def test_eval_unary_minus9(self):
tokens = self._lexer.lex("(-7-3)")
self.assertEqual(6, len(tokens))
expression = Expression()
value = expression.eval(tokens)
self.assertEqual(-10, value)
def test_eval_unary_minus6(self):
tokens = self._lexer.lex("--9")
self.assertEqual(3, len(tokens))
expression = Expression()
with self.assertRaises(BasicSyntaxError):
value = expression.eval(tokens)
def test_eval_unary_minus7(self):
tokens = self._lexer.lex("(2+3)-1")
self.assertEqual(7, len(tokens))
expression = Expression()
value = expression.eval(tokens)
self.assertEqual(4, value)
def test_eval_unary_minus5(self):
tokens = self._lexer.lex("-(2+3)*-(4+5)+-1")
self.assertEqual(16, len(tokens))
expression = Expression()
value = expression.eval(tokens)
self.assertEqual(44, value)
def test_eval_unary_minus3(self):
tokens = self._lexer.lex("10*-8")
self.assertEqual(4, len(tokens))
expression = Expression()
value = expression.eval(tokens)
self.assertEqual(-80, value)
def test_eval_unary_minus2(self):
tokens = self._lexer.lex("-9*3")
self.assertEqual(4, len(tokens))
expression = Expression()
value = expression.eval(tokens)
self.assertEqual(-27, value)
def test_eval1(self):
tokens = self._lexer.lex("1")
self.assertEqual(1, len(tokens))
expression = Expression()
value = expression.eval(tokens)
self.assertEqual(1, value)
def test_eval_parens5(self):
tokens = self._lexer.lex("(7-3) * ((2*4) - (2+5))")
self.assertEqual(19, len(tokens))
expression = Expression()
value = expression.eval(tokens)
self.assertEqual(4, value)
