enterprise/el.lexer/test/unit/src/org/netbeans/modules/el/lexer/ELLexerRandomTest.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.modules.el.lexer;

import junit.framework.TestCase;
import org.netbeans.lib.lexer.test.FixedTextDescriptor;
import org.netbeans.lib.lexer.test.LexerTestUtilities;
import org.netbeans.lib.lexer.test.RandomCharDescriptor;
import org.netbeans.lib.lexer.test.RandomModifyDescriptor;
import org.netbeans.lib.lexer.test.RandomTextProvider;
import org.netbeans.lib.lexer.test.TestRandomModify;
import org.netbeans.modules.el.lexer.api.ELTokenId;

/**
 * Test several simple lexer impls.
 *
 * @author mmetelka
 */
public class ELLexerRandomTest extends TestCase {
    
    public ELLexerRandomTest(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 testRandom() throws Exception {
        test(0);
    }
    
    private void test(long seed) throws Exception {
        TestRandomModify randomModify = new TestRandomModify(seed);
        randomModify.setLanguage(ELTokenId.language());
        
        //randomModify.setDebugOperation(true);
        //randomModify.setDebugDocumentText(true);
        //randomModify.setDebugHierarchy(true);

        // Explicit inserts/removals checks
        randomModify.insertText(0, "(");
        randomModify.insertText(1, "1");
        randomModify.insertText(2, "2");
        randomModify.insertText(3, ")");
        randomModify.insertText(2, "+");
        randomModify.removeText(2, 1);
        randomModify.insertText(2, "-");
        
        randomModify.clearDocument();
        
        // Begin really randomized testing
        FixedTextDescriptor[] fixedTexts = new FixedTextDescriptor[] {
            FixedTextDescriptor.create(" ", 0.2),
        };
        
        RandomCharDescriptor[] regularChars = new RandomCharDescriptor[] {
            RandomCharDescriptor.digit(0.2),
            RandomCharDescriptor.space(0.2),
            RandomCharDescriptor.chars(new char[] { '+', '-', '(', ')' }, 0.3),
        };

        RandomTextProvider regularTextProvider = new RandomTextProvider(regularChars, fixedTexts);
        
        randomModify.test(
            new RandomModifyDescriptor[] {
                new RandomModifyDescriptor(20, regularTextProvider,
                        0.4, 0.2, 0.2,
                        0.1, 0.1,
                        0.0, 0.0), // snapshots create/destroy
                new RandomModifyDescriptor(20, regularTextProvider,
                        0.2, 0.2, 0.1,
                        0.4, 0.3,
                        0.0, 0.0), // snapshots create/destroy
            }
        );
    }
    
}