/* 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 tests.api.java.util;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.Vector;
/**
* java.util.LinkedHashSet
*/
public class LinkedHashSetTest extends junit.framework.TestCase {
LinkedHashSet hs;
Object[] objArray;
/**
* java.util.LinkedHashSet#LinkedHashSet()
*/
public void test_Constructor() {
// Test for method java.util.LinkedHashSet()
LinkedHashSet hs2 = new LinkedHashSet();
assertEquals("Created incorrect LinkedHashSet", 0, hs2.size());
}
/**
* java.util.LinkedHashSet#LinkedHashSet(int)
*/
public void test_ConstructorI() {
// Test for method java.util.LinkedHashSet(int)
LinkedHashSet hs2 = new LinkedHashSet(5);
assertEquals("Created incorrect LinkedHashSet", 0, hs2.size());
try {
new LinkedHashSet(-1);
fail("IllegalArgumentException expected");
} catch (IllegalArgumentException e) {
//expected
}
}
/**
* java.util.LinkedHashSet#LinkedHashSet(int, float)
*/
public void test_ConstructorIF() {
// Test for method java.util.LinkedHashSet(int, float)
LinkedHashSet hs2 = new LinkedHashSet(5, (float) 0.5);
assertEquals("Created incorrect LinkedHashSet", 0, hs2.size());
try {
new LinkedHashSet(-1, 0.5f);
fail("IllegalArgumentException expected");
} catch (IllegalArgumentException e) {
//expected
}
try {
new LinkedHashSet(1, -0.5f);
fail("IllegalArgumentException expected");
} catch (IllegalArgumentException e) {
//expected
}
try {
new LinkedHashSet(1, 0f);
fail("IllegalArgumentException expected");
} catch (IllegalArgumentException e) {
//expected
}
}
/**
* java.util.LinkedHashSet#LinkedHashSet(java.util.Collection)
*/
public void test_ConstructorLjava_util_Collection() {
// Test for method java.util.LinkedHashSet(java.util.Collection)
LinkedHashSet hs2 = new LinkedHashSet(Arrays.asList(objArray));
for (int counter = 0; counter < objArray.length; counter++)
assertTrue("LinkedHashSet does not contain correct elements", hs
.contains(objArray[counter]));
assertTrue("LinkedHashSet created from collection incorrect size", hs2
.size() == objArray.length);
try {
new LinkedHashSet(null);
fail("NullPointerException expected");
} catch (NullPointerException e) {
//expected
}
}
/**
* java.util.LinkedHashSet#add(java.lang.Object)
*/
public void test_addLjava_lang_Object() {
// Test for method boolean java.util.LinkedHashSet.add(java.lang.Object)
int size = hs.size();
hs.add(new Integer(8));
assertTrue("Added element already contained by set", hs.size() == size);
hs.add(new Integer(-9));
assertTrue("Failed to increment set size after add",
hs.size() == size + 1);
assertTrue("Failed to add element to set", hs.contains(new Integer(-9)));
}
/**
* java.util.LinkedHashSet#clear()
*/
public void test_clear() {
// Test for method void java.util.LinkedHashSet.clear()
Set orgSet = (Set) hs.clone();
hs.clear();
Iterator i = orgSet.iterator();
assertEquals("Returned non-zero size after clear", 0, hs.size());
while (i.hasNext())
assertTrue("Failed to clear set", !hs.contains(i.next()));
}
/**
* java.util.LinkedHashSet#clone()
*/
public void test_clone() {
// Test for method java.lang.Object java.util.LinkedHashSet.clone()
LinkedHashSet hs2 = (LinkedHashSet) hs.clone();
assertTrue("clone returned an equivalent LinkedHashSet", hs != hs2);
assertTrue("clone did not return an equal LinkedHashSet", hs
.equals(hs2));
}
/**
* java.util.LinkedHashSet#contains(java.lang.Object)
*/
public void test_containsLjava_lang_Object() {
// Test for method boolean
// java.util.LinkedHashSet.contains(java.lang.Object)
assertTrue("Returned false for valid object", hs.contains(objArray[90]));
assertTrue("Returned true for invalid Object", !hs
.contains(new Object()));
LinkedHashSet s = new LinkedHashSet();
s.add(null);
assertTrue("Cannot handle null", s.contains(null));
}
/**
* java.util.LinkedHashSet#isEmpty()
*/
public void test_isEmpty() {
// Test for method boolean java.util.LinkedHashSet.isEmpty()
assertTrue("Empty set returned false", new LinkedHashSet().isEmpty());
assertTrue("Non-empty set returned true", !hs.isEmpty());
}
/**
* java.util.LinkedHashSet#iterator()
*/
public void test_iterator() {
