Test: Add tests for chunk API endpoints (#8616)

### What problem does this PR solve?

- Add comprehensive test suite for chunk operations including:
  - Test files for create, list, retrieve, update, and delete chunks
  - Authorization tests
  - Batch operations tests
- Update test configurations and common utilities
- Validate `important_kwd` and `question_kwd` fields are lists in
chunk_app.py
- Reorganize imports and clean up duplicate code

### Type of change

- [x] Add test cases

api/apps/chunk_app.py

 #
 import datetime
 import json
+import re
 
+import xxhash
 from flask import request
-from flask_login import login_required, current_user
+from flask_login import current_user, login_required
 
-from rag.app.qa import rmPrefix, beAdoc
-from rag.app.tag import label_question
-from rag.nlp import search, rag_tokenizer
-from rag.prompts import keyword_extraction, cross_languages
-from rag.settings import PAGERANK_FLD
-from rag.utils import rmSpace
+from api import settings
 from api.db import LLMType, ParserType
+from api.db.services.document_service import DocumentService
 from api.db.services.knowledgebase_service import KnowledgebaseService
 from api.db.services.llm_service import LLMBundle
 from api.db.services.user_service import UserTenantService
-from api.utils.api_utils import server_error_response, get_data_error_result, validate_request
-from api.db.services.document_service import DocumentService
-from api import settings
-from api.utils.api_utils import get_json_result
-import xxhash
-import re
-
+from api.utils.api_utils import get_data_error_result, get_json_result, server_error_response, validate_request
+from rag.app.qa import beAdoc, rmPrefix
+from rag.app.tag import label_question
+from rag.nlp import rag_tokenizer, search
+from rag.prompts import cross_languages, keyword_extraction
+from rag.settings import PAGERANK_FLD
+from rag.utils import rmSpace
 
 
 @manager.route('/list', methods=['POST'])  # noqa: F821
     d["content_ltks"] = rag_tokenizer.tokenize(req["content_with_weight"])
     d["content_sm_ltks"] = rag_tokenizer.fine_grained_tokenize(d["content_ltks"])
     if "important_kwd" in req:
+        if not isinstance(req["important_kwd"], list):
+            return get_data_error_result(message="`important_kwd` should be a list")
         d["important_kwd"] = req["important_kwd"]
         d["important_tks"] = rag_tokenizer.tokenize(" ".join(req["important_kwd"]))
     if "question_kwd" in req:
+        if not isinstance(req["question_kwd"], list):
+            return get_data_error_result(message="`question_kwd` should be a list")
         d["question_kwd"] = req["question_kwd"]
         d["question_tks"] = rag_tokenizer.tokenize("\n".join(req["question_kwd"]))
     if "tag_kwd" in req:
     d["create_timestamp_flt"] = datetime.datetime.now().timestamp()
     if "tag_feas" in req:
         d["tag_feas"] = req["tag_feas"]
+    if "tag_feas" in req:
+        d["tag_feas"] = req["tag_feas"]
 
     try:
         e, doc = DocumentService.get_by_id(req["doc_id"])

test/testcases/test_http_api/conftest.py

 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
-
 from time import sleep
 
 import pytest

test/testcases/test_web_api/common.py

 
 KB_APP_URL = f"/{VERSION}/kb"
 DOCUMENT_APP_URL = f"/{VERSION}/document"
-# FILE_API_URL = "/api/v1/datasets/{dataset_id}/documents"
-# FILE_CHUNK_API_URL = "/api/v1/datasets/{dataset_id}/chunks"
-# CHUNK_API_URL = "/api/v1/datasets/{dataset_id}/documents/{document_id}/chunks"
+CHUNK_API_URL = f"/{VERSION}/chunk"
 # CHAT_ASSISTANT_API_URL = "/api/v1/chats"
 # SESSION_WITH_CHAT_ASSISTANT_API_URL = "/api/v1/chats/{chat_id}/sessions"
 # SESSION_WITH_AGENT_API_URL = "/api/v1/agents/{agent_id}/sessions"
     for document in res["data"]:
         document_ids.append(document["id"])
     return document_ids
+
+
+# CHUNK APP
+def add_chunk(auth, payload=None, *, headers=HEADERS, data=None):
+    res = requests.post(url=f"{HOST_ADDRESS}{CHUNK_API_URL}/create", headers=headers, auth=auth, json=payload, data=data)
+    return res.json()
+
+
+def list_chunks(auth, payload=None, *, headers=HEADERS):
+    res = requests.post(url=f"{HOST_ADDRESS}{CHUNK_API_URL}/list", headers=headers, auth=auth, json=payload)
+    return res.json()
+
+
+def get_chunk(auth, params=None, *, headers=HEADERS):
+    res = requests.get(url=f"{HOST_ADDRESS}{CHUNK_API_URL}/get", headers=headers, auth=auth, params=params)
+    return res.json()
+
+
+def update_chunk(auth, payload=None, *, headers=HEADERS):
+    res = requests.post(url=f"{HOST_ADDRESS}{CHUNK_API_URL}/set", headers=headers, auth=auth, json=payload)
+    return res.json()
+
+
+def delete_chunks(auth, payload=None, *, headers=HEADERS):
+    res = requests.post(url=f"{HOST_ADDRESS}{CHUNK_API_URL}/rm", headers=headers, auth=auth, json=payload)
+    return res.json()
+
+
+def retrieval_chunks(auth, payload=None, *, headers=HEADERS):
+    res = requests.post(url=f"{HOST_ADDRESS}{CHUNK_API_URL}/retrieval_test", headers=headers, auth=auth, json=payload)
+    return res.json()
+
+
+def batch_add_chunks(auth, doc_id, num):
+    chunk_ids = []
+    for i in range(num):
+        res = add_chunk(auth, {"doc_id": doc_id, "content_with_weight": f"chunk test {i}"})
+        chunk_ids.append(res["data"]["chunk_id"])
+    return chunk_ids

