public virtual void TestSizeChange()
{
var hadoop = GetBytesForString("hadoop");
BytesWritable buf = new BytesWritable(hadoop);
int size = buf.Length;
int orig_capacity = buf.Capacity;
buf.Size = (size * 2);
int newCapacity = buf.Capacity;
Array.Copy(buf.Bytes, 0, buf.Bytes, size, size);
newCapacity.ShouldBeGreaterThanOrEqualTo(size * 2);
(size * 2).ShouldEqual(buf.Length);
Assert.True(newCapacity != orig_capacity);
buf.Size = (size * 4);
Assert.True(newCapacity != buf.Capacity);
for (int i = 0; i < size * 2; ++i)
{
Assert.Equal(hadoop[i % size], buf.Bytes[i]);
}
// ensure that copyBytes is exactly the right length
Assert.Equal(size * 4, buf.CopyBytes().Length);
// shrink the buffer
buf.Capacity = (1);
// make sure the size has been cut down too
Assert.Equal(1, buf.Length);
// but that the data is still there
Assert.Equal(hadoop[0], buf.Bytes[0]);
}