// Test for method java.util.Iterator java.util.LinkedHashSet.iterator()
Iterator i = hs.iterator();
int x = 0;
int j;
for (j = 0; i.hasNext(); j++) {
Object oo = i.next();
if (oo != null) {
Integer ii = (Integer) oo;
assertTrue("Incorrect element found", ii.intValue() == j);
} else {
assertTrue("Cannot find null", hs.contains(oo));
}
++x;
}
assertTrue("Returned iteration of incorrect size", hs.size() == x);
LinkedHashSet s = new LinkedHashSet();
s.add(null);
assertNull("Cannot handle null", s.iterator().next());
}
/**
* java.util.LinkedHashSet#remove(java.lang.Object)
*/
public void test_removeLjava_lang_Object() {
// Test for method boolean
// java.util.LinkedHashSet.remove(java.lang.Object)
int size = hs.size();
hs.remove(new Integer(98));
assertTrue("Failed to remove element", !hs.contains(new Integer(98)));
assertTrue("Failed to decrement set size", hs.size() == size - 1);
LinkedHashSet s = new LinkedHashSet();
s.add(null);
assertTrue("Cannot handle null", s.remove(null));
}
/**
* java.util.LinkedHashSet#size()
*/
public void test_size() {
// Test for method int java.util.LinkedHashSet.size()
assertTrue("Returned incorrect size", hs.size() == (objArray.length + 1));
hs.clear();
assertEquals("Cleared set returned non-zero size", 0, hs.size());
}
class Mock_LinkedHashSet extends LinkedHashSet {
@Override
public boolean retainAll(Collection c) {
throw new UnsupportedOperationException();
}
}
public void test_retainAllLjava_util_Collection() {
LinkedHashSet<Integer> lhs = new LinkedHashSet<Integer>();
Vector v = new Vector<Float>();
v.add(new Float(3.14));
lhs.add(new Integer(1));
assertEquals(1, lhs.size());
lhs.retainAll(v);
assertEquals(0, lhs.size());
v = new Vector<Integer>();
v.add(new Integer(1));
v.add(new Integer(2));
v.add(new Integer(3));
v.add(new Integer(4));
v.add(new Integer(5));
v.add(new Integer(6));
lhs.add(new Integer(1));
lhs.add(new Integer(6));
lhs.add(new Integer(7));
lhs.add(new Integer(8));
lhs.add(new Integer(9));
lhs.add(new Integer(10));
lhs.add(new Integer(11));
lhs.add(new Integer(12));
lhs.add(new Integer(13));
assertEquals(9, lhs.size());
lhs.retainAll(v);
assertEquals(2, lhs.size());
try {
lhs.retainAll(null);
fail("NullPointerException expected");
} catch (NullPointerException e) {
//expected
}
lhs = new Mock_LinkedHashSet();
try {
lhs.retainAll(v);
fail("UnsupportedOperationException expected");
} catch (UnsupportedOperationException e) {
//expected
}
}
public void test_toArray() {
LinkedHashSet<Integer> lhs = new LinkedHashSet<Integer>();
lhs.add(new Integer(1));
lhs.add(new Integer(6));
lhs.add(new Integer(7));
lhs.add(new Integer(8));
lhs.add(new Integer(9));
lhs.add(new Integer(10));
lhs.add(new Integer(11));
lhs.add(new Integer(12));
lhs.add(new Integer(13));
Object[] o = lhs.toArray();
for (int i = 0; i < o.length; i++) {
assertTrue(lhs.contains(o[i]));
}
assertEquals(lhs.size(), o.length);
}
public void test_toArray$Ljava_lang_Object() {
LinkedHashSet<Integer> lhs = new LinkedHashSet<Integer>();
lhs.add(new Integer(1));
lhs.add(new Integer(6));
lhs.add(new Integer(7));
lhs.add(new Integer(8));
lhs.add(new Integer(9));
lhs.add(new Integer(10));
lhs.add(new Integer(11));
lhs.add(new Integer(12));
lhs.add(new Integer(13));
Object[] o1 = new Object[lhs.size()];
Object[] o2 = new Double[lhs.size()];
lhs.toArray(o1);
for (int i = 0; i < o1.length; i++) {
assertTrue(lhs.contains(o1[i]));
}
try {
lhs.toArray(null);
fail("NullPointerException expected");
} catch (NullPointerException e) {
//expected
}
try {
lhs.toArray(o2);
fail("ArrayStoreException expected");
} catch (ArrayStoreException e) {
//expected
}
}
/**
* Sets up the fixture, for example, open a network connection. This method
* is called before a test is executed.
*/
protected void setUp() {
objArray = new Object[1000];
for (int i = 0; i < objArray.length; i++)
objArray[i] = new Integer(i);
hs = new LinkedHashSet();
for (int i = 0; i < objArray.length; i++)
hs.add(objArray[i]);
hs.add(null);
}
/**
* Tears down the fixture, for example, close a network connection. This
* method is called after a test is executed.
*/
protected void tearDown() {
objArray = null;
hs = null;
}
}