assertEquals("User is not found: testuser", e.getCause().getMessage());
        }
    }

    public void test_multipleInstances() {
        // Test that multiple instances are independent
        FessUserNotFoundException exception1 = new FessUserNotFoundException("user1");
        FessUserNotFoundException exception2 = new FessUserNotFoundException("user2");

        ApiResult result = errorResponse.result();

        assertNotNull(result);
        // Cannot directly access protected fields, just verify the result is not null
    }

    // Test multiple configurations
    public void test_multipleConfigurations() {
        // Test with exception included = true
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {

        assertTrue(result.contains(expectedHashCode));
    }

    // Test toString() format consistency
    public void test_toString_formatConsistency() {
        // Create multiple instances and verify consistent format
        FessUserTimeZoneProcessProvider provider1 = new FessUserTimeZoneProcessProvider();
        FessUserTimeZoneProcessProvider provider2 = new FessUserTimeZoneProcessProvider();

        }
    }

    public void test_process_multipleThreads() throws Exception {
        // Test process method with multiple threads
        ThumbnailGenerator.Options options = new ThumbnailGenerator.Options();
        options.numOfThreads = 4;
        options.cleanup = false;

        // Setup mock components with counter

        assertNotNull(queryBuilder1);
        assertTrue(queryBuilder1 instanceof WildcardQueryBuilder);
        // Query was processed successfully

        // Test with multiple wildcards
        QueryContext queryContext2 = new QueryContext("*te*st*", false);
        WildcardQuery wildcardQuery2 = new WildcardQuery(new Term("content", "*te*st*"));

        assertNull(existingItem.getNewInput());
        assertEquals("existingword", existingItem.toLineString());
    }

    public void test_multipleUpdates() {
        // Test multiple updates to newInput
        StopwordsItem item = new StopwordsItem(1, "original");

        item.setNewInput("first");
        assertEquals("first", item.toLineString());
        assertTrue(item.isUpdated());

    }

    // ensures that the number of invocations looks sane
    void assertInvariants(int expectedBytes) {
      // we should have seen as many bytes as the next multiple of chunk after expectedBytes - 1
      assertEquals(out.toByteArray().length, ceilToMultiple(expectedBytes, chunkSize));
      assertEquals(expectedBytes / chunkSize, processCalled);

        when(treeHandle.send(any(), any(), (RequestParam[]) any())).thenAnswer(invocation -> {
            return invocation.getArgument(1);
        });

        // When: Create iterator and close multiple times
        NetServerEnumIterator iterator = new NetServerEnumIterator(parent, treeHandle, "*", 0, null);

        iterator.close();
        iterator.close(); // Second close should be safe

        assertNotNull(originHeaders);
        assertTrue(originHeaders.contains(testOrigin));
    }

    // Test process method with multiple origins
    public void test_processWithMultipleOrigins() {
        String[] testOrigins = { "https://example.com", "https://test.example.com", "http://localhost:8080" };

        for (String origin : testOrigins) {

  }

  /**
   * Returns a hash code for {@code t}.
   *
   * <p>The {@code hash} has the following properties:
   *
   * <ul>
   *   <li>It is <i>consistent</i>: for any reference {@code x}, multiple invocations of {@code
   *       hash(x}} consistently return the same value provided {@code x} remains unchanged
   *       according to the definition of the equivalence. The hash need not remain consistent from