com.gwtplatform.tester.MockingBinder 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 java.lang.reflect.Field;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
/**
* {@link MockingBinder} makes testing view even easier by mocking every
* {@link UiField} and returning a mocked object upon creation.
*
* To use it, you should build a small class that extends MockingBinder and bind
* that class inside your Guice test module. You will have to provide a
* {@link MockFactory} to let MockingBinder mock everything.
*
* Ex:
*
*
* public static class Module extends JukitoModule {
* static class MyTestBinder extends MockingBinder<Widget, BlogView> implements
* Binder {
* public MyTestBinder(final AnyMockFactory anyMockFactory) {
* super(Widget.class, anyMockFactory);
* }
* }
*
* protected void configureTest() {
* GWTMockUtilities.disarm();
*
* bind(Binder.class).to(MyTestBinder.class);
* }
* }
*
*
* Disarming GWT is important to unit test views.
*
* @param Mock type returned by {@link UiBinder#createAndBindUi(Object)}.
* @param Owner type.
*
* @author Christian Goudreau
*/
public abstract class MockingBinder implements UiBinder {
private final Class returnTypeClass;
private final MockFactory mockFactory;
/**
* @param returnTypeClass Type to return when creating the mocked ui.
* @param mockFactory A {@link MockFactory} to provide mock object.
*/
public MockingBinder(final Class returnTypeClass,
final MockFactory mockFactory) {
this.returnTypeClass = returnTypeClass;
this.mockFactory = mockFactory;
}
@Override
public U createAndBindUi(O owner) throws IllegalArgumentException {
Field[] fields = owner.getClass().getDeclaredFields();
for (Field field : fields) {
field.setAccessible(true);
if (field.isAnnotationPresent(UiField.class)) {
Object mockObject = mockFactory.mock(field.getType());
try {
field.set(owner, mockObject);
} catch (IllegalAccessException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
}
return mockFactory.mock(returnTypeClass);
}
}