class TestParser(TestCase):
def setUp(self):
self.tokenizer = Tokenizer()
self.parser = Parser({})
def test_match_var_list(self):
self.tokenizer.parse('A, B, C')
self.assertEqual(['A', 'B', 'C'], self.parser.match_var_list(self.tokenizer))
def test_match_relop(self):
self.tokenizer.parse('2 > 1')
self.assertEqual(1, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 < 1')
self.assertEqual(0, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 <= 2')
self.assertEqual(1, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 <= 1')
self.assertEqual(0, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 >= 2')
self.assertEqual(1, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 >= 3')
self.assertEqual(0, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 = 2')
self.assertEqual(1, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 = 3')
self.assertEqual(0, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 <> 3')
self.assertEqual(1, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 <> 2')
self.assertEqual(0, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 >< 3')
self.assertEqual(1, self.parser.match_relop(self.tokenizer))
self.tokenizer.parse('2 >< 2')
self.assertEqual(0, self.parser.match_relop(self.tokenizer))
def test_match_expression_list(self):
self.tokenizer.parse('2+3+2*2, 1+2, 3, "abcd"')
self.assertEqual([9,3,3, 'abcd'], self.parser.match_expression_list(self.tokenizer))
def test_match_expression(self):
self.tokenizer.parse('2+3+2*2')
self.assertEqual(9, self.parser.match_expression(self.tokenizer))
def test_match_term(self):
self.tokenizer.parse('2*3*4')
self.assertEqual(24, self.parser.match_term(self.tokenizer))
def test_match_factor(self):
self.tokenizer.parse('123')
self.assertEqual(123, self.parser.match_factor(self.tokenizer))
self.parser._variables['A'] = 456
self.tokenizer.parse('A')
self.assertEqual(456, self.parser.match_factor(self.tokenizer))
def test_match_brackets(self):
self.tokenizer.parse('(1 + 2) * (3 + 5)')
self.assertEqual(24, self.parser.match_expression(self.tokenizer))
def test_left_associativity(self):
self.tokenizer.parse('10-2+2')
self.assertEqual(10, self.parser.match_term(self.tokenizer))
