}

    // ============================================================
    // Tests for concatKinds edge cases
    // ============================================================

    @Test
    public void test_concatKinds_bothEmpty() {
        SuggestItem.Kind[] result = SuggestItem.concatKinds(new SuggestItem.Kind[0], new SuggestItem.Kind[0]);

        assertEquals(0, result.length);
    }

    }

    @Test
    public void testConcatKinds() {
        // Test static concatKinds method
        SuggestItem.Kind[] kinds1 = { SuggestItem.Kind.QUERY };
        SuggestItem.Kind[] kinds2 = { SuggestItem.Kind.DOCUMENT, SuggestItem.Kind.QUERY };

        SuggestItem.Kind[] result = SuggestItem.concatKinds(kinds1, kinds2);

        assertNotNull(result);

     * @param kinds The initial kind array.
     * @param newKinds The new kind array to add.
     * @return The concatenated kind array.
     */
    protected static Kind[] concatKinds(final Kind[] kinds, final Kind... newKinds) {
        if (kinds == null) {
            return newKinds;
        }
        if (newKinds == null) {
            return kinds;
        }