OneShotLatchTest.java

/*
 * 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
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 */

package org.apache.flink.core.testutils;

import org.junit.Test;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

public class OneShotLatchTest {

	@Test
	public void testAwaitWithTimeout() throws Exception {
		OneShotLatch latch = new OneShotLatch();
		assertFalse(latch.isTriggered());

		try {
			latch.await(1, TimeUnit.MILLISECONDS);
			fail("should fail with a TimeoutException");
		} catch (TimeoutException e) {
			// expected
		}

		assertFalse(latch.isTriggered());

		latch.trigger();
		assertTrue(latch.isTriggered());

		latch.await(100, TimeUnit.DAYS);
		assertTrue(latch.isTriggered());

		latch.await(0, TimeUnit.MILLISECONDS);
		assertTrue(latch.isTriggered());
	}
}