} catch (IOException e) {
            fail("Expected NullPointerException, not IOException");
        }
    }

    @Test
    public void testMemoryCacheWithBinaryData() throws IOException {
        // Test with binary data containing all byte values
        byte[] data = new byte[256];
        for (int i = 0; i < 256; i++) {
            data[i] = (byte) i;
        }