def test_ast_expression_unary_not(self):
for value in trueish:
unary = ast.UnaryExpression(context, 'not', value)
self.assertFalse(unary.evaluate(None))
for value in falseish:
unary = ast.UnaryExpression(context, 'not', value)
self.assertTrue(unary.evaluate(None))
def test_ast_expression_unary_uminus(self):
for value in trueish:
if not isinstance(value, ast.FloatExpression):
continue
unary = ast.UnaryExpression(context, 'uminus', value)
result = unary.evaluate(None)
self.assertTrue(result)
self.assertNotEqual(result, value.value)
for value in falseish:
if not isinstance(value, ast.FloatExpression):
continue
unary = ast.UnaryExpression(context, 'uminus', value)
result = unary.evaluate(None)
self.assertFalse(result)
self.assertEqual(result, value.value)
def test_ast_expresison_unary_minus_type_errors(self):
for value in trueish + falseish:
if isinstance(value, ast.FloatExpression):
continue
unary = ast.UnaryExpression(context, 'uminus', value)
with self.assertRaises(errors.EvaluationError):
unary.evaluate(None)
