/*
* 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.
*/
/**
* @author Evgueni V. Brevnov, Roman S. Bushmanov
*/
package java.lang;
import java.lang.reflect.Constructor;
import junit.framework.TestCase;
/**
* tested class: java.lang.Class
* tested method: getDeclaredConstructors
*/
public class ClassTestGetDeclaredConstructors extends TestCase {
/**
* The primitive types don't declare constructors.
*/
public void test1() {
Constructor[] cs = Integer.TYPE.getDeclaredConstructors();
assertNotNull("unexpected null", cs);
assertEquals("array length:", 0, cs.length);
}
/**
* The arrays don't declare constructors.
*/
public void test2() {
Constructor[] cs = new int[0].getClass().getDeclaredConstructors();
assertNotNull("unexpected null", cs);
assertEquals("array length:", 0, cs.length);
}
/**
* Only default constructor which takes no parameters must be returned.
* Constructors of the super class must not be returned.
*/
public void test3() {
Constructor[] cs = ClassTestGetDeclaredConstructors.class
.getDeclaredConstructors();
assertNotNull("unexpected null", cs);
assertEquals("array length:", 1, cs.length);
assertEquals("array length:", 0, cs[0].getParameterTypes().length);
}
/**
* Only default constructor which takes no parameters must be returned.
* Constructors of the super class must not be returned.
*/
public void test4() {
Constructor[] cs = Inner.class
.getDeclaredConstructors();
assertNotNull("unexpected null", cs);
assertEquals("Constructors length:", 1, cs.length);
assertEquals("Parameters length:", 0, cs[0].getParameterTypes().length);
}
/**
* The getDeclaredConstructors() method must return protected, package
* private and private constructors.
*/
public void test5() {
Constructor[] cs = Inner2.class.getDeclaredConstructors();
assertEquals("Constructors length:", 2, cs.length);
Class[] args = cs[0].getParameterTypes();
if (args.length == 0) {
args = cs[1].getParameterTypes();
assertEquals("Assert 0: args length:", 1, args.length);
assertSame("objects differ:", String.class, args[0]);
} else {
assertEquals("Assert 1: args length:", 1, args.length);
assertSame("objects differ:", String.class, args[0]);
args = cs[1].getParameterTypes();
assertEquals("Assert 2: args length:", 0, args.length);
}
}
/**
* The interfaces can not define constructors.
*/
public void test6() {
Constructor[] cs = Inner3.class.getDeclaredConstructors();
assertNotNull("unexpected null", cs);
assertEquals("array length:", 0, cs.length);
}
static class Inner extends Throwable {
private static final long serialVersionUID = 0L;
}
public static class Inner2 {
public Inner2(String s) {
}
private Inner2() {
}
}
public static interface Inner3 {
}
}
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