| import antlr3 |
| import testbase |
| import unittest |
| |
| class t015calc(testbase.ANTLRTest): |
| def setUp(self): |
| self.compileGrammar() |
| |
| |
| def _evaluate(self, expr, expected, errors=[]): |
| cStream = antlr3.StringStream(expr) |
| lexer = self.getLexer(cStream) |
| tStream = antlr3.CommonTokenStream(lexer) |
| parser = self.getParser(tStream) |
| result = parser.evaluate() |
| assert result == expected, "%r != %r" % (result, expected) |
| assert len(parser.reportedErrors) == len(errors), parser.reportedErrors |
| |
| |
| def testValid01(self): |
| self._evaluate("1 + 2", 3) |
| |
| |
| def testValid02(self): |
| self._evaluate("1 + 2 * 3", 7) |
| |
| |
| def testValid03(self): |
| self._evaluate("10 / 2", 5) |
| |
| |
| def testValid04(self): |
| self._evaluate("6 + 2*(3+1) - 4", 10) |
| |
| |
| def testMalformedInput(self): |
| self._evaluate("6 - (2*1", 4, ["mismatched token at pos 8"]) |
| |
| # FIXME: most parse errors result in TypeErrors in action code, because |
| # rules return None, which is then added/multiplied... to integers. |
| # evaluate("6 - foo 2", 4, ["some error"]) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |
| |
