String[] result = SearchRequestParams.simplifyArray(input);
        assertEquals(1, result.length);
        assertEquals("single", result[0]);
    }

    public void test_simplifyArray_withEmpty() {
        String[] input = {};
        String[] result = SearchRequestParams.simplifyArray(input);
        assertEquals(0, result.length);
    }

    // Test for getParamValueArray static method