public void TestRemove()
{
int Size = hm.Size();
Object y = 9;
Object x = hm.Remove(y.ToString());
Assert.IsTrue(x.Equals(9), "Remove returned incorrect value");
Assert.IsNull(hm.Get(9), "Assert.Failed to Remove given key");
Assert.IsTrue(hm.Size() == (Size - 1), "Assert.Failed to decrement Size");
Assert.IsNull(hm.Remove("LCLCLC"), "Remove of non-existent key returned non-null");
HashMap <Object, Object> m = new HashMap <Object, Object>();
m.Put(null, "test");
Assert.IsNull(m.Remove(0), "Assert.Failed with same hash as null");
Assert.AreEqual("test", m.Remove(null), "Assert.Failed with null key");
HashMap <Object, Object> map = new HashMap <Object, Object>();
for (int i = 0; i < 32768; i++)
{
map.Put(i, "const");
}
Object[] values = new Object[32768];
for (int i = 0; i < 32768; i++)
{
values[i] = new Object();
map.Put(i, values[i]);
}
for (int i = 32767; i >= 0; i--)
{
Assert.AreEqual(values[i], map.Remove(i), "Assert.Failed to Remove same value");
}
// Ensure keys with identical hashcode are Removed properly
map = new HashMap <Object, Object>();
for (int i = -32767; i < 32768; i++)
{
map.Put(i, "foobar");
}
// Remove non equal object with same hashcode
Assert.IsNull(map.Remove(new MyKey()));
Assert.AreEqual("foobar", map.Get(0));
map.Remove(0);
Assert.IsNull(map.Get(0));
}
public void TestRemoveObject()
{
Object key = new Object();
Object val = new Object();
AbstractMap <Object, Object> map1 = new HashMap <Object, Object>(0);
map1.Put("key", val);
Assert.AreSame(map1.Remove("key"), val, "HashMap(0)");
AbstractMap <Object, Object> map5 = new LinkedHashMap <Object, Object>(122);
map5.Put(key, val);
Assert.AreSame(map5.Remove(key), val, "LinkedHashMap");
AbstractMap <Object, Object> aSpecialMap = new MyMap();
aSpecialMap.Put(specialKey, specialValue);
Object valueOut = aSpecialMap.Remove(specialKey);
Assert.AreSame(valueOut, specialValue, "MyMap");
}
public override bool Remove(E obj)
{
return(backingMap.Remove(obj) != null);
}
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");
}
