assertFalse(queryCommand.isSearchField(""));
    }

    /**
     * Test isSearchField() with null field.
     */
    @Test
    public void test_isSearchField_withNull() {
        assertFalse(queryCommand.isSearchField(null));
    }

    /**
     * Test isSearchField() with empty search field set.
     */
    @Test
    public void test_isSearchField_withEmptySet() {