test/testcases/test_web_api/conftest.py

 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
+from time import sleep
+
 import pytest
 from common import (
+    batch_add_chunks,
     batch_create_datasets,
+    bulk_upload_documents,
+    delete_chunks,
+    list_chunks,
+    list_documents,
     list_kbs,
+    parse_documents,
     rm_kb,
 )
-
-# from configs import HOST_ADDRESS, VERSION
 from libs.auth import RAGFlowWebApiAuth
 from pytest import FixtureRequest
-
-# from ragflow_sdk import RAGFlow
+from utils import wait_for
 from utils.file_utils import (
     create_docx_file,
     create_eml_file,
 )
 
 
+@wait_for(30, 1, "Document parsing timeout")
+def condition(_auth, _kb_id):
+    res = list_documents(_auth, {"kb_id": _kb_id})
+    for doc in res["data"]["docs"]:
+        if doc["run"] != "3":
+            return False
+    return True
+
+
 @pytest.fixture
 def generate_test_files(request: FixtureRequest, tmp_path):
     file_creators = {
     return RAGFlowWebApiAuth(auth)
 
 
-# @pytest.fixture(scope="session")
-# def client(token: str) -> RAGFlow:
-#     return RAGFlow(api_key=token, base_url=HOST_ADDRESS, version=VERSION)
-
-
 @pytest.fixture(scope="function")
 def clear_datasets(request: FixtureRequest, WebApiAuth: RAGFlowWebApiAuth):
     def cleanup():
 
     request.addfinalizer(cleanup)
     return batch_create_datasets(WebApiAuth, 1)[0]
+
+
+@pytest.fixture(scope="class")
+def add_document(request, WebApiAuth, add_dataset, ragflow_tmp_dir):
+    #     def cleanup():
+    #         res = list_documents(WebApiAuth, {"kb_id": dataset_id})
+    #         for doc in res["data"]["docs"]:
+    #             delete_document(WebApiAuth, {"doc_id": doc["id"]})
+
+    #     request.addfinalizer(cleanup)
+
+    dataset_id = add_dataset
+    return dataset_id, bulk_upload_documents(WebApiAuth, dataset_id, 1, ragflow_tmp_dir)[0]
+
+
+@pytest.fixture(scope="class")
+def add_chunks(request, WebApiAuth, add_document):
+    def cleanup():
+        res = list_chunks(WebApiAuth, {"doc_id": document_id})
+        if res["code"] == 0:
+            chunk_ids = [chunk["chunk_id"] for chunk in res["data"]["chunks"]]
+            delete_chunks(WebApiAuth, {"doc_id": document_id, "chunk_ids": chunk_ids})
+
+    request.addfinalizer(cleanup)
+
+    kb_id, document_id = add_document
+    parse_documents(WebApiAuth, {"doc_ids": [document_id], "run": "1"})
+    condition(WebApiAuth, kb_id)
+    chunk_ids = batch_add_chunks(WebApiAuth, document_id, 4)
+    # issues/6487
+    sleep(1)
+    return kb_id, document_id, chunk_ids

test/testcases/test_web_api/test_chunk_app/conftest.py

+#
+#  Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+
+
+from time import sleep
+
+import pytest
+from common import batch_add_chunks, delete_chunks, list_chunks, list_documents, parse_documents
+from utils import wait_for
+
+
+@wait_for(30, 1, "Document parsing timeout")
+def condition(_auth, _kb_id):
+    res = list_documents(_auth, {"kb_id": _kb_id})
+    for doc in res["data"]["docs"]:
+        if doc["run"] != "3":
+            return False
+    return True
+
+
+@pytest.fixture(scope="function")
+def add_chunks_func(request, WebApiAuth, add_document):
+    def cleanup():
+        res = list_chunks(WebApiAuth, {"doc_id": document_id})
+        chunk_ids = [chunk["chunk_id"] for chunk in res["data"]["chunks"]]
+        delete_chunks(WebApiAuth, {"doc_id": document_id, "chunk_ids": chunk_ids})
+
+    request.addfinalizer(cleanup)
+
+    kb_id, document_id = add_document
+    parse_documents(WebApiAuth, {"doc_ids": [document_id], "run": "1"})
+    condition(WebApiAuth, kb_id)
+    chunk_ids = batch_add_chunks(WebApiAuth, document_id, 4)
+    # issues/6487
+    sleep(1)
+    return kb_id, document_id, chunk_ids

