@Test
    public void test_getExecuteType() {
        assertEquals(Constants.EXECUTE_TYPE_THUMBNAIL, thumbnailJob.getExecuteType());
    }

    // Test numOfThreads setter
    @Test
    public void test_numOfThreads() {
        assertEquals(1, thumbnailJob.numOfThreads);

        GenerateThumbnailJob result = thumbnailJob.numOfThreads(4);

        assertSame(thumbnailJob, result);