1 import antlr3 2 import testbase 3 import unittest 4 5 class t004lexer(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('ffofoofooo') 25 lexer = self.getLexer(stream) 26 27 token = lexer.nextToken() 28 assert token.type == self.lexerModule.FOO 29 assert token.start == 0, token.start 30 assert token.stop == 0, token.stop 31 assert token.text == 'f', token.text 32 33 token = lexer.nextToken() 34 assert token.type == self.lexerModule.FOO 35 assert token.start == 1, token.start 36 assert token.stop == 2, token.stop 37 assert token.text == 'fo', token.text 38 39 token = lexer.nextToken() 40 assert token.type == self.lexerModule.FOO 41 assert token.start == 3, token.start 42 assert token.stop == 5, token.stop 43 assert token.text == 'foo', token.text 44 45 token = lexer.nextToken() 46 assert token.type == self.lexerModule.FOO 47 assert token.start == 6, token.start 48 assert token.stop == 9, token.stop 49 assert token.text == 'fooo', token.text 50 51 token = lexer.nextToken() 52 assert token.type == self.lexerModule.EOF 53 54 55 def testMalformedInput(self): 56 stream = antlr3.StringStream('2') 57 lexer = self.getLexer(stream) 58 59 try: 60 token = lexer.nextToken() 61 self.fail() 62 63 except antlr3.MismatchedTokenException, exc: 64 self.failUnlessEqual(exc.expecting, 'f') 65 self.failUnlessEqual(exc.unexpectedType, '2') 66 67 68 if __name__ == '__main__': 69 unittest.main() 70 71