test/testcases/test_web_api/test_chunk_app/test_create_chunk.py

+#
+#  Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+from concurrent.futures import ThreadPoolExecutor, as_completed
+
+import pytest
+from common import add_chunk, delete_document, get_chunk, list_chunks
+from configs import INVALID_API_TOKEN
+from libs.auth import RAGFlowWebApiAuth
+
+
+def validate_chunk_details(auth, kb_id, doc_id, payload, res):
+    chunk_id = res["data"]["chunk_id"]
+    res = get_chunk(auth, {"chunk_id": chunk_id})
+    assert res["code"] == 0, res
+    chunk = res["data"]
+    assert chunk["doc_id"] == doc_id
+    assert chunk["kb_id"] == kb_id
+    assert chunk["content_with_weight"] == payload["content_with_weight"]
+    if "important_kwd" in payload:
+        assert chunk["important_kwd"] == payload["important_kwd"]
+    if "question_kwd" in payload:
+        expected = [str(q).strip() for q in payload.get("question_kwd", [])]
+        assert chunk["question_kwd"] == expected
+
+
+@pytest.mark.p1
+class TestAuthorization:
+    @pytest.mark.parametrize(
+        "invalid_auth, expected_code, expected_message",
+        [
+            (None, 401, "<Unauthorized '401: Unauthorized'>"),
+            (RAGFlowWebApiAuth(INVALID_API_TOKEN), 401, "<Unauthorized '401: Unauthorized'>"),
+        ],
+    )
+    def test_invalid_auth(self, invalid_auth, expected_code, expected_message):
+        res = add_chunk(invalid_auth)
+        assert res["code"] == expected_code, res
+        assert res["message"] == expected_message, res
+
+
+class TestAddChunk:
+    @pytest.mark.p1
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_message",
+        [
+            ({"content_with_weight": None}, 100, """TypeError("unsupported operand type(s) for +: 'NoneType' and 'str'")"""),
+            ({"content_with_weight": ""}, 0, ""),
+            pytest.param(
+                {"content_with_weight": 1},
+                100,
+                """TypeError("unsupported operand type(s) for +: 'int' and 'str'")""",
+                marks=pytest.mark.skip,
+            ),
+            ({"content_with_weight": "a"}, 0, ""),
+            ({"content_with_weight": " "}, 0, ""),
+            ({"content_with_weight": "\n!?。；！？\"'"}, 0, ""),
+        ],
+    )
+    def test_content(self, WebApiAuth, add_document, payload, expected_code, expected_message):
+        kb_id, doc_id = add_document
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        if res["code"] == 0:
+            chunks_count = res["data"]["doc"]["chunk_num"]
+        else:
+            chunks_count = 0
+        res = add_chunk(WebApiAuth, {**payload, "doc_id": doc_id})
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            validate_chunk_details(WebApiAuth, kb_id, doc_id, payload, res)
+            res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+            assert res["code"] == 0, res
+            assert res["data"]["doc"]["chunk_num"] == chunks_count + 1, res
+        else:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p2
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_message",
+        [
+            ({"content_with_weight": "chunk test", "important_kwd": ["a", "b", "c"]}, 0, ""),
+            ({"content_with_weight": "chunk test", "important_kwd": [""]}, 0, ""),
+            (
+                {"content_with_weight": "chunk test", "important_kwd": [1]},
+                100,
+                "TypeError('sequence item 0: expected str instance, int found')",
+            ),
+            ({"content_with_weight": "chunk test", "important_kwd": ["a", "a"]}, 0, ""),
+            ({"content_with_weight": "chunk test", "important_kwd": "abc"}, 102, "`important_kwd` is required to be a list"),
+            ({"content_with_weight": "chunk test", "important_kwd": 123}, 102, "`important_kwd` is required to be a list"),
+        ],
+    )
+    def test_important_keywords(self, WebApiAuth, add_document, payload, expected_code, expected_message):
+        kb_id, doc_id = add_document
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        if res["code"] == 0:
+            chunks_count = res["data"]["doc"]["chunk_num"]
+        else:
+            chunks_count = 0
+        res = add_chunk(WebApiAuth, {**payload, "doc_id": doc_id})
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            validate_chunk_details(WebApiAuth, kb_id, doc_id, payload, res)
+            res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+            assert res["code"] == 0, res
+            assert res["data"]["doc"]["chunk_num"] == chunks_count + 1, res
+        else:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p2
