/*
* 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.harmony.luni.tests.java.util;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
public class HashSetTest extends junit.framework.TestCase {
HashSet hs;
static Object[] objArray;
{
objArray = new Object[1000];
for (int i = 0; i < objArray.length; i++)
objArray[i] = new Integer(i);
}
/**
* @tests java.util.HashSet#HashSet()
*/
public void test_Constructor() {
// Test for method java.util.HashSet()
HashSet hs2 = new HashSet();
assertEquals("Created incorrect HashSet", 0, hs2.size());
}
/**
* @tests java.util.HashSet#HashSet(int)
*/
public void test_ConstructorI() {
// Test for method java.util.HashSet(int)
HashSet hs2 = new HashSet(5);
assertEquals("Created incorrect HashSet", 0, hs2.size());
try {
new HashSet(-1);
} catch (IllegalArgumentException e) {
return;
}
fail(
"Failed to throw IllegalArgumentException for capacity < 0");
}
/**
* @tests java.util.HashSet#HashSet(int, float)
*/
public void test_ConstructorIF() {
// Test for method java.util.HashSet(int, float)
HashSet hs2 = new HashSet(5, (float) 0.5);
assertEquals("Created incorrect HashSet", 0, hs2.size());
try {
new HashSet(0, 0);
} catch (IllegalArgumentException e) {
return;
}
fail(
"Failed to throw IllegalArgumentException for initial load factor <= 0");
}
/**
* @tests java.util.HashSet#HashSet(java.util.Collection)
*/
public void test_ConstructorLjava_util_Collection() {
// Test for method java.util.HashSet(java.util.Collection)
HashSet hs2 = new HashSet(Arrays.asList(objArray));
for (int counter = 0; counter < objArray.length; counter++)
assertTrue("HashSet does not contain correct elements", hs
.contains(objArray[counter]));
assertTrue("HashSet created from collection incorrect size",
hs2.size() == objArray.length);
}
/**
* @tests java.util.HashSet#add(java.lang.Object)
*/
public void test_addLjava_lang_Object() {
// Test for method boolean java.util.HashSet.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)));
}
/**
* @tests java.util.HashSet#clear()
*/
public void test_clear() {
// Test for method void java.util.HashSet.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()));
}
/**
* @tests java.util.HashSet#clone()
*/
public void test_clone() {
// Test for method java.lang.Object java.util.HashSet.clone()
HashSet hs2 = (HashSet) hs.clone();
assertTrue("clone returned an equivalent HashSet", hs != hs2);
assertTrue("clone did not return an equal HashSet", hs.equals(hs2));
}
/**
* @tests java.util.HashSet#contains(java.lang.Object)
*/
public void test_containsLjava_lang_Object() {
// Test for method boolean java.util.HashSet.contains(java.lang.Object)
assertTrue("Returned false for valid object", hs.contains(objArray[90]));
assertTrue("Returned true for invalid Object", !hs
.contains(new Object()));
HashSet s = new HashSet();
s.add(null);
assertTrue("Cannot handle null", s.contains(null));
}
/**
* @tests java.util.HashSet#isEmpty()
*/
public void test_isEmpty() {
// Test for method boolean java.util.HashSet.isEmpty()
assertTrue("Empty set returned false", new HashSet().isEmpty());
assertTrue("Non-empty set returned true", !hs.isEmpty());
}
/**
* @tests java.util.HashSet#iterator()
*/
public void test_iterator() {
// Test for method java.util.Iterator java.util.HashSet.iterator()
Iterator i = hs.iterator();
int x = 0;
while (i.hasNext()) {
assertTrue("Failed to iterate over all elements", hs.contains(i
.next()));
++x;
}
assertTrue("Returned iteration of incorrect size", hs.size() == x);
HashSet s = new HashSet();
s.add(null);
assertNull("Cannot handle null", s.iterator().next());
}
/**
* @tests java.util.HashSet#remove(java.lang.Object)
*/
public void test_removeLjava_lang_Object() {
// Test for method boolean java.util.HashSet.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);
HashSet s = new HashSet();
s.add(null);
assertTrue("Cannot handle null", s.remove(null));
}
/**
* @tests java.util.HashSet#size()
*/
public void test_size() {
// Test for method int java.util.HashSet.size()
assertTrue("Returned incorrect size", hs.size() == (objArray.length + 1));
hs.clear();
assertEquals("Cleared set returned non-zero size", 0, hs.size());
}
/**
* @tests java.util.AbstractCollection#toString()
*/
public void test_toString() {
HashSet s = new HashSet();
s.add(s);
String result = s.toString();
assertTrue("should contain self ref", result.indexOf("(this") > -1);
}
/**
* Sets up the fixture, for example, open a network connection. This method
* is called before a test is executed.
*/
protected void setUp() {
hs = new HashSet();
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() {
}
}