1 import antlr3 2 import testbase 3 import unittest 4 5 class t005lexer(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('fofoofooo') 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 == 1, token.stop 31 assert token.text == 'fo', token.text 32 33 token = lexer.nextToken() 34 assert token.type == self.lexerModule.FOO 35 assert token.start == 2, token.start 36 assert token.stop == 4, token.stop 37 assert token.text == 'foo', token.text 38 39 token = lexer.nextToken() 40 assert token.type == self.lexerModule.FOO 41 assert token.start == 5, token.start 42 assert token.stop == 8, token.stop 43 assert token.text == 'fooo', token.text 44 45 token = lexer.nextToken() 46 assert token.type == self.lexerModule.EOF 47 48 49 def testMalformedInput1(self): 50 stream = antlr3.StringStream('2') 51 lexer = self.getLexer(stream) 52 53 try: 54 token = lexer.nextToken() 55 raise AssertionError 56 57 except antlr3.MismatchedTokenException, exc: 58 assert exc.expecting == 'f', repr(exc.expecting) 59 assert exc.unexpectedType == '2', repr(exc.unexpectedType) 60 61 62 def testMalformedInput2(self): 63 stream = antlr3.StringStream('f') 64 lexer = self.getLexer(stream) 65 66 try: 67 token = lexer.nextToken() 68 raise AssertionError 69 70 except antlr3.EarlyExitException, exc: 71 assert exc.unexpectedType == antlr3.EOF, repr(exc.unexpectedType) 72 73 74 if __name__ == '__main__': 75 unittest.main() 76