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_message",
+        [
+            ({"content_with_weight": "chunk test", "question_kwd": ["a", "b", "c"]}, 0, ""),
+            ({"content_with_weight": "chunk test", "question_kwd": [""]}, 0, ""),
+            ({"content_with_weight": "chunk test", "question_kwd": [1]}, 100, "TypeError('sequence item 0: expected str instance, int found')"),
+            ({"content_with_weight": "chunk test", "question_kwd": ["a", "a"]}, 0, ""),
+            ({"content_with_weight": "chunk test", "question_kwd": "abc"}, 102, "`question_kwd` is required to be a list"),
+            ({"content_with_weight": "chunk test", "question_kwd": 123}, 102, "`question_kwd` is required to be a list"),
+        ],
+    )
+    def test_questions(self, WebApiAuth, add_document, payload, expected_code, expected_message):
+        kb_id, doc_id = add_document
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        if res["code"] == 0:
+            chunks_count = res["data"]["doc"]["chunk_num"]
+        else:
+            chunks_count = 0
+        res = add_chunk(WebApiAuth, {**payload, "doc_id": doc_id})
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            validate_chunk_details(WebApiAuth, kb_id, doc_id, payload, res)
+            res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+            assert res["code"] == 0, res
+            assert res["data"]["doc"]["chunk_num"] == chunks_count + 1, res
+        else:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p3
+    @pytest.mark.parametrize(
+        "doc_id, expected_code, expected_message",
+        [
+            ("", 102, "Document not found!"),
+            ("invalid_document_id", 102, "Document not found!"),
+        ],
+    )
+    def test_invalid_document_id(self, WebApiAuth, add_document, doc_id, expected_code, expected_message):
+        _, _ = add_document
+        res = add_chunk(WebApiAuth, {"doc_id": doc_id, "content_with_weight": "chunk test"})
+        assert res["code"] == expected_code, res
+        assert res["message"] == expected_message, res
+
+    @pytest.mark.p3
+    def test_repeated_add_chunk(self, WebApiAuth, add_document):
+        payload = {"content_with_weight": "chunk test"}
+        kb_id, doc_id = add_document
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        if res["code"] != 0:
+            assert False, res
+        chunks_count = res["data"]["doc"]["chunk_num"]
+
+        res = add_chunk(WebApiAuth, {**payload, "doc_id": doc_id})
+        assert res["code"] == 0, res
+        validate_chunk_details(WebApiAuth, kb_id, doc_id, payload, res)
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        if res["code"] != 0:
+            assert False, res
+        assert res["data"]["doc"]["chunk_num"] == chunks_count + 1, res
+
+        res = add_chunk(WebApiAuth, {**payload, "doc_id": doc_id})
+        assert res["code"] == 0, res
+        validate_chunk_details(WebApiAuth, kb_id, doc_id, payload, res)
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        if res["code"] != 0:
+            assert False, res
+        assert res["data"]["doc"]["chunk_num"] == chunks_count + 2, res
+
+    @pytest.mark.p2
+    def test_add_chunk_to_deleted_document(self, WebApiAuth, add_document):
+        _, doc_id = add_document
+        delete_document(WebApiAuth, {"doc_id": doc_id})
+        res = add_chunk(WebApiAuth, {"doc_id": doc_id, "content_with_weight": "chunk test"})
+        assert res["code"] == 102, res
+        assert res["message"] == "Document not found!", res
+
+    @pytest.mark.skip(reason="issues/6411")
+    @pytest.mark.p3
+    def test_concurrent_add_chunk(self, WebApiAuth, add_document):
+        count = 50
+        _, doc_id = add_document
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        if res["code"] == 0:
+            chunks_count = res["data"]["doc"]["chunk_num"]
+        else:
+            chunks_count = 0
+
+        with ThreadPoolExecutor(max_workers=5) as executor:
+            futures = [
+                executor.submit(
+                    add_chunk,
+                    WebApiAuth,
+                    {"doc_id": doc_id, "content_with_weight": f"chunk test {i}"},
+                )
+                for i in range(count)
+            ]
+        responses = list(as_completed(futures))
+        assert len(responses) == count, responses
+        assert all(future.result()["code"] == 0 for future in futures)
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        assert res["code"] == 0, res
+        assert res["data"]["doc"]["chunk_num"] == chunks_count + count

