def test_multiply_ugly():
"""
the ugly, not very robust way....
"""
assert calc.multiply(2, 2) == 4
assert calc.multiply(2, -1) == -2
assert calc.multiply(-2, -3) == 6
assert calc.multiply(3, 0) == 0
assert calc.multiply(0, 3) == 0
def main():
if len(sys.argv) != 4:
error_message = """
Invalid arguments.
Usage:
calculator.py 1 + 3
or 1 x 3
or 1 / 3
or 1 - 3
"""
raise ValueError(error_message + "\n")
x = sys.argv[1]
operator = sys.argv[2]
y = sys.argv[3]
if operator == "+":
return functions.add(x, y)
elif operator == "-":
return functions.subtract(x, y)
elif operator == "x":
return functions.multiply(x, y)
elif operator == "/":
return functions.divide(x, y)
else:
return "invalid input"
def test_multiply(self):
self.assertEqual(calc.multiply(self.x, self.y), 6)
def test_multiply(arg1, arg2, result):
assert calc.multiply(arg1, arg2) == result
def test_multiply(self):
assert 10 == calculator_functions.multiply(2, 5)
if len(sys.argv) != 4:
error_message = """
Invalid arguments.
Usage:
calculator.py 1 + 3
"""
sys.stderr.write(error_message + "\n")
sys.exit(-1)
x = sys.argv[1]
operator = sys.argv[2]
y = sys.argv[3]
if operator == "+":
print functions.add(x, y)
elif operator == "-":
print functions.subtract(x, y)
elif operator == "*":
print functions.multiply(x, y)
elif operator == "/":
print functions.divide(x, y)
else:
print "invalid input"
if len(sys.argv) != 4:
error_message = """
Invalid arguments.
Usage:
calculator.py 1 + 3
"""
sys.stderr.write(error_message + "\n")
sys.exit(-1)
x = sys.argv[1]
operator = sys.argv[2]
y = sys.argv[3]
if operator == "+":
print functions.add(x, y)
elif operator == "-":
print functions.subtract(x, y)
elif operator == "*":
print functions.multiply(x, y)
elif operator == "/":
print functions.divide(x, y)
else:
print "invalid input"
def test_calculator_multiply_function_returns_correct_result(self):
self.assertEqual(0, calculator_functions.multiply(0, 1))
self.assertEqual(6, calculator_functions.multiply(2, 3))
self.assertEqual(2, calculator_functions.multiply(-1, -2))
def test_multiply(self):
self.assertEqual(calc.multiply(self.x, self.y), 6)
if len(sys.argv) != 4:
error_message = """
Invalid arguments.
Usage:
calculator.py 1 + 3
"""
sys.stderr.write(error_message + "\n")
sys.exit(-1)
x = sys.argv[1]
operator = sys.argv[2]
y = sys.argv[3]
if operator == "+":
print(functions.add(x, y))
elif operator == "-":
print(functions.subtract(x, y))
elif operator == "*":
print(functions.multiply(x, y))
elif operator == "/":
print(functions.divide(x, y))
else:
print("invalid input")
def test_multiplication(self):
self.assertEqual(calculator_functions.multiply(2, 2), 4)
