public void TestRehash()
{
// This map should rehash on adding the ninth element.
HashMap <MyKey, Object> hm = new HashMap <MyKey, Object>(10, 0.5f);
// Ordered set of keys.
MyKey[] keyOrder = new MyKey[9];
for (int i = 0; i < keyOrder.Length; i++)
{
keyOrder[i] = new MyKey();
}
// Store eight elements
for (int i = 0; i < 8; i++)
{
hm.Put(keyOrder[i], i);
}
// Check expected ordering (inverse of adding order)
MyKey[] returnedKeys = hm.KeySet().ToArray();
for (int i = 0; i < 8; i++)
{
Assert.AreSame(keyOrder[i], returnedKeys[7 - i]);
}
// The Next Put causes a rehash
hm.Put(keyOrder[8], 8);
// Check expected new ordering (adding order)
returnedKeys = hm.KeySet().ToArray();
for (int i = 0; i < 9; i++)
{
Assert.AreSame(keyOrder[i], returnedKeys[i]);
}
}
public void TestKeySet()
{
Set <Object> s = hm.KeySet();
Assert.IsTrue(s.Size() == hm.Size(), "Returned set of incorrect Size()");
for (int i = 0; i < objArray.Length; i++)
{
Assert.IsTrue(s.Contains(objArray[i].ToString()), "Returned set does not contain all keys");
}
HashMap <Object, Object> m = new HashMap <Object, Object>();
m.Put(null, "test");
Assert.IsTrue(m.KeySet().Contains(null), "Assert.Failed with null key");
Assert.IsNull(m.KeySet().Iterator().Next(), "Assert.Failed with null key");
Map <Object, Object> map = new HashMap <Object, Object>(101);
map.Put(1, "1");
map.Put(102, "102");
map.Put(203, "203");
Iterator <Object> it = map.KeySet().Iterator();
Object remove1 = it.Next();
Assert.IsTrue(it.HasNext);
it.Remove();
Object remove2 = (Int32)it.Next();
it.Remove();
ArrayList <Object> list = new ArrayList <Object>(Arrays.AsList(new Object[] { 1, 102, 203 }));
list.Remove(remove1);
list.Remove(remove2);
Assert.IsTrue(it.Next().Equals(list.Get(0)), "Wrong result");
Assert.AreEqual(1, map.Size(), "Wrong Size");
Assert.IsTrue(map.KeySet().Iterator().Next().Equals(list.Get(0)), "Wrong contents");
Map <Object, Object> map2 = new HashMap <Object, Object>(101);
map2.Put(1, "1");
map2.Put(4, "4");
Iterator <Object> it2 = map2.KeySet().Iterator();
Object remove3 = it2.Next();
Object Next;
if ((int)remove3 == 1)
{
Next = 4;
}
else
{
Next = 1;
}
Assert.IsTrue(it2.HasNext);
it2.Remove();
Assert.IsTrue(it2.Next().Equals(Next), "Wrong result 2");
Assert.AreEqual(1, map2.Size(), "Wrong Size 2");
Assert.IsTrue(map2.KeySet().Iterator().Next().Equals(Next), "Wrong contents 2");
}
public void TestKeySet()
{
AbstractMap <Object, Object> map1 = new HashMap <Object, Object>(0);
Assert.AreSame(map1.KeySet(), map1.KeySet(), "HashMap(0)");
AbstractMap <Object, Object> map2 = new HashMap <Object, Object>(10);
Assert.AreSame(map2.KeySet(), map2.KeySet(), "HashMap(10)");
Map <Object, Object> map3 = CollectionUtils.EMPTY_MAP;
Assert.AreSame(map3.KeySet(), map3.KeySet(), "EMPTY_MAP");
AbstractMap <Object, Object> map5 = new LinkedHashMap <Object, Object>(122);
Assert.AreSame(map5.KeySet(), map5.KeySet(), "LinkedHashMap");
}
public void TestNullsOnViews()
{
Map <String, String> nullHostile = new HashMap <String, String>();
nullHostile.Put("a", "apple");
TestNullsOnView(nullHostile.EntrySet());
nullHostile.Put("a", "apple");
TestNullsOnView(nullHostile.KeySet());
nullHostile.Put("a", "apple");
TestNullsOnView(nullHostile.Values());
}
public void TestClone()
{
HashMap <Object, Object> hm2 = (HashMap <Object, Object>)hm.Clone();
Assert.IsTrue(hm2 != hm, "Clone answered equivalent HashMap");