test/testcases/test_web_api/test_chunk_app/test_list_chunks.py

+#
+#  Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+import os
+from concurrent.futures import ThreadPoolExecutor, as_completed
+
+import pytest
+from common import batch_add_chunks, list_chunks
+from configs import INVALID_API_TOKEN
+from libs.auth import RAGFlowWebApiAuth
+
+
+@pytest.mark.p1
+class TestAuthorization:
+    @pytest.mark.parametrize(
+        "invalid_auth, expected_code, expected_message",
+        [
+            (None, 401, "<Unauthorized '401: Unauthorized'>"),
+            (RAGFlowWebApiAuth(INVALID_API_TOKEN), 401, "<Unauthorized '401: Unauthorized'>"),
+        ],
+    )
+    def test_invalid_auth(self, invalid_auth, expected_code, expected_message):
+        res = list_chunks(invalid_auth, {"doc_id": "document_id"})
+        assert res["code"] == expected_code, res
+        assert res["message"] == expected_message, res
+
+
+class TestChunksList:
+    @pytest.mark.p1
+    @pytest.mark.parametrize(
+        "params, expected_code, expected_page_size, expected_message",
+        [
+            pytest.param({"page": None, "size": 2}, 100, 0, """TypeError("int() argument must be a string, a bytes-like object or a real number, not 'NoneType'")""", marks=pytest.mark.skip),
+            pytest.param({"page": 0, "size": 2}, 100, 0, "ValueError('Search does not support negative slicing.')", marks=pytest.mark.skip),
+            ({"page": 2, "size": 2}, 0, 2, ""),
+            ({"page": 3, "size": 2}, 0, 1, ""),
+            ({"page": "3", "size": 2}, 0, 1, ""),
+            pytest.param({"page": -1, "size": 2}, 100, 0, "ValueError('Search does not support negative slicing.')", marks=pytest.mark.skip),
+            pytest.param({"page": "a", "size": 2}, 100, 0, """ValueError("invalid literal for int() with base 10: \'a\'")""", marks=pytest.mark.skip),
+        ],
+    )
+    def test_page(self, WebApiAuth, add_chunks, params, expected_code, expected_page_size, expected_message):
+        _, doc_id, _ = add_chunks
+        payload = {"doc_id": doc_id}
+        if params:
+            payload.update(params)
+        res = list_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            assert len(res["data"]["chunks"]) == expected_page_size, res
+        else:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p1
+    @pytest.mark.parametrize(
+        "params, expected_code, expected_page_size, expected_message",
+        [
+            ({"size": None}, 100, 0, """TypeError("int() argument must be a string, a bytes-like object or a real number, not 'NoneType'")"""),
+            pytest.param({"size": 0}, 0, 5, "", marks=pytest.mark.skipif(os.getenv("DOC_ENGINE") == "infinity", reason="Infinity does not support page_size=0")),
+            pytest.param({"size": 0}, 100, 0, "3013", marks=pytest.mark.skipif(os.getenv("DOC_ENGINE") in [None, "opensearch", "elasticsearch"], reason="Infinity does not support page_size=0")),
+            ({"size": 1}, 0, 1, ""),
+            ({"size": 6}, 0, 5, ""),
+            ({"size": "1"}, 0, 1, ""),
+            pytest.param({"size": -1}, 0, 5, "", marks=pytest.mark.skip),
+            pytest.param({"size": "a"}, 100, 0, """ValueError("invalid literal for int() with base 10: \'a\'")""", marks=pytest.mark.skip),
+        ],
+    )
+    def test_page_size(self, WebApiAuth, add_chunks, params, expected_code, expected_page_size, expected_message):
+        _, doc_id, _ = add_chunks
+        payload = {"doc_id": doc_id}
+        if params:
+            payload.update(params)
+        res = list_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            assert len(res["data"]["chunks"]) == expected_page_size, res
+        else:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p2
+    @pytest.mark.parametrize(
+        "params, expected_page_size",
+        [
+            ({"keywords": None}, 5),
+            ({"keywords": ""}, 5),
+            ({"keywords": "1"}, 1),
+            pytest.param({"keywords": "chunk"}, 4, marks=pytest.mark.skipif(os.getenv("DOC_ENGINE") == "infinity", reason="issues/6509")),
+            ({"keywords": "content"}, 1),
+            ({"keywords": "unknown"}, 0),
+        ],
+    )
+    def test_keywords(self, WebApiAuth, add_chunks, params, expected_page_size):
+        _, doc_id, _ = add_chunks
+        payload = {"doc_id": doc_id}
+        if params:
+            payload.update(params)
+        res = list_chunks(WebApiAuth, payload)
+        assert res["code"] == 0, res
+        assert len(res["data"]["chunks"]) == expected_page_size, res
+
+    @pytest.mark.p3
+    def test_invalid_params(self, WebApiAuth, add_chunks):
+        _, doc_id, _ = add_chunks
+        payload = {"doc_id": doc_id, "a": "b"}
+        res = list_chunks(WebApiAuth, payload)
+        assert res["code"] == 0, res
+        assert len(res["data"]["chunks"]) == 5, res
+
+    @pytest.mark.p3
+    def test_concurrent_list(self, WebApiAuth, add_chunks):
+        _, doc_id, _ = add_chunks
+        count = 100
+        with ThreadPoolExecutor(max_workers=5) as executor:
+            futures = [executor.submit(list_chunks, WebApiAuth, {"doc_id": doc_id}) for i in range(count)]
+        responses = list(as_completed(futures))
+        assert len(responses) == count, responses
+        assert all(len(future.result()["data"]["chunks"]) == 5 for future in futures)
+
+    @pytest.mark.p1
+    def test_default(self, WebApiAuth, add_document):
+        _, doc_id = add_document
+
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        chunks_count = res["data"]["doc"]["chunk_num"]
+        batch_add_chunks(WebApiAuth, doc_id, 31)
+        # issues/6487
+        from time import sleep
+
+        sleep(3)
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        assert res["code"] == 0
+        assert len(res["data"]["chunks"]) == 30
+        assert res["data"]["doc"]["chunk_num"] == chunks_count + 31

