1 import antlr3 2 import testbase 3 import unittest 4 5 class t015calc(testbase.ANTLRTest): 6 def setUp(self): 7 self.compileGrammar() 8 9 10 def _evaluate(self, expr, expected, errors=[]): 11 cStream = antlr3.StringStream(expr) 12 lexer = self.getLexer(cStream) 13 tStream = antlr3.CommonTokenStream(lexer) 14 parser = self.getParser(tStream) 15 result = parser.evaluate() 16 assert result == expected, "%r != %r" % (result, expected) 17 assert len(parser.reportedErrors) == len(errors), parser.reportedErrors 18 19 20 def testValid01(self): 21 self._evaluate("1 + 2", 3) 22 23 24 def testValid02(self): 25 self._evaluate("1 + 2 * 3", 7) 26 27 28 def testValid03(self): 29 self._evaluate("10 / 2", 5) 30 31 32 def testValid04(self): 33 self._evaluate("6 + 2*(3+1) - 4", 10) 34 35 36 def testMalformedInput(self): 37 self._evaluate("6 - (2*1", 4, ["mismatched token at pos 8"]) 38 39 # FIXME: most parse errors result in TypeErrors in action code, because 40 # rules return None, which is then added/multiplied... to integers. 41 # evaluate("6 - foo 2", 4, ["some error"]) 42 43 44 if __name__ == '__main__': 45 unittest.main() 46 47
