com.gwtplatform.tester.AsyncMockProvider Maven / Gradle / Ivy
/**
* Copyright 2011 ArcBees Inc.
*
* 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 com.gwtplatform.tester;
import com.google.gwt.inject.client.AsyncProvider;
import com.google.gwt.user.client.rpc.AsyncCallback;
/**
* For use in test cases where an {@link AsyncProvider} is required to provide
* an object and the test case needs to provide a mock of the object.
*
* Note that the same mock will be returned for every invocation of of {@link #get(AsyncCallback)}
* (it behaves as a singleton) which may impact your tests, for example
* if you rely on {@code ==}. If you're using mockito, consider using the
* {@link com.gwtplatform.tester.mockito.AsyncMockProvider AsyncMockProvider} instead.
*
* @param The type of mock object provided
* @author Brendan Doherty
*/
public class AsyncMockProvider implements AsyncProvider {
private final T mock;
private final Throwable error;
/**
* Construct a {@link AsyncProvider} that will provide the mock object.
*
* @param mock The mock object to provide.
*/
public AsyncMockProvider(T mock) {
this.mock = mock;
this.error = null;
}
/**
* Construct a {@link AsyncProvider} that will fail to provide the mock
* object, and will fail with the specified error.
*
* @param error The error to fail with, a {@link Throwable}.
*/
public AsyncMockProvider(Throwable error) {
this.mock = null;
this.error = error;
}
@Override
public void get(AsyncCallback callback) {
if (this.error != null) {
callback.onFailure(error);
} else {
callback.onSuccess(this.mock);
}
}
}