nameServiceClient.getNbtByName("NONEXISTENT-FAST-FAIL");
        }, "Should throw UnknownHostException for non-existent NetBIOS name");

        // Verify the exception message indicates name resolution failure
        assertTrue(exception.getMessage().contains("NONEXISTENT") || exception.getMessage().contains("unknown")

        dataStoreParams.put("key3", null);
        assertNull(dataStoreParams.get("key3"));
    }

    // Test get for non-existent key
    public void test_getNonExistentKey() {
        assertNull(dataStoreParams.get("nonexistent"));
    }

    // Test getAsString with String value
    public void test_getAsStringWithStringValue() {
        dataStoreParams.put("stringKey", "stringValue");

    }

    public void test_execute_withInvalidScriptType() {
        // Try to execute with non-existent script type
        try {
            scriptExecutor.execute("nonexistent", "some script");
            fail("Expected ScriptEngineException");
        } catch (ScriptEngineException e) {
            assertTrue(e.getMessage().contains("nonexistent"));
        }
    }

    public void test_execute_withNullScriptType() {

            Path path = ResourceUtil.getConfOrClassesPath("nonexistent.conf");
            fail("Should throw ResourceNotFoundRuntimeException for non-existent file");
        } catch (org.codelibs.core.exception.ResourceNotFoundRuntimeException e) {
            // Expected behavior - method throws exception for non-existent files
            assertTrue(e.getMessage().contains("nonexistent.conf"));
        }

        }
    }

    // Test getScriptEngine with non-existent name
    public void test_getScriptEngine_nonExistentName() {
        try {
            scriptEngineFactory.getScriptEngine("nonexistent");
            fail("Should throw ScriptEngineException for non-existent engine");
        } catch (ScriptEngineException e) {
            assertEquals("nonexistent is not found.", e.getMessage());
        }
    }

        }
    }

    // Test initialization with non-existent directory
    public void test_init_nonExistentDirectory() {
        ThumbnailManager manager = new ThumbnailManager() {
            @Override
            public void init() {
                baseDir = new File(tempDir, "nonexistent/dir");
                if (baseDir.mkdirs()) {

    public void test_get_nullProperty() {
        // Test getting non-existent property
        try {
            fessConfig.get("non.existent.property");
            fail("Should throw exception for non-existent property");
        } catch (ConfigPropertyNotFoundException e) {
            // Expected exception
            assertTrue(e.getMessage().contains("non.existent.property"));
        }
    }

        // Test operations on empty service
        assertEquals(0, mockService.getRegistrationCount());
        assertFalse(mockService.hasRegistration("non-existent"));
        assertFalse(mockService.unregisterWitness("non-existent"));
        assertFalse(mockService.processHeartbeat("non-existent", 1));

        // Test registration with null/empty values
        String regId1 = mockService.registerWitness(null, "192.168.1.100", 1);

			expectedRespStatus: http.StatusBadRequest,
		},
		// Test case - 8.
		// non-existent bucket is used.
		// writing BucketPolicy should fail.
		// should result in 404 StatusNotFound
		{
			bucketName:         "non-existent-bucket",
			bucketPolicyReader: bytes.NewReader(fmt.Appendf(nil, bucketPolicyTemplate, "non-existent-bucket", "non-existent-bucket")),

        assertFalse(processHelper.isProcessRunning("nonexistent"));
    }

    public void test_getRunningSessionIdSet_empty() {
        Set<String> sessionIds = processHelper.getRunningSessionIdSet();
        assertNotNull(sessionIds);
        assertTrue(sessionIds.isEmpty());
    }

    public void test_destroyProcess_nonExistent() {
        int result = processHelper.destroyProcess("nonexistent");
        assertEquals(-1, result);
    }