assertNotNull(region);

        // Release should not throw exception
        assertDoesNotThrow(() -> bufferManager.releaseReceiveRegion(region));
    }

    @Test
    public void testAllocateBuffer() {
        ByteBuffer buffer = bufferManager.allocateBuffer(2048);
        assertNotNull(buffer, "Buffer should not be null");
        assertTrue(buffer.capacity() >= 2048, "Buffer should be at least requested size");