java/java.lexer/test/unit/src/org/netbeans/lib/java/lexer/JavaFlyTokensTest.java

/*
 * 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.netbeans.lib.java.lexer;

import java.io.File;
import java.io.FileReader;
import java.nio.ByteOrder;
import java.nio.CharBuffer;
import org.netbeans.api.java.lexer.JavaTokenId;
import org.netbeans.api.lexer.TokenHierarchy;
import org.netbeans.api.lexer.TokenId;
import org.netbeans.api.lexer.TokenSequence;
import org.netbeans.junit.NbTestCase;
import org.netbeans.lib.lexer.test.LexerTestUtilities;

/**
 * Test how many flyweight tokens gets created over a typical java source
 * (copy of javax.swing.JComponent is used).
 *
 * @author mmetelka
 */
public class JavaFlyTokensTest extends NbTestCase {
    
    public JavaFlyTokensTest(String testName) {
        super(testName);
    }
    
    protected void setUp() throws java.lang.Exception {
        // Set-up testing environment
        LexerTestUtilities.setTesting(true);
    }

    protected void tearDown() throws java.lang.Exception {
    }

    public void test() throws Exception {
        File testJComponentFile = new File(getDataDir() + "/testfiles/JComponent.java.txt");
        FileReader r = new FileReader(testJComponentFile);
        int fileLen = (int)testJComponentFile.length();
        CharBuffer cb = CharBuffer.allocate(fileLen);
        r.read(cb);
        cb.rewind();
        String text = cb.toString();
        TokenHierarchy<?> hi = TokenHierarchy.create(text, JavaTokenId.language());
        TokenSequence<?> ts = hi.tokenSequence();
        
        System.err.println("Flyweight tokens: " + LexerTestUtilities.flyweightTokenCount(ts)
                + "\nTotal tokens: " + ts.tokenCount()
                + "\nFlyweight text length: " + LexerTestUtilities.flyweightTextLength(ts)
                + "\nTotal text length: " + fileLen
                + "\nDistribution: " + LexerTestUtilities.flyweightDistribution(ts)
        );

        assertEquals(LexerTestUtilities.flyweightTokenCount(ts), 13786);
        assertEquals(LexerTestUtilities.flyweightTextLength(ts), 21710);
        assertEquals(ts.tokenCount(), 21379);
        
    }
    
}