const BufSize = 1000
	b := NewWriterSize(new(bytes.Buffer), BufSize)
	// Does it recognize itself?
	b1 := NewWriterSize(b, BufSize)
	if b1 != b {
		t.Error("NewWriterSize did not detect underlying Writer")
	}
	// Does it wrap if existing buffer is too small?
	b2 := NewWriterSize(b, 2*BufSize)
	if b2 == b {
		t.Error("NewWriterSize did not enlarge buffer")
	}
}