RubyLexerRandomTest.java

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package org.netbeans.modules.ruby.lexer;

import junit.framework.TestCase;
import org.netbeans.lib.lexer.test.FixedTextDescriptor;
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;

/**
 * Test Ruby lexer incremental operation. Based on Java one by Mila Metelka.
 * 
 * Currently does not pass. There appears to be a problem with the command-state flag.
 */
public class RubyLexerRandomTest extends TestCase {

    public RubyLexerRandomTest(String testName) {
        super(testName);
    }
    
    @Override
    protected void setUp() throws java.lang.Exception {
        // Set-up testing environment
        System.setProperty("netbeans.debug.lexer.test", "true");
    }

    public void testRandom() throws Exception {
        // DISABLED -- doesn't work properly!!!
        //test(0);
    }
    
    private void test(long seed) throws Exception {
        TestRandomModify randomModify = new TestRandomModify(seed);
        randomModify.setLanguage(RubyTokenId.language());
        
        //randomModify.setDebugOperation(true);
        //randomModify.setDebugDocumentText(true);
        //randomModify.setDebugHierarchy(true);

        FixedTextDescriptor[] fixedTexts = new FixedTextDescriptor[] {
            FixedTextDescriptor.create("/**/", 0.2),
            FixedTextDescriptor.create("*/", 0.2),
        };
        
        RandomCharDescriptor[] regularChars = new RandomCharDescriptor[] {
            RandomCharDescriptor.letter(0.3),
            RandomCharDescriptor.space(0.3),
            RandomCharDescriptor.lf(0.3),
            RandomCharDescriptor.chars(new char[] { '+', '-', '*', '/'}, 0.3),
        };

        RandomCharDescriptor[] anyChar = new RandomCharDescriptor[] {
            RandomCharDescriptor.anyChar(1.0),
        };

        RandomTextProvider regularTextProvider = new RandomTextProvider(regularChars, fixedTexts);
        RandomTextProvider anyCharTextProvider = new RandomTextProvider(anyChar, fixedTexts);
        
        randomModify.test(
            new RandomModifyDescriptor[] {
                new RandomModifyDescriptor(1000, regularTextProvider,
                        0.2, 0.2, 0.1,
                        0.2, 0.2,
                        0.0, 0.0),
            }
        );

        randomModify.test(
            new RandomModifyDescriptor[] {
                new RandomModifyDescriptor(1000, anyCharTextProvider,
                        0.4, 0.2, 0.2,
                        0.1, 0.1,
                        0.0, 0.0),
                new RandomModifyDescriptor(1000, anyCharTextProvider,
                        0.2, 0.2, 0.1,
                        0.4, 0.3,
                        0.0, 0.0),
            }
        );
    }
}