// Test setId
        tag.setId("unique-id");
        assertTrue(tag.toString().contains("id=unique-id"));

        // Test setCss
        tag.setCss("my-class");
        assertTrue(tag.toString().contains("css=my-class"));

        // Test setAttr
        tag.setAttr("data-role", "button");
        assertTrue(tag.toString().contains("attrName=data-role"));

t}.vh-100{height:100vh!important}.m-0{margin:0!important}.mt-0,.my-0{margin-top:0!important}.mr-0,.mx-0{margin-right:0!important}.mb-0,.my-0{margin-bottom:0!important}.ml-0,.mx-0{margin-left:0!important}.m-1{margin:.25rem!important}.mt-1,.my-1{margin-top:.25rem!important}.mr-1,.mx-1{margin-right:.25rem!important}.mb-1,.my-1{margin-bottom:.25rem!important}.ml-1,.mx-1{margin-left:.25rem!important}.m-2{margin:.5rem!important}.mt-2,.my-2{margin-top:.5rem!important}.mr-2,.mx-2{margin-right:.5rem!impo...

    }

    @Test
    public void test_componentNameWithSpecialCharacters() {
        // Test component name with special characters
        String componentName = "my-component_v2.0@service";
        ContainerNotAvailableException exception = new ContainerNotAvailableException(componentName, new RuntimeException());

        final ChatMessage msg = createAssistantWithSources("A".repeat(1000), "My Doc");
        final String result = chatClient.testBuildAssistantHistoryContent(msg, "source_titles", 500, 500);
        assertTrue(result.contains("... [truncated]"));
        assertTrue(result.contains("[Referenced documents: My Doc]"));
    }

    @Test
    public void test_sourceTitles_budgetEnforcesMaxChars() {

!important;\n}\n\n.mx-auto {\n  margin-right: auto !important;\n  margin-left: auto !important;\n}\n\n.my-0 {\n  margin-top: 0 !important;\n  margin-bottom: 0 !important;\n}\n\n.my-1 {\n  margin-top: 0.25rem !important;\n  margin-bottom: 0.25rem !important;\n}\n\n.my-2 {\n  margin-top: 0.5rem !important;\n  margin-bottom: 0.5rem !important;\n}\n\n.my-3 {\n  margin-top: 1rem !important;\n  margin-bottom: 1rem !important;\n}\n\n.my-4 {\n  margin-top: 1.5rem !important;\n  margin-bottom: 1.5rem !important;\n}\n\n.my-5...

#### Document Migration

**Step 1: Export from Source**

Export documents from your existing Elasticsearch/OpenSearch cluster:

```bash
# Using elasticdump
elasticdump \
  --input=http://old-es-server:9200/my-index \
  --output=documents.json \
  --type=data
```

**Step 2: Convert to Fess Format**

Transform documents to include Fess required fields. Example transformation script:

```python
import json

!important;\n}\n\n.m-0 {\n  margin: 0 !important;\n}\n\n.mt-0,\n.my-0 {\n  margin-top: 0 !important;\n}\n\n.mr-0,\n.mx-0 {\n  margin-right: 0 !important;\n}\n\n.mb-0,\n.my-0 {\n  margin-bottom: 0 !important;\n}\n\n.ml-0,\n.mx-0 {\n  margin-left: 0 !important;\n}\n\n.m-1 {\n  margin: 0.25rem !important;\n}\n\n.mt-1,\n.my-1 {\n  margin-top: 0.25rem !important;\n}\n\n.mr-1,\n.mx-1 {\n  margin-right: 0.25rem !important;\n}\n\n.mb-1,\n.my-1 {\n  margin-bottom: 0.25rem !important;\n}\n\n.ml-1,\n.mx-1 {\n...

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!important;\n}\n\n.m-0 {\n  margin: 0 !important;\n}\n\n.mt-0,\n.my-0 {\n  margin-top: 0 !important;\n}\n\n.mr-0,\n.mx-0 {\n  margin-right: 0 !important;\n}\n\n.mb-0,\n.my-0 {\n  margin-bottom: 0 !important;\n}\n\n.ml-0,\n.mx-0 {\n  margin-left: 0 !important;\n}\n\n.m-1 {\n  margin: 0.25rem !important;\n}\n\n.mt-1,\n.my-1 {\n  margin-top: 0.25rem !important;\n}\n\n.mr-1,\n.mx-1 {\n  margin-right: 0.25rem !important;\n}\n\n.mb-1,\n.my-1 {\n  margin-bottom: 0.25rem !important;\n}\n\n.ml-1,\n.mx-1 {\n...

        },
        "czech_keywords": {
          "type":       "keyword_marker",