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/*****************************************************************************
* Copyright (c) 2013 CEA LIST and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* CEA LIST - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.infra.core.utils;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.not;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.junit.Assert.*;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.emf.common.notify.Notifier;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EcoreFactory;
import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.junit.Test;
import com.google.common.base.Optional;
/**
* Tests for the {@link AdapterUtils} class.
*/
public class AdapterUtilsTest {
@Test
public void testAdaptInstanceOptionalPresent() {
String foo = "foo";
assertThat(AdapterUtils.adapt(foo, String.class), isPresent(String.class));
}
@Test
public void testAdaptAdaptableOptionalPresent() {
String foo = "foo";
assertThat(AdapterUtils.adapt(new AdaptableWrapper(foo), String.class), isPresent(String.class));
}
@Test
public void testAdaptEMFOptionalPresent() {
EObject obj = EcoreFactory.eINSTANCE.createEObject();
new EMFAdapter(obj);
assertThat(AdapterUtils.adapt(obj, EMFAdapter.class), isPresent(EMFAdapter.class));
}
@Test
public void testAdaptInstanceOptionalNull() {
String foo = "foo";
assertThat(AdapterUtils.adapt(foo, Integer.class), isNull(Integer.class));
}
@Test
public void testAdaptAdaptableOptionalNull() {
String foo = "foo";
assertThat(AdapterUtils.adapt(new AdaptableWrapper(foo), Integer.class), isNull(Integer.class));
}
@Test
public void testAdaptEMFOptionalNull() {
EObject obj = EcoreFactory.eINSTANCE.createEObject();
assertThat(AdapterUtils.adapt(obj, EMFAdapter.class), isNull(EMFAdapter.class));
}
@Test
public void testAdaptInstanceDefaultPresent() {
String foo = "foo";
assertThat(AdapterUtils.adapt(foo, String.class, null), is(foo));
}
@Test
public void testAdaptAdaptableDefaultPresent() {
String foo = "foo";
assertThat(AdapterUtils.adapt(new AdaptableWrapper(foo), String.class, null), is(foo));
}
@Test
public void testAdaptEMFDefaultPresent() {
EObject obj = EcoreFactory.eINSTANCE.createEObject();
EMFAdapter emf = new EMFAdapter(obj);
assertThat(AdapterUtils.adapt(obj, EMFAdapter.class, null), is(emf));
}
@Test
public void testAdaptAdaptableDefaultDefault() {
String foo = "foo";
assertThat(AdapterUtils.adapt(new AdaptableWrapper(foo), Integer.class, 42), is(42));
}
@Test
public void testAdaptAdaptableDefaultNull() {
String foo = "foo";
assertThat(AdapterUtils.adapt(new AdaptableWrapper(foo), Integer.class, null), nullValue());
}
//
// Test framework
//
static <T> Matcher<Optional<T>> isPresent(Class<T> type) {
return new BaseMatcher<Optional<T>>() {
public void describeTo(Description description) {
description.appendText("optional value is present");
}
public boolean matches(Object item) {
return (item instanceof Optional<?>) && ((Optional<?>)item).isPresent();
}
};
}
static <T> Matcher<Optional<T>> isNull(Class<T> type) {
return not(isPresent(type));
}
public static class AdaptableWrapper implements IAdaptable {
private final Class<?> type;
private final Object instance;
public <T> AdaptableWrapper(T instance, Class<? super T> type) {
this.type = type;
this.instance = instance;
}
public AdaptableWrapper(Object instance) {
this.type = instance.getClass();
this.instance = instance;
}
public Object getAdapter(@SuppressWarnings("rawtypes") Class adapter) {
return (adapter == type) ? instance : null;
}
}
public static class EMFAdapter extends AdapterImpl {
public EMFAdapter(Notifier obj) {
obj.eAdapters().add(this);
}
@Override
public boolean isAdapterForType(Object type) {
return type == EMFAdapter.class;
}
}
}
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