for (int counter = 0; counter < hmSize; counter++)
{
Assert.IsTrue(hm.Get(objArray2[counter]) == hm2.Get(objArray2[counter]), "Clone answered unequal HashMap");
}
HashMap <Object, Object> map = new HashMap <Object, Object>();
map.Put("key", "value");
// get the KeySet() and Values() on the original Map
Set <Object> keys = map.KeySet();
Collection <Object> values = map.Values();
Assert.AreEqual("value", values.Iterator().Next(), "Values() does not work");
Assert.AreEqual("key", keys.Iterator().Next(), "KeySet() does not work");
AbstractMap <Object, Object> map2 = (AbstractMap <Object, Object>)map.Clone();
map2.Put("key", "value2");
Collection <Object> values2 = map2.Values();
Assert.IsTrue(values2 != values, "Values() is identical");
// Values() and KeySet() on the Cloned() map should be different
Assert.AreEqual("value2", values2.Iterator().Next(), "Values() was not Cloned");
map2.Clear();
map2.Put("key2", "value3");
Set <Object> key2 = map2.KeySet();
Assert.IsTrue(key2 != keys, "KeySet() is identical");
Assert.AreEqual("key2", key2.Iterator().Next(), "KeySet() was not Cloned");
HashMap <Object, Object> hashmap = new HashMap <Object, Object>();
MockClonable mock = new MockClonable(1);
hashmap.Put(1, mock);
Assert.AreEqual(1, ((MockClonable)hashmap.Get(1)).i);
HashMap <Object, Object> hm3 = (HashMap <Object, Object>)hashmap.Clone();
Assert.AreEqual(1, ((MockClonable)hm3.Get(1)).i);
mock.i = 0;
Assert.AreEqual(0, ((MockClonable)hashmap.Get(1)).i);
Assert.AreEqual(0, ((MockClonable)hm3.Get(1)).i);
}
public override Iterator <E> Iterator()
{
return(backingMap.KeySet().Iterator());
}
public void TestPut2()
{
hm.Put("KEY", "VALUE");
Assert.AreEqual("VALUE", hm.Get("KEY"), "Assert.Failed to install key/value pair");
HashMap <Object, Object> m = new HashMap <Object, Object>();
m.Put(0, "short");
m.Put(null, "test");
m.Put(0, "int");
Assert.AreEqual("int", m.Get(0), "Assert.Failed adding to bucket containing null");
Assert.AreEqual("int", m.Get(0), "Assert.Failed adding to bucket containing null2");
// Check my actual key instance is returned
HashMap <Object, String> map = new HashMap <Object, String>();
for (int i = -32767; i < 32768; i++)
{
map.Put(i, "foobar");
}
Object myKey = 0;
// Put a new value at the old key position
map.Put(myKey, "myValue");
Assert.IsTrue(map.ContainsKey(myKey));
Assert.AreEqual("myValue", map.Get(myKey));
bool found = false;
for (Iterator <Object> itr = map.KeySet().Iterator(); itr.HasNext;)
{
Object key = itr.Next();
if (found = key == myKey)
{
break;
}
}
Assert.IsFalse(found, "Should not find new key instance in hashmap");
// Add a new key instance and check it is returned
Assert.IsNotNull(map.Remove(myKey));
map.Put(myKey, "myValue");
Assert.IsTrue(map.ContainsKey(myKey));
Assert.AreEqual(map.Get(myKey), "myValue");
for (Iterator <Object> itr = map.KeySet().Iterator(); itr.HasNext;)
{
Object key = itr.Next();
if (found = key == myKey)
{
break;
}
}
Assert.IsTrue(found, "Did not find new key instance in hashmap");
// Ensure keys with identical hashcode are stored separately
HashMap <Object, Object> objmap = new HashMap <Object, Object>();
for (int i = 0; i < 32768; i++)
{
objmap.Put(i, "foobar");
}
// Put non-equal object with same hashcode
MyKey aKey = new MyKey();
Assert.IsNull(objmap.Put(aKey, "value"));
Assert.IsNull(objmap.Remove(new MyKey()));
Assert.AreEqual(objmap.Get(0), "foobar");
Assert.AreEqual(objmap.Get(aKey), "value");
}
