public int Allocate()
{
if (IndexesRemaining == 0)
{
Expand();
}
return(IndexPool.AllocateInstance());
}
public void should_allocate_and_remove_next_available_index()
{
var indexPool = new IndexPool(10, 10);
var index = indexPool.AllocateInstance();
Assert.InRange(index, 0, 10);
Assert.DoesNotContain(index, indexPool.AvailableIndexes);
}
public void should_expand_and_allocate_and_remove_next_available_index_when_empty()
{
var defaultExpansionAmount = 30;
var originalSize = 10;
var expectedSize = defaultExpansionAmount + originalSize;
var indexPool = new IndexPool(defaultExpansionAmount, originalSize);
indexPool.Clear();
var index = indexPool.AllocateInstance();
var expectedIdEntries = Enumerable.Range(0, expectedSize).ToList();
Assert.InRange(index, 0, expectedSize);
Assert.DoesNotContain(index, indexPool.AvailableIndexes);
Assert.All(indexPool.AvailableIndexes, x => expectedIdEntries.Contains(x));
}
public void should_continually_expand_correctly_when_allocating_over_count()
{
var expectedAllocations = 200;
var defaultExpansionAmount = 5;
var originalSize = 10;
var expectedIndexEntries = Enumerable.Range(0, expectedAllocations).ToArray();
var actualIndexEntries = new List <int>();
var indexPool = new IndexPool(defaultExpansionAmount, originalSize);
for (var i = 0; i < expectedAllocations; i++)
{
var index = indexPool.AllocateInstance();
actualIndexEntries.Add(index);
}
Assert.Equal(0, indexPool.AvailableIndexes.Count);
Assert.Equal(expectedAllocations, actualIndexEntries.Count);
Assert.All(indexPool.AvailableIndexes, x => expectedIndexEntries.Contains(x));
}