1 import antlr3 2 import testbase 3 import unittest 4 5 class t002lexer(testbase.ANTLRTest): 6 def setUp(self): 7 self.compileGrammar() 8 9 10 def lexerClass(self, base): 11 class TLexer(base): 12 def emitErrorMessage(self, msg): 13 # report errors to /dev/null 14 pass 15 16 def reportError(self, re): 17 # no error recovery yet, just crash! 18 raise re 19 20 return TLexer 21 22 23 def testValid(self): 24 stream = antlr3.StringStream('01') 25 lexer = self.getLexer(stream) 26 27 token = lexer.nextToken() 28 self.failUnlessEqual(token.type, self.lexerModule.ZERO) 29 30 token = lexer.nextToken() 31 self.failUnlessEqual(token.type, self.lexerModule.ONE) 32 33 token = lexer.nextToken() 34 self.failUnlessEqual(token.type, self.lexerModule.EOF) 35 36 37 def testMalformedInput(self): 38 stream = antlr3.StringStream('2') 39 lexer = self.getLexer(stream) 40 41 try: 42 token = lexer.nextToken() 43 self.fail() 44 45 except antlr3.NoViableAltException, exc: 46 self.failUnlessEqual(exc.unexpectedType, '2') 47 48 49 if __name__ == '__main__': 50 unittest.main() 51
