/*
* Copyright 2013 Julien Viet
*
* 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 viet.promises;
import org.junit.Test;
import vietj.promises.Deferred;
import java.util.Arrays;
import java.util.LinkedList;
import static org.junit.Assert.*;
/** @author Julien Viet */
public class ExecuteInOrderTestCase {
@Test
public void testAllRespectiveFulfilledCallbacksMustExecuteInTheOrderOfTheirOriginatingCallsToThen() {
LinkedList<Integer> callbacks = new LinkedList<Integer>();
Deferred<String> deferred = new Deferred<String>();
deferred.promise.then(Callbacks.<String, Integer>addToHandler(callbacks, 1));
deferred.promise.then(Callbacks.<String, Integer>addToHandler(callbacks, 2));
deferred.resolve("");
assertEquals(Arrays.asList(1, 2), callbacks);
}
@Test
public void testAllRespectiveRejectedCallbacksMustExecuteInTheOrderOfTheirOriginatingCallsToThen() {
LinkedList<Integer> callbacks = new LinkedList<Integer>();
Deferred<String> deferred = new Deferred<String>();
deferred.promise.then(Callbacks.<String>nullHandler(), Callbacks.<Exception, Integer>addToHandler(callbacks, 1));
deferred.promise.then(Callbacks.<String>nullHandler(), Callbacks.<Exception, Integer>addToHandler(callbacks, 2));
deferred.reject(new Exception());
assertEquals(Arrays.asList(1, 2), callbacks);
}
@Test
public void testReturnedPromiseMustBeRejectWithSameReasonWhenOnFulfilledThrowsAnException() {
LinkedList<String> done = new LinkedList<String>();
LinkedList<Exception> failed = new LinkedList<Exception>();
Deferred<Integer> deferred = new Deferred<Integer>();
Exception e = new Exception();
deferred.promise.
then(Callbacks.<Integer>throwHandler(e), Callbacks.<Exception>throwHandler()).
then(Callbacks.<Void, String>addToHandler(done, "abc"), Callbacks.addToHandler(failed));
deferred.resolve(3);
assertEquals(Arrays.<String>asList(), done);
assertEquals(Arrays.asList(e), failed);
}
@Test
public void testReturnedPromiseMustBeRejectWithSameReasonWhenOnRejectedThrowsAnException() {
LinkedList<String> done = new LinkedList<String>();
LinkedList<Exception> failed = new LinkedList<Exception>();
Deferred<Integer> deferred = new Deferred<Integer>();
Exception e = new Exception();
deferred.promise.
then(Callbacks.<Integer>throwHandler(), Callbacks.<Exception>throwHandler(e)).
then(Callbacks.<Void, String>addToHandler(done, "abc"), Callbacks.addToHandler(failed));
deferred.reject(new Exception());
assertEquals(Arrays.<String>asList(), done);
assertEquals(Arrays.asList(e), failed);
}
@Test
public void testReturnedPromiseMustBeRejectedWithSameValueWhenOnRejectedIsNotAFunction() {
LinkedList<String> done = new LinkedList<String>();
LinkedList<Exception> failed = new LinkedList<Exception>();
Deferred<String> deferred = new Deferred<String>();
deferred.promise.then(Callbacks.<String>id()).then(Callbacks.addToHandler(done), Callbacks.addToHandler(failed));
Exception e = new Exception();
deferred.reject(e);
assertEquals(Arrays.asList(e), failed);
}
}