def test_is_function(self):
"""Tests for is_function method."""
self.assertEqual(expression_parser.Token('sqrt').category, 'function')
self.assertEqual(expression_parser.Token('abs').category, 'function')
self.assertEqual(expression_parser.Token('tan').category, 'function')
with self.assertRaisesRegexp(Exception, 'Invalid token: tan().'):
expression_parser.Token('tan()')
with self.assertRaisesRegexp(Exception, 'Invalid token: Sqrt.'):
expression_parser.Token('Sqrt')
def test_is_operator(self):
"""Tests for is_operator method."""
self.assertEqual(expression_parser.Token('+').category, 'operator')
self.assertEqual(expression_parser.Token('-').category, 'operator')
self.assertEqual(expression_parser.Token('*').category, 'operator')
self.assertEqual(expression_parser.Token('/').category, 'operator')
self.assertEqual(expression_parser.Token('^').category, 'operator')
self.assertEqual(expression_parser.Token('(').category, 'operator')
self.assertEqual(expression_parser.Token(')').category, 'operator')
def test_is_number(self):
"""Tests for is_number method."""
self.assertEqual(expression_parser.Token('1').category, 'number')
self.assertEqual(expression_parser.Token('123').category, 'number')
self.assertEqual(expression_parser.Token('12.34').category, 'number')
self.assertEqual(expression_parser.Token('0.004').category, 'number')
self.assertEqual(expression_parser.Token('pi').category, 'number')
self.assertEqual(expression_parser.Token('e').category, 'number')
with self.assertRaisesRegexp(Exception, 'Invalid token: 8.4.3.'):
expression_parser.Token('8.4.3')
def test_is_identifier(self):
"""Tests for is_identifier method."""
self.assertEqual(expression_parser.Token('a').category, 'identifier')
self.assertEqual(expression_parser.Token('a').category, 'identifier')
self.assertEqual(
expression_parser.Token('alpha').category, 'identifier')
self.assertEqual(expression_parser.Token('A').category, 'identifier')
with self.assertRaisesRegexp(Exception, 'Invalid token: al.'):
expression_parser.Token('al')
self.assertNotEqual(
expression_parser.Token('5').category, 'identifier')
