for (int i = 0; i < 16; i++) {
            fileId3[i] = (byte) i;
        }

        // When & Then for each file ID
        testFileIdWriting(fileId1);
        testFileIdWriting(fileId2);
        testFileIdWriting(fileId3);
    }

    private void testFileIdWriting(byte[] fileId) {
        Configuration config = mock(Configuration.class);
        when(config.getNotifyBufferSize()).thenReturn(8192);