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79 lines
2.3 KiB
79 lines
2.3 KiB
import antlr3
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import testbase
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import unittest
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class t010lexer(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('foobar _Ab98 \n A12sdf')
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lexer = self.getLexer(stream)
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token = lexer.nextToken()
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self.assertEqual(token.type, self.lexerModule.IDENTIFIER)
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self.assertEqual(token.start, 0)
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self.assertEqual(token.stop, 5)
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self.assertEqual(token.text, 'foobar')
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token = lexer.nextToken()
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self.assertEqual(token.type, self.lexerModule.WS)
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self.assertEqual(token.start, 6)
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self.assertEqual(token.stop, 6)
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self.assertEqual(token.text, ' ')
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token = lexer.nextToken()
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self.assertEqual(token.type, self.lexerModule.IDENTIFIER)
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self.assertEqual(token.start, 7)
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self.assertEqual(token.stop, 11)
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self.assertEqual(token.text, '_Ab98')
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token = lexer.nextToken()
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self.assertEqual(token.type, self.lexerModule.WS)
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self.assertEqual(token.start, 12)
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self.assertEqual(token.stop, 14)
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self.assertEqual(token.text, ' \n ')
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token = lexer.nextToken()
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self.assertEqual(token.type, self.lexerModule.IDENTIFIER)
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self.assertEqual(token.start, 15)
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self.assertEqual(token.stop, 20)
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self.assertEqual(token.text, 'A12sdf')
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token = lexer.nextToken()
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self.assertEqual(token.type, self.lexerModule.EOF)
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def testMalformedInput(self):
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stream = antlr3.StringStream('a-b')
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lexer = self.getLexer(stream)
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lexer.nextToken()
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try:
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token = lexer.nextToken()
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self.fail(token)
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except antlr3.NoViableAltException as exc:
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self.assertEqual(exc.unexpectedType, '-')
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self.assertEqual(exc.charPositionInLine, 1)
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self.assertEqual(exc.line, 1)
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if __name__ == '__main__':
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unittest.main()
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