public void TestAutoShrink()
{
IoBuffer buf = ByteBufferAllocator.Instance.Allocate(8);
buf.AutoShrink = true;
// Make sure the buffer doesn't shrink too much (less than the initial
// capacity.)
buf.Sweep((byte)1);
buf.Fill(7);
buf.Compact();
Assert.AreEqual(8, buf.Capacity);
Assert.AreEqual(1, buf.Position);
Assert.AreEqual(8, buf.Limit);
buf.Clear();
Assert.AreEqual(1, buf.Get());
// Expand the buffer.
buf.Capacity = 32;
buf.Clear();
Assert.AreEqual(32, buf.Capacity);
// Make sure the buffer shrinks when only 1/4 is being used.
buf.Sweep((byte)1);
buf.Fill(24);
buf.Compact();
Assert.AreEqual(16, buf.Capacity);
Assert.AreEqual(8, buf.Position);
Assert.AreEqual(16, buf.Limit);
buf.Clear();
for (int i = 0; i < 8; i++)
{
Assert.AreEqual(1, buf.Get());
}
// Expand the buffer.
buf.Capacity = 32;
buf.Clear();
Assert.AreEqual(32, buf.Capacity);
// Make sure the buffer shrinks when only 1/8 is being used.
buf.Sweep((byte)1);
buf.Fill(28);
buf.Compact();
Assert.AreEqual(8, buf.Capacity);
Assert.AreEqual(4, buf.Position);
Assert.AreEqual(8, buf.Limit);
buf.Clear();
for (int i = 0; i < 4; i++)
{
Assert.AreEqual(1, buf.Get());
}
// Expand the buffer.
buf.Capacity = 32;
buf.Clear();
Assert.AreEqual(32, buf.Capacity);
// Make sure the buffer shrinks when 0 byte is being used.
buf.Fill(32);
buf.Compact();
Assert.AreEqual(8, buf.Capacity);
Assert.AreEqual(0, buf.Position);
Assert.AreEqual(8, buf.Limit);
// Expand the buffer.
buf.Capacity = 32;
buf.Clear();
Assert.AreEqual(32, buf.Capacity);
// Make sure the buffer doesn't shrink when more than 1/4 is being used.
buf.Sweep((byte)1);
buf.Fill(23);
buf.Compact();
Assert.AreEqual(32, buf.Capacity);
Assert.AreEqual(9, buf.Position);
Assert.AreEqual(32, buf.Limit);
buf.Clear();
for (int i = 0; i < 9; i++)
{
Assert.AreEqual(1, buf.Get());
}
}
/// <inheritdoc/>
public override IoBuffer Compact()
{
_buf.Compact();
return(this);
}