/*******************************************************************************
 * Copyright (c) 2000, 2020 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.jdt.debug.tests.core;

import java.io.File;
import java.io.OutputStream;

import org.eclipse.core.runtime.Platform;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.ILaunchManager;
import org.eclipse.debug.core.Launch;
import org.eclipse.debug.core.model.ILineBreakpoint;
import org.eclipse.debug.core.model.IProcess;
import org.eclipse.jdt.debug.core.IJavaThread;
import org.eclipse.jdt.debug.tests.AbstractDebugTest;

/**
 * Tests IProcess.
 */
public class ProcessTests extends AbstractDebugTest {

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

	public void testExitValueNormal() throws Exception {
		String typeName = "Breakpoints";
		ILineBreakpoint bp = createLineBreakpoint(46, typeName);

		IJavaThread thread= null;
		try {
			thread= launchToLineBreakpoint(typeName, bp);

			IProcess process = thread.getDebugTarget().getProcess();
			assertNotNull("Missing process", process);
			int exitValue = -1;
			try {
				exitValue = process.getExitValue();
			} catch (DebugException e) {
				exit(thread);
				exitValue = process.getExitValue();
				assertEquals("Exit value not normal", 0, exitValue);
				return;
			}
			assertTrue("Should not be able to get exit value - process not terminated", false);
		} finally {
			terminateAndRemove(thread);
			removeAllBreakpoints();
		}
	}

	/**
	 * Tests that an already terminated java.lang.Process behaves properly when
	 * wrapped in an IProcess.
	 *
	 * @throws Exception
	 */
	public void testAlreadyTerminatedProcess() throws Exception {
		Process process;
		if (Platform.getOS().equals(Platform.OS_LINUX)) {
			// printing env command
			{
				Process p = Runtime.getRuntime().exec("env");
				OutputStream processOut = p.getOutputStream();
				Thread.sleep(500);
				processOut.flush();

			}
			process = DebugPlugin.exec(new String[] { "java" }, new File("/tmp"));
		} else {
			process = DebugPlugin.exec(new String[] { "java" }, null);
		}

		boolean terminated = false;
		int value = -1;
		while (!terminated) {
			try {
				value = process.exitValue();
				terminated = true;
			} catch (IllegalThreadStateException e) {
				int n = process.getInputStream().available();
				if (n > 0) { // avoid reading if nothing available to prevent Bug 545326
					process.getInputStream().skip(n);
				}
				n = process.getErrorStream().available();
				if (n > 0) {
					process.getErrorStream().skip(n);
				}
				Thread.sleep(500);
			}
		}
		Launch launch = new Launch(null, ILaunchManager.RUN_MODE, null);
		IProcess iProcess = DebugPlugin.newProcess(launch, process, "Testing123");
		assertTrue("Process should be terminated", iProcess.isTerminated());
		assertEquals("Wrong exit value", value, iProcess.getExitValue());
	}
}