tests/org.eclipse.ldt.core.tests/src/org/eclipse/ldt/core/tests/internal/ast/TestMultipleParsing.java

/*******************************************************************************
 * Copyright (c) 2011 Sierra Wireless and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Sierra Wireless - initial API and implementation
 *******************************************************************************/
package org.eclipse.ldt.core.tests.internal.ast;

import junit.framework.TestCase;

import org.eclipse.dltk.ast.parser.ISourceParser;
import org.eclipse.dltk.compiler.env.ModuleSource;
import org.eclipse.ldt.core.internal.ast.parser.LuaSourceParserFactory;
import org.eclipse.ldt.core.tests.internal.ast.utils.DummyReporter;

/**
 * Just checks if it is safe to parse several sources file simultaneously
 */
public class TestMultipleParsing extends TestCase {

	/** Increase this counter, in order to test harder */
	private static final int THREAD_COUNT = 5;

	private static class Parsing extends Thread {
		@Override
		public void run() {
			final String code = "do local var= 21 var = 22 end set = 12 while true do set = 0 end repeat set = 1 until true for k = 1,10 do set = 2  end " //$NON-NLS-1$
					+ "for k = 1,10,2 do set = 2  end for k,i in  12,15  do set =3 end local z = var or {} local var, v local c = nil local var = 12, 0 " //$NON-NLS-1$
					+ "local function var (o) end while true or false do return end while 1 do return one end while 1 do return one, two end call({}) " //$NON-NLS-1$
					+ "recall(-12) recall(true, false) local mod mod:sample() mod:sample('yop') mod:sample('yop', ...) if true then call() end " //$NON-NLS-1$
					+ "if true then call() else recall() end local tab = {} local tab = { var = 12, 3+0 } if true then yop() end if false then raplapla() else yop() end " //$NON-NLS-1$
					+ "if true then yop() elseif false then callThePolice() end if true then yop() elseif false then callThePolice() else hangUp() end no =function()end " //$NON-NLS-1$
					+ "function another() end function par( x, ... ) end function par( ra, me, tres, ...)end function par( o ) return o end"; //$NON-NLS-1$
			ISourceParser parser = new LuaSourceParserFactory().createSourceParser();
			ModuleSource input = new ModuleSource(code);
			parser.parse(input, new DummyReporter());
		}
	}

	public void testMultipleParsing() {

		// Create several threads
		Thread[] threads = new Thread[THREAD_COUNT];
		for (int k = 0; k < THREAD_COUNT; k++) {
			threads[k] = new Parsing();
		}

		// Activate all of them, they will start to use LuaJava randomly
		for (Thread thread : threads) {
			thread.start();
		}

		// Check if all threads terminate gently
		int count = 0;
		for (Thread thread : threads) {
			try {
				thread.join();
				count++;
			} catch (InterruptedException e) {
				fail(e.getMessage());
			}
		}
		assertEquals("A thread encounter an error", count, THREAD_COUNT); //$NON-NLS-1$
	}

}