lrparser/org.eclipse.cdt.core.lrparser.tests/src/org/eclipse/cdt/core/lrparser/tests/AbstractLRHangingTest.java

/*******************************************************************************
 *  Copyright (c) 2010, 2015 IBM Corporation and others.
 *
 *  This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License 2.0
 *  which accompanies this distribution, and is available at
 *  https://www.eclipse.org/legal/epl-2.0/
 *
 *  SPDX-License-Identifier: EPL-2.0
 *
 *  Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.core.lrparser.tests;

import org.eclipse.cdt.core.dom.ast.IASTCompletionNode;
import org.eclipse.cdt.core.dom.lrparser.gnu.GCCLanguage;
import org.eclipse.cdt.core.dom.lrparser.gnu.GPPLanguage;
import org.eclipse.cdt.core.model.ILanguage;

import junit.framework.TestCase;

public class AbstractLRHangingTest extends TestCase {

	public AbstractLRHangingTest() {
	}

	public AbstractLRHangingTest(String name) {
		super(name);
	}

	protected ILanguage getCLanguage() {
		return GCCLanguage.getDefault();
	}

	protected ILanguage getCPPLanguage() {
		return GPPLanguage.getDefault();
	}

	protected void runThreadByLimitedTime(long limitTime, Thread testThread) throws Exception {
		testThread.start();
		testThread.join(limitTime);

		if (testThread.isAlive()) {
			testThread.interrupt();
			fail("timeout by " + limitTime / 1000 + " seconds"); //$NON-NLS-2$
		} else {
			// Finished
		}
	}

	// 1mins
	public static long THREAD_TIMEOUT_LIMIT = 1 * 60 * 1000;
	public static String CONTENT_ASIST_CURSOR = " /*<ctrl-space>*/ ";

	private String errMsg = "";

	public void resetErrMsg() {
		errMsg = "";
	}

	public void setErrMsg(String errMsg) {
		this.errMsg = errMsg;
	}

	protected void runTestCase(final String code, final ILanguage language) throws Exception {

		Thread testThread = new Thread() {

			@Override
			public void run() {

				String errMsg = "";
				resetErrMsg();
				String msg = null;
				int offset = code.indexOf(CONTENT_ASIST_CURSOR);
				int index = 0;
				while (offset >= 0) {

					IASTCompletionNode node = null;
					try {
						node = ParseHelper.getCompletionNode(code, language, offset);
					} catch (Exception e) {
						if (errMsg.length() == 0) {
							errMsg = "caught an exception when the code is parsed for cursor number " + index;
						} else {
							errMsg = errMsg + "\n" + "caught an exception when the code is parsed for cursor number "
									+ index;
						}

					}
					if (node == null) {
						if (errMsg.length() == 0) {
							errMsg = "return completion node is null when the code is parsed for cursor number "
									+ index;
						} else {
							errMsg = errMsg + "\n"
									+ "return completion node is null when the code is parsed for cursor number "
									+ index;
						}

					}
					offset = code.indexOf(CONTENT_ASIST_CURSOR, offset + 1);
					index++;
				}
				setErrMsg(errMsg);

			}

		};

		runThreadByLimitedTime(THREAD_TIMEOUT_LIMIT, testThread);
		if (errMsg.length() > 0) {
			//fail(errMsg);
		}

	}

}