1 import antlr3 2 import testbase 3 import unittest 4 5 class t008lexer(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('ffaf') 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 == 'fa', 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 == 3, token.stop 43 assert token.text == 'f', token.text 44 45 token = lexer.nextToken() 46 assert token.type == self.lexerModule.EOF 47 48 49 def testMalformedInput(self): 50 stream = antlr3.StringStream('fafb') 51 lexer = self.getLexer(stream) 52 53 lexer.nextToken() 54 lexer.nextToken() 55 try: 56 token = lexer.nextToken() 57 raise AssertionError, token 58 59 except antlr3.MismatchedTokenException, exc: 60 assert exc.unexpectedType == 'b', repr(exc.unexpectedType) 61 assert exc.charPositionInLine == 3, repr(exc.charPositionInLine) 62 assert exc.line == 1, repr(exc.line) 63 64 65 if __name__ == '__main__': 66 unittest.main() 67
