/*
* 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.apache.geode.test.process;
import static org.junit.Assert.*;
import static org.junit.contrib.java.lang.system.TextFromStandardInputStream.*;
import java.lang.reflect.Method;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.contrib.java.lang.system.TextFromStandardInputStream;
import org.junit.experimental.categories.Category;
import org.apache.geode.test.junit.categories.UnitTest;
/**
* Quick sanity tests to make sure MainLauncher is functional.
*/
@Category(UnitTest.class)
public class MainLauncherJUnitTest {
private static final long TIMEOUT_SECONDS = 10;
private static volatile boolean flag = false;
private final String launchedClass = getClass().getName();
private ExecutorService futures;
@Rule
public final TextFromStandardInputStream systemInMock = emptyStandardInputStream();
@Before
public void before() {
flag = false;
this.futures = Executors.newSingleThreadExecutor();
assertFalse(flag);
}
@After
public void after() {
flag = false;
assertTrue(this.futures.shutdownNow().isEmpty());
}
@Test
public void testInvokeMainWithNullArgs() throws Exception {
Class<?> clazz = getClass();
Method mainMethod = clazz.getMethod("main", String[].class);
String[] args = null;
mainMethod.invoke(null, new Object[] {args});
assertTrue(flag);
}
@Test
public void testInvokeMainWithEmptyArgs() throws Exception {
Class<?> clazz = getClass();
Method mainMethod = clazz.getMethod("main", String[].class);
String[] args = new String[0];
mainMethod.invoke(null, new Object[] {args});
assertTrue(flag);
}
@Test
public void testInvokeMainWithOneArg() throws Exception {
Class<?> clazz = getClass();
Method mainMethod = clazz.getMethod("main", String[].class);
String[] args = new String[] {"arg0"};
mainMethod.invoke(null, new Object[] {args});
assertTrue(flag);
}
@Test
public void testInvokeMainWithTwoArgs() throws Exception {
Class<?> clazz = getClass();
Method mainMethod = clazz.getMethod("main", String[].class);
String[] args = new String[] {"arg0", "arg1"};
mainMethod.invoke(null, new Object[] {args});
assertTrue(flag);
}
@Test
public void testInvokeMainWithMainLauncherWithNoArgs() throws Exception {
Future<Boolean> future = this.futures.submit(new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
Class<?> clazz = MainLauncher.class;
Method mainMethod = clazz.getMethod("main", String[].class);
String[] args = new String[] {launchedClass};
mainMethod.invoke(null, new Object[] {args}); // this will block until "\n" is fed to
// System.in
return true;
}
});
systemInMock.provideText("\n");
assertTrue(future.get(TIMEOUT_SECONDS, TimeUnit.SECONDS));
assertTrue(flag);
}
@Test
public void testInvokeMainWithMainLauncherWithOneArg() throws Exception {
Future<Boolean> future = this.futures.submit(new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
Class<?> clazz = MainLauncher.class;
Method mainMethod = clazz.getMethod("main", String[].class);
String[] args = new String[] {launchedClass, "arg0"};
mainMethod.invoke(null, new Object[] {args});
return true;
}
});
systemInMock.provideText("\n");
assertTrue(future.get(TIMEOUT_SECONDS, TimeUnit.SECONDS));
assertTrue(flag);
}
@Test
public void testInvokeMainWithMainLauncherWithTwoArgs() throws Exception {
Future<Boolean> future = this.futures.submit(new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
Class<?> clazz = MainLauncher.class;
Method mainMethod = clazz.getMethod("main", String[].class);
String[] args = new String[] {launchedClass, "arg0", "arg1"};
mainMethod.invoke(null, new Object[] {args});
return true;
}
});
systemInMock.provideText("\n");
assertTrue(future.get(TIMEOUT_SECONDS, TimeUnit.SECONDS));
assertTrue(flag);
}
public static void main(String... args) throws Exception {
flag = true;
}
}