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/*******************************************************************************
* Copyright (c) 2007, 2008 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 208858)
******************************************************************************/
package org.eclipse.core.tests.databinding.observable.list;
import static org.junit.Assert.assertEquals;
import org.eclipse.core.databinding.observable.list.ListDiffVisitor;
import org.junit.Before;
import org.junit.Test;
/**
* Tests for ListDiffVisitor class
*
* @since 1.1
*/
public class ListDiffVisitorTest {
ListDiffVisitorStub visitor;
@Before
public void setUp() throws Exception {
visitor = new ListDiffVisitorStub();
}
@Test
public void testHandleMove_DelegatesByDefault() {
visitor.handleMove(0, 1, "element");
assertEquals(
"Default ListDiffVisitor.handleMove must delegate to handleRemove and handleAdd",
"remove(0,element), add(1,element)", visitor.log);
}
@Test
public void testHandleReplace_DelegatesByDefault() {
visitor.handleReplace(2, "oldElement", "newElement");
assertEquals(
"Default ListDiffVisitor.handleReplace must delegate to handleRemove and handleAdd",
"remove(2,oldElement), add(2,newElement)", visitor.log);
}
static class ListDiffVisitorStub extends ListDiffVisitor<Object> {
String log = "";
private void log(String message) {
if (log.length() > 0)
log += ", ";
log += message;
}
@Override
public void handleAdd(int index, Object element) {
log("add(" + index + "," + element + ")");
}
@Override
public void handleRemove(int index, Object element) {
log("remove(" + index + "," + element + ")");
}
}
}
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