content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * Licensed 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 io.activej.test.rules;
  
  import io.activej.eventloop.Eventloop;
  import io.activej.reactor.Reactor;
  import org.junit.rules.TestRule;
  import org.junit.runner.Description;
  import org.junit.runners.model.Statement;
  
  import static io.activej.common.exception.FatalErrorHandlers.rethrow;
  
  /**
   * {@link TestRule} that creates an eventloop and sets it to ThreadLocal
   */
  public final class EventloopRule implements TestRule {
  
  	static {
  		createEventloop();
  	}
  
  	private static void createEventloop() {
  		Eventloop.builder()
  			.withCurrentThread()
  			.withFatalErrorHandler(rethrow())
  			.build();
  	}
  
  	@Override
  	public Statement apply(Statement base, Description description) {
  		Reactor currentReactor = Reactor.getCurrentReactor();
  		if (!(currentReactor instanceof Eventloop) || !currentReactor.inReactorThread()) {
  			createEventloop();
  		}
  		return base;
  	}
  }
  