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DittoTestSystem.java
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DittoTestSystem.java
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/*
* Copyright (c) 2019 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.base.model.signals;
import org.apache.pekko.actor.ActorSystem;
import org.apache.pekko.testkit.javadsl.TestKit;
/**
* Manage creation and termination of actor systems for tests.
*/
public final class DittoTestSystem implements AutoCloseable {
private final ActorSystem actorSystem;
private DittoTestSystem(final ActorSystem actorSystem) {
this.actorSystem = actorSystem;
}
/**
* Run a unit test in its own actor system and test kit.
*
* @param test the JUnit test object.
* @param assertions the assertions to run.
*/
public static void run(final Object test, final TestConsumer assertions) {
final String actorSystemName = test.getClass().getSimpleName();
try (final DittoTestSystem testSystem = new DittoTestSystem(ActorSystem.create(actorSystemName))) {
new TestKit(testSystem.actorSystem) {{
assertions.accept(this);
}};
} catch (final Exception e) {
throw new AssertionError(e);
}
}
@Override
public void close() throws Exception {
TestKit.shutdownActorSystem(actorSystem);
}
/**
* Interface for test code.
*/
@FunctionalInterface
public interface TestConsumer {
/**
* Consume an argument with the potential to throw any exception.
*
* @param testKit the test kit.
* @throws Exception if anything went wrong.
*/
void accept(final TestKit testKit) throws Exception;
}
}