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