String expected = "[testParam, [value1, value2]]";
        assertEquals(expected, param.toString());
    }

    public void test_toString_withNullName() {
        // Test toString with null name
        String[] values = { "value1" };
        RequestParameter param = new RequestParameter(null, values);

        String expected = "[null, [value1]]";
        assertEquals(expected, param.toString());
    }

        docMap.put("key1", "value1");
        docMap.put("key2", "value2");
        docMap.put("key3", "value3");

        Collection<Object> values = docMap.values();
        assertEquals(3, values.size());
        assertTrue(values.contains("value1"));
        assertTrue(values.contains("value2"));
        assertTrue(values.contains("value3"));
    }

    public void test_multipleOperations() {
        // Add initial values
        dataStoreParams.put("key1", "value1");
        dataStoreParams.put("key2", 123);

        // Add more values using putAll
        Map<String, String> additionalParams = new HashMap<>();
        additionalParams.put("key3", "value3");
        additionalParams.put("key4", "value4");
        dataStoreParams.putAll(additionalParams);

        // Test getting multiple different properties
        String value1 = fessConfig.get("domain.title");
        String value2 = fessConfig.get("search_engine.type");

        assertEquals("Test Fess", value1);
        assertEquals("opensearch", value2);
        assertFalse(value1.equals(value2));
    }

    // Test empty string property value
    public void test_get_emptyStringValue() {

      Key key1 = new Key(1);
      String value1 = key1.toString();
      Key key2 = new Key(2);
      String value2 = key2.toString();
      assertSame(value1, cache.getUnchecked(key1));
      assertSame(value2, cache.getUnchecked(key2));
      assertEquals(ImmutableSet.of(key1, key2), cache.asMap().keySet());
      assertThat(cache.asMap().values()).containsExactly(value1, value2);
      assertEquals(

        value = "  key1  =  value1  \n  key2=value2\n";
        paramMap = ParameterUtil.parse(value);
        assertEquals(2, paramMap.size());
        assertEquals("value1", paramMap.get("key1"));
        assertEquals("value2", paramMap.get("key2"));

        // Test with empty lines and mixed whitespace
        value = "key1=value1\n\n\t\nkey2=value2\n \n";
        paramMap = ParameterUtil.parse(value);

                ClosingFuture.from(immediateFuture("value2")),
                ClosingFuture.from(immediateFuture("value3")),
                ClosingFuture.from(immediateFuture("value4")),
                ClosingFuture.from(immediateFuture("value5")))
            .call(
                new ClosingFunction5<

        System.setProperty("custom.prop.one", "value1");
        System.setProperty("custom.prop.two", "value2");
        System.setProperty("other.property", "value3");

        // Test with regex pattern
        execJob.testAddFessCustomSystemProperties(cmdList, "custom\\.prop\\..*");

        assertEquals(2, cmdList.size());
        assertTrue(cmdList.contains("-Dcustom.prop.one=value1"));

        source.put("TestKey", "value1");
        source.put("AnotherTestKey", "value2");

        Map<String, Object> nested = new HashMap<>();
        nested.put("NestedKey", "nestedValue");
        source.put("NestedMap", nested);

        Map<String, Object> result = searchLogHelper.toLowerHyphen(source);

        assertEquals("value1", result.get("test_key"));

            @Override
            public int getLtrWindowSize() {
                return 50;
            }
        });

        Map<String, Object> params = new HashMap<>();
        params.put("param1", "value1");

        RescorerBuilder<?> result = ltrQueryRescorer.evaluate(params);
        assertNull(result);
    }

    public void test_evaluate_withNullModelName() {
        // Test when model name is null