| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cassandra.cql3; |
| |
| import org.junit.Test; |
| |
| import org.antlr.runtime.ANTLRStringStream; |
| import org.antlr.runtime.BaseRecognizer; |
| import org.antlr.runtime.CharStream; |
| import org.antlr.runtime.CommonTokenStream; |
| import org.antlr.runtime.RecognitionException; |
| import org.antlr.runtime.TokenStream; |
| |
| import static org.junit.Assert.*; |
| |
| public class CqlParserTest |
| { |
| @Test |
| public void testAddErrorListener() throws Exception |
| { |
| SyntaxErrorCounter firstCounter = new SyntaxErrorCounter(); |
| SyntaxErrorCounter secondCounter = new SyntaxErrorCounter(); |
| |
| CharStream stream = new ANTLRStringStream("SELECT * FORM users"); |
| CqlLexer lexer = new CqlLexer(stream); |
| |
| TokenStream tokenStream = new CommonTokenStream(lexer); |
| CqlParser parser = new CqlParser(tokenStream); |
| parser.addErrorListener(firstCounter); |
| parser.addErrorListener(secondCounter); |
| |
| parser.query(); |
| |
| // ANTLR 3.5 reports 2 errors in the sentence above (missing FROM and missing EOF). |
| assertTrue(firstCounter.count > 0); |
| assertTrue(secondCounter.count > 0); |
| } |
| |
| @Test |
| public void testRemoveErrorListener() throws Exception |
| { |
| SyntaxErrorCounter firstCounter = new SyntaxErrorCounter(); |
| SyntaxErrorCounter secondCounter = new SyntaxErrorCounter(); |
| |
| CharStream stream = new ANTLRStringStream("SELECT * FORM test;"); |
| CqlLexer lexer = new CqlLexer(stream); |
| |
| TokenStream tokenStream = new CommonTokenStream(lexer); |
| CqlParser parser = new CqlParser(tokenStream); |
| parser.addErrorListener(firstCounter); |
| parser.addErrorListener(secondCounter); |
| parser.removeErrorListener(secondCounter); |
| |
| parser.query(); |
| |
| assertTrue(firstCounter.count > 0); |
| assertEquals(0, secondCounter.count); |
| } |
| |
| private static final class SyntaxErrorCounter implements ErrorListener |
| { |
| private int count; |
| |
| @Override |
| public void syntaxError(BaseRecognizer recognizer, String[] tokenNames, RecognitionException e) |
| { |
| count++; |
| } |
| |
| @Override |
| public void syntaxError(BaseRecognizer recognizer, String errorMsg) |
| { |
| count++; |
| } |
| } |
| } |