test/testcases/test_web_api/test_chunk_app/test_retrieval_chunks.py

+#
+#  Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+import os
+from concurrent.futures import ThreadPoolExecutor, as_completed
+
+import pytest
+from common import retrieval_chunks
+from configs import INVALID_API_TOKEN
+from libs.auth import RAGFlowWebApiAuth
+
+
+@pytest.mark.p1
+class TestAuthorization:
+    @pytest.mark.parametrize(
+        "invalid_auth, expected_code, expected_message",
+        [
+            (None, 401, "<Unauthorized '401: Unauthorized'>"),
+            (RAGFlowWebApiAuth(INVALID_API_TOKEN), 401, "<Unauthorized '401: Unauthorized'>"),
+        ],
+    )
+    def test_invalid_auth(self, invalid_auth, expected_code, expected_message):
+        res = retrieval_chunks(invalid_auth, {"kb_id": "dummy_kb_id", "question": "dummy question"})
+        assert res["code"] == expected_code, res
+        assert res["message"] == expected_message, res
+
+
+class TestChunksRetrieval:
+    @pytest.mark.p1
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_page_size, expected_message",
+        [
+            ({"question": "chunk", "kb_id": None}, 0, 4, ""),
+            ({"question": "chunk", "doc_ids": None}, 101, 0, "required argument are missing: kb_id; "),
+            ({"question": "chunk", "kb_id": None, "doc_ids": None}, 0, 4, ""),
+            ({"question": "chunk"}, 101, 0, "required argument are missing: kb_id; "),
+        ],
+    )
+    def test_basic_scenarios(self, WebApiAuth, add_chunks, payload, expected_code, expected_page_size, expected_message):
+        dataset_id, document_id, _ = add_chunks
+        if "kb_id" in payload:
+            payload["kb_id"] = [dataset_id]
+        if "doc_ids" in payload:
+            payload["doc_ids"] = [document_id]
+        res = retrieval_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            assert len(res["data"]["chunks"]) == expected_page_size, res
+        else:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p2
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_page_size, expected_message",
+        [
+            pytest.param(
+                {"page": None, "size": 2},
+                100,
+                0,
+                """TypeError("int() argument must be a string, a bytes-like object or a real number, not 'NoneType'")""",
+                marks=pytest.mark.skip,
+            ),
+            pytest.param(
+                {"page": 0, "size": 2},
+                100,
+                0,
+                "ValueError('Search does not support negative slicing.')",
+                marks=pytest.mark.skip,
+            ),
+            pytest.param({"page": 2, "size": 2}, 0, 2, "", marks=pytest.mark.skip(reason="issues/6646")),
+            ({"page": 3, "size": 2}, 0, 0, ""),
+            ({"page": "3", "size": 2}, 0, 0, ""),
+            pytest.param(
+                {"page": -1, "size": 2},
+                100,
+                0,
+                "ValueError('Search does not support negative slicing.')",
+                marks=pytest.mark.skip,
+            ),
+            pytest.param(
+                {"page": "a", "size": 2},
+                100,
+                0,
+                """ValueError("invalid literal for int() with base 10: 'a'")""",
+                marks=pytest.mark.skip,
+            ),
+        ],
+    )
+    def test_page(self, WebApiAuth, add_chunks, payload, expected_code, expected_page_size, expected_message):
+        dataset_id, _, _ = add_chunks
+        payload.update({"question": "chunk", "kb_id": [dataset_id]})
+        res = retrieval_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            assert len(res["data"]["chunks"]) == expected_page_size, res
+        else:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p3
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_page_size, expected_message",
+        [
+            pytest.param(
+                {"size": None},
+                100,
+                0,
+                """TypeError("int() argument must be a string, a bytes-like object or a real number, not 'NoneType'")""",
+                marks=pytest.mark.skip,
+            ),
+            # ({"size": 0}, 0, 0, ""),
+            ({"size": 1}, 0, 1, ""),
+            ({"size": 5}, 0, 4, ""),
+            ({"size": "1"}, 0, 1, ""),
+            # ({"size": -1}, 0, 0, ""),
+            pytest.param(
+                {"size": "a"},
+                100,
+                0,
+                """ValueError("invalid literal for int() with base 10: 'a'")""",
+                marks=pytest.mark.skip,
+            ),
+        ],
+    )
+    def test_page_size(self, WebApiAuth, add_chunks, payload, expected_code, expected_page_size, expected_message):
+        dataset_id, _, _ = add_chunks
+        payload.update({"question": "chunk", "kb_id": [dataset_id]})
+
+        res = retrieval_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            assert len(res["data"]["chunks"]) == expected_page_size, res
+        else:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p3
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_page_size, expected_message",
+        [
+            ({"vector_similarity_weight": 0}, 0, 4, ""),
+            ({"vector_similarity_weight": 0.5}, 0, 4, ""),
+            ({"vector_similarity_weight": 10}, 0, 4, ""),
+            pytest.param(
+                {"vector_similarity_weight": "a"},
+                100,
+                0,
+                """ValueError("could not convert string to float: 'a'")""",
+                marks=pytest.mark.skip,
+            ),
+        ],
+    )
+    def test_vector_similarity_weight(self, WebApiAuth, add_chunks, payload, expected_code, expected_page_size, expected_message):
+        dataset_id, _, _ = add_chunks
