/*
* Copyright 2014 Daniel Bechler
*
* 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 de.danielbechler.diff.issues.issue15;
import de.danielbechler.diff.ObjectDiffer;
import de.danielbechler.diff.ObjectDifferBuilder;
import de.danielbechler.diff.helper.NodeAssertions;
import de.danielbechler.diff.mock.ObjectWithNestedObject;
import de.danielbechler.diff.node.DiffNode;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import static de.danielbechler.diff.circular.CircularReferenceMatchingMode.EQUALITY_OPERATOR;
/**
* @author Daniel Bechler
*/
public class CircularReferenceDetectionBasedOnIdentityIT
{
private ObjectDiffer objectDiffer;
@BeforeMethod
public void setUp() throws Exception
{
final ObjectDifferBuilder objectDifferBuilder = ObjectDifferBuilder.startBuilding();
objectDifferBuilder.circularReferenceHandling().matchCircularReferencesUsing(EQUALITY_OPERATOR);
objectDiffer = objectDifferBuilder.build();
}
@Test
public void detectsCircularReference_whenEncounteringSameObjectTwice() throws Exception
{
final ObjectWithNestedObject object = new ObjectWithNestedObject("foo");
object.setObject(object);
final DiffNode node = objectDiffer.compare(object, null);
NodeAssertions.assertThat(node).child("object").isCircular();
}
@Test
public void detectsNoCircularReference_whenEncounteringDifferentButEqualObjectsTwice() throws Exception
{
final ObjectWithNestedObject object = new ObjectWithNestedObject("foo", new ObjectWithNestedObject("foo"));
final DiffNode node = objectDiffer.compare(object, null);
NodeAssertions.assertThat(node).child("object").hasState(DiffNode.State.ADDED);
}
}