 10] + [1, 2] * 350
assert highest_product(numbers) == 300
def test_zero_result(self):
numbers = [-10, -5, -2, 0]
assert highest_product(numbers) == 0
def test_mixed_sign_negative_result(self):
numbers = [1, -10, 5]
assert highest_product(numbers) == 1 * -10 * 5
def test_mixed_sign_positive_result(self):
numbers = [1, -6, -5, 10, 5]
assert highest_product(numbers) == 10 * -6 * -5
def test_all_negative(self):
numbers = [-1, -6, -5, -10, -5]
assert highest_product(numbers) == -1 * -5 * -5
def test_all_positive(self):
numbers = [1, 6, 5, 10, 5]
assert highest_product(numbers) == 10 * 6 * 5
