Пример #1
0
 def testSimpleExpression(self):
     tokens = iter([Identifier('x'), '+', Identifier('y'), EOF()])
     parser = Parser(tokens)
     parser._advance()
     expression = parser._parse_expression()
     self.assertIsInstance(expression, Expression)
     self.assertIsInstance(expression.lhs, Variable)
     self.assertEquals(expression.lhs.identifier.identifier, 'x')
     self.assertIsInstance(expression.rhs, Variable)
     self.assertEquals(expression.rhs.identifier.identifier, 'y')
     self.assertEquals('+', expression.operator)
Пример #2
0
 def testComplexExpression(self):
     tokens = iter([Identifier('a'), '+', Identifier('b'), '+', '(',
                    Identifier('c'), '+', Identifier('d'), ')', '*',
                    Identifier('e'), '*', Identifier('f'), '+',
                    Identifier('g'), EOF()])
     parser = Parser(tokens)
     parser._advance()
     expression = parser._parse_expression()
     self.assertIsInstance(expression, Expression)
     self.assertEquals(expression.lhs.lhs.lhs.identifier.identifier, 'a')
     self.assertEquals(expression.lhs.lhs.operator, '+')
     self.assertEquals(expression.lhs.lhs.rhs.identifier.identifier, 'b')
     self.assertEquals(expression.lhs.operator, '+')
     self.assertEquals(expression.operator, '+')
     self.assertEquals(expression.lhs.rhs.lhs.lhs.lhs.identifier.identifier, 'c')
     self.assertEquals(expression.lhs.rhs.lhs.lhs.operator, '+')
     self.assertEquals(expression.lhs.rhs.lhs.lhs.rhs.identifier.identifier, 'd')
     self.assertEquals(expression.lhs.rhs.lhs.operator, '*')
     self.assertEquals(expression.lhs.rhs.lhs.rhs.identifier.identifier, 'e')
     self.assertEquals(expression.lhs.rhs.operator, '*')
     self.assertEquals(expression.lhs.rhs.rhs.identifier.identifier, 'f')
     self.assertEquals(expression.rhs.identifier.identifier, 'g')