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.promise;
  
  import io.activej.eventloop.Eventloop;
  import io.activej.reactor.Reactor;
  
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.Future;
  
  public class TestUtils {
  	public static <T> T await(Promise<T> promise) {
  		try {
  			return compute(promise);
  		} catch (ExecutionException e) {
  			throw new AssertionError(e.getCause());
  		}
  	}
  
  	@SafeVarargs
  	public static <T> Void await(Promise<T>... promises) {
  		return await(Promises.all(promises));
  	}
  
  	@SuppressWarnings("unchecked")
  	public static <T, E extends Exception> E awaitException(Promise<T> promise) {
  		try {
  			compute(promise);
  		} catch (ExecutionException e) {
  			return (E) e.getCause();
  		} catch (Exception e) {
  			return (E) e;
  		}
  		throw new AssertionError("Promise did not fail");
  	}
  
  	@SafeVarargs
  	public static <T, E extends Exception> E awaitException(Promise<T>... promises) {
  		return awaitException(Promises.all(promises));
  	}
  
  	private static <T> T compute(Promise<T> promise) throws ExecutionException {
  		Future<T> future = promise.toCompletableFuture();
  		Eventloop eventloop = Reactor.getCurrentReactor();
  		eventloop.run();
  		try {
  			return future.get();
  		} catch (InterruptedException e) {
  			Thread.currentThread().interrupt();
  			throw new AssertionError(e);
  		}
  	}
  }
  