GMLInterpreterTest.java 文件源码

@Test
public void twelveFactorial() throws IOException {
    final GMLLexer gmlLexer = new GMLLexer(new ANTLRInputStream(getClass().getResourceAsStream("fact.gml")));
    final GMLParser gmlParser = new GMLParser(new CommonTokenStream(gmlLexer));
    gmlParser.addErrorListener(new BaseErrorListener() {

        @Override
        public void syntaxError(final Recognizer<?, ?> theRecognizer, final Object theOffendingSymbol, final int theLine,
                final int theCharPositionInLine, final String theMsg, final RecognitionException theE) {
            Assert.fail(theMsg);
        }

    });
    final GMLExtractor gmlExtractor = new GMLExtractor(gmlParser);
    final GMLInterpreter gmlInterpreter = new GMLInterpreter(gmlExtractor);
    final Stack<Token> tokenStack = gmlInterpreter.interpret();
    Assert.assertEquals(tokenStack.size(), 1);
    final NumberToken result = (NumberToken) tokenStack.pop();
    Assert.assertEquals(result.getValue(), 479001600d);
}