+        payload.update({"question": "chunk", "kb_id": [dataset_id]})
+        res = retrieval_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            assert len(res["data"]["chunks"]) == expected_page_size, res
+        else:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p2
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_page_size, expected_message",
+        [
+            ({"top_k": 10}, 0, 4, ""),
+            pytest.param(
+                {"top_k": 1},
+                0,
+                4,
+                "",
+                marks=pytest.mark.skipif(os.getenv("DOC_ENGINE") in ["infinity", "opensearch"], reason="Infinity"),
+            ),
+            pytest.param(
+                {"top_k": 1},
+                0,
+                1,
+                "",
+                marks=pytest.mark.skipif(os.getenv("DOC_ENGINE") in [None, "opensearch", "elasticsearch"], reason="elasticsearch"),
+            ),
+            pytest.param(
+                {"top_k": -1},
+                100,
+                4,
+                "must be greater than 0",
+                marks=pytest.mark.skipif(os.getenv("DOC_ENGINE") in ["infinity", "opensearch"], reason="Infinity"),
+            ),
+            pytest.param(
+                {"top_k": -1},
+                100,
+                4,
+                "3014",
+                marks=pytest.mark.skipif(os.getenv("DOC_ENGINE") in [None, "opensearch", "elasticsearch"], reason="elasticsearch"),
+            ),
+            pytest.param(
+                {"top_k": "a"},
+                100,
+                0,
+                """ValueError("invalid literal for int() with base 10: 'a'")""",
+                marks=pytest.mark.skip,
+            ),
+        ],
+    )
+    def test_top_k(self, WebApiAuth, add_chunks, payload, expected_code, expected_page_size, expected_message):
+        dataset_id, _, _ = add_chunks
+        payload.update({"question": "chunk", "kb_id": [dataset_id]})
+        res = retrieval_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            assert len(res["data"]["chunks"]) == expected_page_size, res
+        else:
+            assert expected_message in res["message"], res
+
+    @pytest.mark.skip
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_message",
+        [
+            ({"rerank_id": "BAAI/bge-reranker-v2-m3"}, 0, ""),
+            pytest.param({"rerank_id": "unknown"}, 100, "LookupError('Model(unknown) not authorized')", marks=pytest.mark.skip),
+        ],
+    )
+    def test_rerank_id(self, WebApiAuth, add_chunks, payload, expected_code, expected_message):
+        dataset_id, _, _ = add_chunks
+        payload.update({"question": "chunk", "kb_id": [dataset_id]})
+        res = retrieval_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            assert len(res["data"]["chunks"]) > 0, res
+        else:
+            assert expected_message in res["message"], res
+
+    @pytest.mark.skip
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_page_size, expected_message",
+        [
+            ({"keyword": True}, 0, 5, ""),
+            ({"keyword": "True"}, 0, 5, ""),
+            ({"keyword": False}, 0, 5, ""),
+            ({"keyword": "False"}, 0, 5, ""),
+            ({"keyword": None}, 0, 5, ""),
+        ],
+    )
+    def test_keyword(self, WebApiAuth, add_chunks, payload, expected_code, expected_page_size, expected_message):
+        dataset_id, _, _ = add_chunks
+        payload.update({"question": "chunk test", "kb_id": [dataset_id]})
+        res = retrieval_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if expected_code == 0:
+            assert len(res["data"]["chunks"]) == expected_page_size, res
+        else:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p3
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_highlight, expected_message",
+        [
+            ({"highlight": True}, 0, True, ""),
+            ({"highlight": "True"}, 0, True, ""),
+            pytest.param({"highlight": False}, 0, False, "", marks=pytest.mark.skip(reason="issues/6648")),
+            pytest.param({"highlight": "False"}, 0, False, "", marks=pytest.mark.skip(reason="issues/6648")),
+            pytest.param({"highlight": None}, 0, False, "", marks=pytest.mark.skip(reason="issues/6648")),
+        ],
+    )
+    def test_highlight(self, WebApiAuth, add_chunks, payload, expected_code, expected_highlight, expected_message):
+        dataset_id, _, _ = add_chunks
+        payload.update({"question": "chunk", "kb_id": [dataset_id]})
+        res = retrieval_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if expected_highlight:
+            for chunk in res["data"]["chunks"]:
+                assert "highlight" in chunk, res
+        else:
+            for chunk in res["data"]["chunks"]:
+                assert "highlight" not in chunk, res
+
+        if expected_code != 0:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p3
+    def test_invalid_params(self, WebApiAuth, add_chunks):
+        dataset_id, _, _ = add_chunks
+        payload = {"question": "chunk", "kb_id": [dataset_id], "a": "b"}
+        res = retrieval_chunks(WebApiAuth, payload)
+        assert res["code"] == 0, res
+        assert len(res["data"]["chunks"]) == 4, res
+
+    @pytest.mark.p3
+    def test_concurrent_retrieval(self, WebApiAuth, add_chunks):
+        dataset_id, _, _ = add_chunks
+        count = 100
+        payload = {"question": "chunk", "kb_id": [dataset_id]}
+
+        with ThreadPoolExecutor(max_workers=5) as executor:
+            futures = [executor.submit(retrieval_chunks, WebApiAuth, payload) for i in range(count)]
+        responses = list(as_completed(futures))
+        assert len(responses) == count, responses
+        assert all(future.result()["code"] == 0 for future in futures)

