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/*******************************************************************************
* Copyright (c) 2009 Matthew Hall and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Matthew Hall - initial API and implementation (bug 173735)
* Matthew Hall - bug 262407
*******************************************************************************/
package org.eclipse.core.tests.databinding.observable.value;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import java.util.ArrayList;
import java.util.Collection;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.list.WritableList;
import org.eclipse.core.databinding.observable.value.DuplexingObservableValue;
import org.eclipse.jface.tests.databinding.AbstractDefaultRealmTestCase;
import org.junit.Before;
import org.junit.Test;
/**
* @since 1.0
*
*/
public class DuplexingObservableValueTest extends AbstractDefaultRealmTestCase {
private IObservableList<String> list;
private DuplexingObservableValue<String> observable;
@Before
@Override
public void setUp() throws Exception {
super.setUp();
list = new WritableList<>(new ArrayList<>(), String.class);
}
@Test
public void testValueType_InheritFromTargetList() throws Exception {
observable = new DuplexingObservableValue<String>(list) {
@Override
protected String coalesceElements(Collection<String> elements) {
return null;
}
};
assertEquals(
"value type should be the element type of the target list",
String.class, observable.getValueType());
}
@Test
public void testValueType_ProvidedInConstructor() throws Exception {
observable = new DuplexingObservableValue<String>(list, Object.class) {
@Override
protected String coalesceElements(Collection<String> elements) {
return null;
}
};
assertEquals("value type should be the type passed to constructor",
Object.class, observable.getValueType());
}
@Test
public void test_getValue() throws Exception {
observable = DuplexingObservableValue.withDefaults(list, null,
"<Multiple Values>");
assertNull(observable.getValue());
list.add("42");
assertEquals("Value should be \"42\"", "42", observable.getValue());
list.add("42");
assertEquals("Value should be \"42\"", "42", observable.getValue());
list.add("watermelon");
assertEquals("<Multiple Values>", observable.getValue());
list.remove(2);
assertEquals("Value should be \"42\"", "42", observable.getValue());
list.clear();
assertNull(observable.getValue());
}
}
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