public static ByteBuf copyFloat(float value) {
        ByteBuf buf = buffer(4);
        buf.writeFloat(value);
        return buf;
    }
@Test
    public void testWrapFloat() {
        ByteBuf buffer = copyFloat(1, 4);
        assertEquals(8, buffer.capacity());
        assertEquals(1, buffer.readFloat(), 0.01);
        assertEquals(4, buffer.readFloat(), 0.01);
        assertFalse(buffer.isReadable());
        buffer.release();

        buffer = copyFloat(null);
        assertEquals(0, buffer.capacity());
        buffer.release();

        buffer = copyFloat(new float[] {});
        assertEquals(0, buffer.capacity());
        buffer.release();
    }