test: adding more docstring code snippets to CI tests

[davidsbatista]

Related Issues

• fixes #issue-number

Proposed Changes:

How did you test it?

Notes for the reviewer

Checklist

• I have read the contributors guidelines and the code of conduct.
• I have updated the related issue with new insights and changes.
• I have added unit tests and updated the docstrings.
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test: and added ! in case the PR includes breaking changes.
• I have documented my code.
• I have added a release note file, following the contributors guidelines.
• I have run pre-commit hooks and fixed any issue.

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Project	Deployment	Actions	Updated (UTC)
haystack-docs	Ready	Preview, Comment	Apr 7, 2026 1:21pm

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Coverage Report for CI Build 24083523329

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Coverage: 92.831%

Details

• Patch coverage: No coverable lines changed in this PR.

Uncovered Changes

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Coverage Stats

Relevant Lines:	17158
Covered Lines:	15928
Line Coverage:	92.83%
Coverage Strength:	0.93 hits per line

---

💛 - Coveralls

[davidsbatista]

• TransformersZeroShotTextRouter — haystack/components/routers/zero_shot_text_router.py:26
• TransformersTextRouter — haystack/components/routers/transformers_text_router.py:25
• LLMDocumentContentExtractor — haystack/components/extractors/image/llm_document_content_extractor.py:80
• NamedEntityExtractor — haystack/components/extractors/named_entity_extractor.py:91
• LLMMessagesRouter — haystack/components/routers/llm_messages_router.py:23
• HuggingFaceLocalGenerator — haystack/components/generators/hugging_face_local.py:32
• AzureOpenAIGenerator — haystack/components/generators/azure.py:36
• HuggingFaceAPIGenerator — haystack/components/generators/hugging_face_api.py:53,67,84
• AzureOpenAIResponsesChatGenerator — haystack/components/generators/chat/azure_responses.py:37
• TransformersSimilarityRanker — haystack/components/rankers/transformers_similarity.py:38
• DocumentToImageContent — haystack/components/converters/image/document_to_image.py:37
• FileToFileContent — haystack/components/converters/file_to_file_content.py:25
• LocalWhisperTranscriber — haystack/components/audio/whisper_local.py:43
• SentenceTransformersSparseDocumentEmbedder — haystack/components/embedders/sentence_transformers_sparse_document_embedder.py:28
• HuggingFaceAPIDocumentEmbedder — haystack/components/embedders/hugging_face_api_document_embedder.py:39,58,77
• AzureOCRDocumentConverter — haystack/components/converters/azure.py:41
• AzureOpenAIChatGenerator — haystack/components/generators/chat/azure.py:45
• SentenceTransformersSparseTextEmbedder — haystack/components/embedders/sentence_transformers_sparse_text_embedder.py:25
• SentenceTransformersDocumentEmbedder — haystack/components/embedders/sentence_transformers_document_embedder.py:28
• HuggingFaceAPIChatGenerator — haystack/components/generators/chat/hugging_face_api.py:266,290,317,335
• SentenceTransformersDiversityRanker — haystack/components/rankers/sentence_transformers_diversity.py:102
• HuggingFaceAPITextEmbedder — haystack/components/embedders/hugging_face_api_text_embedder.py:32,47,61
• OpenAITextEmbedder — haystack/components/embedders/openai_text_embedder.py:24
• SentenceTransformersDocumentImageEmbedder — haystack/components/embedders/image/sentence_transformers_doc_image_embedder.py:35
• OpenAIDocumentEmbedder — haystack/components/embedders/openai_document_embedder.py:27
• AzureOpenAIDocumentEmbedder — haystack/components/embedders/azure_document_embedder.py:24
• SentenceTransformersTextEmbedder — haystack/components/embedders/sentence_transformers_text_embedder.py:24
• HuggingFaceTEIRanker — haystack/components/rankers/hugging_face_tei.py:39
• AzureOpenAITextEmbedder — haystack/components/embedders/azure_text_embedder.py:22
• request_with_retry — haystack/utils/requests_utils.py:22

[anakin87]

I'd exclude some of them

• HuggingFaceLocalGenerator and HuggingFaceLocalChatGenerato: heavy and slow generative models on CPU
• TikaDocumentConverter: requires Tika docker container running

A few others I'm unsure about

• NamedEntityExtractor: might require spacy that is not available in the test environment (it's on e2e only)
• LocalWhisperTranscriber: might be slow on CPU but it's worth trying