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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.commons.lang3.builder;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.lang3.AbstractLangTest;
import org.junit.jupiter.api.Test;
/**
* Unit tests {@link DiffResult}.
*/
public class DiffResultTest extends AbstractLangTest {
private static final SimpleClass SIMPLE_FALSE = new SimpleClass(false);
private static final SimpleClass SIMPLE_TRUE = new SimpleClass(true);
private static final ToStringStyle SHORT_STYLE = ToStringStyle.SHORT_PREFIX_STYLE;
private static class SimpleClass implements Diffable<SimpleClass> {
private final boolean booleanField;
SimpleClass(final boolean booleanField) {
this.booleanField = booleanField;
}
static String getFieldName() {
return "booleanField";
}
@Override
public DiffResult<SimpleClass> diff(final SimpleClass obj) {
return new DiffBuilder<>(this, obj, ToStringStyle.SHORT_PREFIX_STYLE)
.append(getFieldName(), booleanField, obj.booleanField)
.build();
}
}
private static class EmptyClass {
// empty
}
@Test
public void testListIsNonModifiable() {
final SimpleClass lhs = new SimpleClass(true);
final SimpleClass rhs = new SimpleClass(false);
final List<Diff<?>> diffs = lhs.diff(rhs).getDiffs();
final DiffResult<SimpleClass> list = new DiffResult<>(lhs, rhs, diffs, SHORT_STYLE);
assertEquals(diffs, list.getDiffs());
assertEquals(1, list.getNumberOfDiffs());
assertThrows(UnsupportedOperationException.class, () -> list.getDiffs().remove(0));
}
@Test
public void testIterator() {
final SimpleClass lhs = new SimpleClass(true);
final SimpleClass rhs = new SimpleClass(false);
final List<Diff<?>> diffs = lhs.diff(rhs).getDiffs();
final Iterator<Diff<?>> expectedIterator = diffs.iterator();
final DiffResult<SimpleClass> list = new DiffResult<>(lhs, rhs, diffs, SHORT_STYLE);
final Iterator<Diff<?>> iterator = list.iterator();
while (iterator.hasNext()) {
assertTrue(expectedIterator.hasNext());
assertEquals(expectedIterator.next(), iterator.next());
}
}
@Test
public void testToStringOutput() {
final DiffResult<EmptyClass> list = new DiffBuilder<>(new EmptyClass(), new EmptyClass(),
ToStringStyle.SHORT_PREFIX_STYLE).append("test", false, true)
.build();
assertEquals(
"DiffResultTest.EmptyClass[test=false] differs from DiffResultTest.EmptyClass[test=true]",
list.toString());
}
@Test
public void testToStringSpecifyStyleOutput() {
final DiffResult<SimpleClass> list = SIMPLE_FALSE.diff(SIMPLE_TRUE);
assertEquals(list.getToStringStyle(), SHORT_STYLE);
final String lhsString = new ToStringBuilder(SIMPLE_FALSE,
ToStringStyle.MULTI_LINE_STYLE).append(
SimpleClass.getFieldName(), SIMPLE_FALSE.booleanField).build();
final String rhsString = new ToStringBuilder(SIMPLE_TRUE,
ToStringStyle.MULTI_LINE_STYLE).append(
SimpleClass.getFieldName(), SIMPLE_TRUE.booleanField).build();
final String expectedOutput = String.format("%s differs from %s", lhsString,
rhsString);
assertEquals(expectedOutput,
list.toString(ToStringStyle.MULTI_LINE_STYLE));
}
@Test
public void testNullLhs() {
assertThrows(NullPointerException.class,
() -> new DiffResult<>(null, SIMPLE_FALSE, SIMPLE_TRUE.diff(SIMPLE_FALSE).getDiffs(), SHORT_STYLE));
}
@Test
public void testNullRhs() {
assertThrows(NullPointerException.class,
() -> new DiffResult<>(SIMPLE_TRUE, null, SIMPLE_TRUE.diff(SIMPLE_FALSE).getDiffs(), SHORT_STYLE));
}
@Test
public void testNullList() {
assertThrows(NullPointerException.class,
() -> new DiffResult<>(SIMPLE_TRUE, SIMPLE_FALSE, null, SHORT_STYLE));
}
@Test
public void testNullStyle() {
final DiffResult<SimpleClass> diffResult = new DiffResult<>(SIMPLE_TRUE, SIMPLE_FALSE, SIMPLE_TRUE
.diff(SIMPLE_FALSE).getDiffs(), null);
assertEquals(ToStringStyle.DEFAULT_STYLE, diffResult.getToStringStyle());
}
@Test
public void testNoDifferencesString() {
final DiffResult<SimpleClass> diffResult = new DiffBuilder<>(SIMPLE_TRUE, SIMPLE_TRUE,
SHORT_STYLE).build();
assertEquals(DiffResult.OBJECTS_SAME_STRING, diffResult.toString());
}
@Test
public void testLeftAndRightGetters() {
final SimpleClass left = new SimpleClass(true);
final SimpleClass right = new SimpleClass(false);
final List<Diff<?>> diffs = left.diff(right).getDiffs();
final DiffResult diffResult = new DiffResult(left, right, diffs, SHORT_STYLE);
assertEquals(left, diffResult.getLeft());
assertEquals(right, diffResult.getRight());
}
}
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