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62 lines
1.7 KiB
62 lines
1.7 KiB
import antlr3
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import testbase
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import unittest
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class t006lexer(testbase.ANTLRTest):
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def setUp(self):
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self.compileGrammar()
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def lexerClass(self, base):
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class TLexer(base):
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def emitErrorMessage(self, msg):
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# report errors to /dev/null
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pass
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def reportError(self, re):
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# no error recovery yet, just crash!
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raise re
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return TLexer
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def testValid(self):
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stream = antlr3.StringStream('fofaaooa')
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lexer = self.getLexer(stream)
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token = lexer.nextToken()
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assert token.type == self.lexerModule.FOO
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assert token.start == 0, token.start
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assert token.stop == 1, token.stop
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assert token.text == 'fo', token.text
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token = lexer.nextToken()
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assert token.type == self.lexerModule.FOO
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assert token.start == 2, token.start
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assert token.stop == 7, token.stop
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assert token.text == 'faaooa', token.text
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token = lexer.nextToken()
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assert token.type == self.lexerModule.EOF
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def testMalformedInput(self):
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stream = antlr3.StringStream('fofoaooaoa2')
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lexer = self.getLexer(stream)
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lexer.nextToken()
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lexer.nextToken()
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try:
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token = lexer.nextToken()
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raise AssertionError, token
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except antlr3.MismatchedTokenException, exc:
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assert exc.expecting == 'f', repr(exc.expecting)
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assert exc.unexpectedType == '2', repr(exc.unexpectedType)
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assert exc.charPositionInLine == 10, repr(exc.charPositionInLine)
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assert exc.line == 1, repr(exc.line)
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if __name__ == '__main__':
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unittest.main()
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