def test_invalid(self):
with self.assertRaises(calc.MalformedExpressionError):
calc.ShuntingYardEvaluator(['1', '+']).evaluate()
with self.assertRaises(calc.MalformedExpressionError):
calc.ShuntingYardEvaluator(['(', '6']).evaluate()
with self.assertRaises(calc.MalformedExpressionError):
calc.ShuntingYardEvaluator(['abc']).evaluate()
def test_evaluate_minus_minus(self):
self.assertEqual(
9,
calc.ShuntingYardEvaluator(['-', '3', '*', '(', '-', '3',
')']).evaluate())
self.assertEqual(
9,
calc.ShuntingYardEvaluator(['-', '3', '*', '-', '3']).evaluate())
def test_assoc(self):
self.assertEqual(
6,
calc.ShuntingYardEvaluator(['1', '+', '2', '+', '3', '+',
'0']).evaluate())
self.assertEqual(
8,
calc.ShuntingYardEvaluator(['2', '*', '2', '*', '2', '*',
'1']).evaluate())
self.assertEqual(
256,
calc.ShuntingYardEvaluator(['2', '^', '2', '^', '3']).evaluate())
def test_evaluate_binary(self):
self.assertEqual(
5,
calc.ShuntingYardEvaluator(['2', '+', '3']).evaluate())
self.assertEqual(
1,
calc.ShuntingYardEvaluator(['-', '2', '+', '3']).evaluate())
self.assertEqual(
6,
calc.ShuntingYardEvaluator(['2', '*', '3']).evaluate())
self.assertEqual(
5,
calc.ShuntingYardEvaluator(['2', '*', '3', '-', '1']).evaluate())
self.assertEqual(
-7,
calc.ShuntingYardEvaluator(['2', '-', '3', '*', '3']).evaluate())
def test_evaluate_par(self):
self.assertEqual(
14,
calc.ShuntingYardEvaluator(['2', '*', '(', '7', ')']).evaluate())
self.assertEqual(
-3,
calc.ShuntingYardEvaluator(['9', '/', '(', '-', '3',
')']).evaluate())
self.assertEqual(
-3,
calc.ShuntingYardEvaluator(['9', '/', '(', '-', '3',
')']).evaluate())
self.assertEqual(
6,
calc.ShuntingYardEvaluator(['2', '*', '(', '7', '-', '4',
')']).evaluate())
self.assertEqual(
1.5,
calc.ShuntingYardEvaluator(['(', '7', '-', '4', ')', '/',
'2']).evaluate())
def test_bug_sl(self):
self.assertEqual(
-2,
calc.ShuntingYardEvaluator(['-', '1', '-', '1']).evaluate())
def test_evaluate_unary(self):
self.assertEqual(1, calc.ShuntingYardEvaluator(['1']).evaluate())
self.assertEqual(1.9, calc.ShuntingYardEvaluator(['1.9']).evaluate())
self.assertEqual(-1, calc.ShuntingYardEvaluator(['-', '1']).evaluate())
self.assertEqual(-1.5,
calc.ShuntingYardEvaluator(['-', '1.5']).evaluate())