| import antlr3 |
| import testbase |
| import unittest |
| |
| class t009lexer(testbase.ANTLRTest): |
| def setUp(self): |
| self.compileGrammar() |
| |
| |
| def lexerClass(self, base): |
| class TLexer(base): |
| def emitErrorMessage(self, msg): |
| # report errors to /dev/null |
| pass |
| |
| def reportError(self, re): |
| # no error recovery yet, just crash! |
| raise re |
| |
| return TLexer |
| |
| |
| def testValid(self): |
| stream = antlr3.StringStream('085') |
| lexer = self.getLexer(stream) |
| |
| token = lexer.nextToken() |
| self.assertEqual(token.type, self.lexerModule.DIGIT) |
| self.assertEqual(token.start, 0) |
| self.assertEqual(token.stop, 0) |
| self.assertEqual(token.text, '0') |
| |
| token = lexer.nextToken() |
| self.assertEqual(token.type, self.lexerModule.DIGIT) |
| self.assertEqual(token.start, 1) |
| self.assertEqual(token.stop, 1) |
| self.assertEqual(token.text, '8') |
| |
| token = lexer.nextToken() |
| self.assertEqual(token.type, self.lexerModule.DIGIT) |
| self.assertEqual(token.start, 2) |
| self.assertEqual(token.stop, 2) |
| self.assertEqual(token.text, '5') |
| |
| token = lexer.nextToken() |
| self.assertEqual(token.type, self.lexerModule.EOF) |
| |
| |
| def testMalformedInput(self): |
| stream = antlr3.StringStream('2a') |
| lexer = self.getLexer(stream) |
| |
| lexer.nextToken() |
| try: |
| token = lexer.nextToken() |
| self.fail(token) |
| |
| except antlr3.MismatchedSetException as exc: |
| # TODO: This should provide more useful information |
| self.assertIsNone(exc.expecting) |
| self.assertEqual(exc.unexpectedType, 'a') |
| self.assertEqual(exc.charPositionInLine, 1) |
| self.assertEqual(exc.line, 1) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |
