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/*
* Copyright 2014 Google, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 8063147
* @summary Tests for Class.getFields().
* @run testng Sanity
*/
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.testng.annotations.Test;
import static org.testng.Assert.*;
public class Sanity {
public interface EmptyInterface {}
class EmptyClass {}
interface BI1 {
public int i = 1;
int j = 2;
}
interface BI2 {
int k = 1;
}
public interface DI extends BI1, BI2, EmptyInterface {
int m = 5;
}
interface DDI extends DI {
int n = 6;
}
public class D extends EmptyClass {
public int publicDField;
protected int protectedDField;
private int privateDField;
}
class DD extends D {
public int publicDDField;
protected int protectedDDField;
private int privateDDField;
}
public class Universe extends DD implements DDI {
public int publicUniverseField;
protected int protectedUniverseField;
private int privateUniverseField;
}
void assertContainsNoFields(Class<?> clazz) {
assertEquals(clazz.getFields().length, 0);
}
@Test
public void primitiveTypesHaveNoFields() throws Exception {
assertContainsNoFields(byte.class);
assertContainsNoFields(char.class);
assertContainsNoFields(short.class);
assertContainsNoFields(int.class);
assertContainsNoFields(long.class);
assertContainsNoFields(boolean.class);
assertContainsNoFields(void.class);
assertContainsNoFields(double.class);
assertContainsNoFields(float.class);
}
@Test
public void arrayTypesHaveNoFields() throws Exception {
assertContainsNoFields(byte[].class);
assertContainsNoFields(Object[].class);
assertContainsNoFields(java.util.Map[].class);
assertContainsNoFields(java.util.HashMap[].class);
}
@Test
public void emptyInterfacesHaveNoFields() throws Exception {
assertContainsNoFields(EmptyInterface.class);
}
@Test
public void emptyClassesHaveNoFields() throws Exception {
assertContainsNoFields(EmptyClass.class);
class EmptyLocalClass {}
assertContainsNoFields(EmptyLocalClass.class);
}
void assertContainsFields(Class<?> clazz, int count) {
assertEquals(clazz.getFields().length, count);
}
@Test
public void checkFieldCounts() throws Exception {
assertContainsFields(BI1.class, 2);
assertContainsFields(BI2.class, 1);
assertContainsFields(DI.class, 4);
assertContainsFields(DDI.class, 5);
assertContainsFields(D.class, 1);
assertContainsFields(DD.class, 2);
assertContainsFields(Universe.class, 8);
}
void assertContainsFields(Class<?> derived, Class<?> base) {
List<Field> derivedFields = Arrays.asList(derived.getFields());
List<Field> baseFields = Arrays.asList(base.getFields());
assertTrue(derivedFields.containsAll(baseFields));
}
List<Class<?>> directSupers(Class<?> clazz) {
List<Class<?>> directSupers = new ArrayList<>();
directSupers.addAll(Arrays.asList(clazz.getInterfaces()));
if (clazz.getSuperclass() != null) {
directSupers.add(clazz.getSuperclass());
}
return directSupers;
}
void assertContainsSuperFields(Class<?> clazz) {
for (Class<?> directSuper : directSupers(clazz)) {
assertContainsFields(clazz, directSuper);
}
}
List<Class<?>> testClasses() {
List<Class<?>> testClasses = new ArrayList<>();
testClasses.add(Sanity.class);
testClasses.addAll(Arrays.asList(Sanity.class.getDeclaredClasses()));
assertEquals(testClasses.size(), 10);
return testClasses;
}
@Test
public void fieldsAreInheritedFromSupers() throws Exception {
for (Class clazz : testClasses()) {
assertContainsSuperFields(clazz);
}
}
@Test
public void getFieldIsConsistentWithGetFields() throws Exception {
for (Class clazz : testClasses()) {
for (Field field : clazz.getFields()) {
assertEquals(field, clazz.getField(field.getName()));
}
}
}
}
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