// Test value was set
        assertEquals(1L, purgeThumbnailJob.getExpiry());
    }

    // Test execute with successful purge (no files deleted)
    public void test_execute_noFilesDeleted() {
        thumbnailManager.setPurgeCallCount(0);

        String result = purgeThumbnailJob.execute();

        assertEquals("Deleted 0 thumbnail files.", result);