test/testcases/test_web_api/test_chunk_app/test_rm_chunks.py

+#
+#  Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+from concurrent.futures import ThreadPoolExecutor, as_completed
+
+import pytest
+from common import batch_add_chunks, delete_chunks, list_chunks
+from configs import INVALID_API_TOKEN
+from libs.auth import RAGFlowWebApiAuth
+
+
+@pytest.mark.p1
+class TestAuthorization:
+    @pytest.mark.parametrize(
+        "invalid_auth, expected_code, expected_message",
+        [
+            (None, 401, "<Unauthorized '401: Unauthorized'>"),
+            (RAGFlowWebApiAuth(INVALID_API_TOKEN), 401, "<Unauthorized '401: Unauthorized'>"),
+        ],
+    )
+    def test_invalid_auth(self, invalid_auth, expected_code, expected_message):
+        res = delete_chunks(invalid_auth, {"doc_id": "document_id", "chunk_ids": ["1"]})
+        assert res["code"] == expected_code
+        assert res["message"] == expected_message
+
+
+class TestChunksDeletion:
+    @pytest.mark.p3
+    @pytest.mark.parametrize(
+        "doc_id, expected_code, expected_message",
+        [
+            ("", 102, "Document not found!"),
+            ("invalid_document_id", 102, "Document not found!"),
+        ],
+    )
+    def test_invalid_document_id(self, WebApiAuth, add_chunks_func, doc_id, expected_code, expected_message):
+        _, _, chunk_ids = add_chunks_func
+        res = delete_chunks(WebApiAuth, {"doc_id": doc_id, "chunk_ids": chunk_ids})
+        assert res["code"] == expected_code, res
+        assert res["message"] == expected_message, res
+
+    @pytest.mark.parametrize(
+        "payload",
+        [
+            pytest.param(lambda r: {"chunk_ids": ["invalid_id"] + r}, marks=pytest.mark.p3),
+            pytest.param(lambda r: {"chunk_ids": r[:1] + ["invalid_id"] + r[1:4]}, marks=pytest.mark.p1),
+            pytest.param(lambda r: {"chunk_ids": r + ["invalid_id"]}, marks=pytest.mark.p3),
+        ],
+    )
+    def test_delete_partial_invalid_id(self, WebApiAuth, add_chunks_func, payload):
+        _, doc_id, chunk_ids = add_chunks_func
+        if callable(payload):
+            payload = payload(chunk_ids)
+        payload["doc_id"] = doc_id
+        res = delete_chunks(WebApiAuth, payload)
+        assert res["code"] == 0, res
+
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        assert res["code"] == 0, res
+        assert len(res["data"]["chunks"]) == 0, res
+        assert res["data"]["total"] == 0, res
+
+    @pytest.mark.p3
+    def test_repeated_deletion(self, WebApiAuth, add_chunks_func):
+        _, doc_id, chunk_ids = add_chunks_func
+        payload = {"chunk_ids": chunk_ids, "doc_id": doc_id}
+        res = delete_chunks(WebApiAuth, payload)
+        assert res["code"] == 0, res
+
+        res = delete_chunks(WebApiAuth, payload)
+        assert res["code"] == 102, res
+        assert res["message"] == "Index updating failure", res
+
+    @pytest.mark.p3
+    def test_duplicate_deletion(self, WebApiAuth, add_chunks_func):
+        _, doc_id, chunk_ids = add_chunks_func
+        payload = {"chunk_ids": chunk_ids * 2, "doc_id": doc_id}
+        res = delete_chunks(WebApiAuth, payload)
+        assert res["code"] == 0, res
+
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        assert res["code"] == 0, res
+        assert len(res["data"]["chunks"]) == 0, res
+        assert res["data"]["total"] == 0, res
+
+    @pytest.mark.p3
+    def test_concurrent_deletion(self, WebApiAuth, add_document):
+        count = 100
+        _, doc_id = add_document
+        chunk_ids = batch_add_chunks(WebApiAuth, doc_id, count)
+
+        with ThreadPoolExecutor(max_workers=5) as executor:
+            futures = [
+                executor.submit(
+                    delete_chunks,
+                    WebApiAuth,
+                    {"doc_id": doc_id, "chunk_ids": chunk_ids[i : i + 1]},
+                )
+                for i in range(count)
+            ]
+        responses = list(as_completed(futures))
+        assert len(responses) == count, responses
+        assert all(future.result()["code"] == 0 for future in futures)
+
+    @pytest.mark.p3
+    def test_delete_1k(self, WebApiAuth, add_document):
+        chunks_num = 1_000
+        _, doc_id = add_document
+        chunk_ids = batch_add_chunks(WebApiAuth, doc_id, chunks_num)
+
+        from time import sleep
+
+        sleep(1)
+
+        res = delete_chunks(WebApiAuth, {"doc_id": doc_id, "chunk_ids": chunk_ids})
+        assert res["code"] == 0
+
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        if res["code"] != 0:
+            assert False, res
+        assert len(res["data"]["chunks"]) == 0, res
+        assert res["data"]["total"] == 0, res
+
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_message, remaining",
+        [
+            pytest.param(None, 100, """TypeError("argument of type \'NoneType\' is not iterable")""", 5, marks=pytest.mark.skip),
+            pytest.param({"chunk_ids": ["invalid_id"]}, 102, "Index updating failure", 4, marks=pytest.mark.p3),
+            pytest.param("not json", 100, """UnboundLocalError("local variable \'duplicate_messages\' referenced before assignment")""", 5, marks=pytest.mark.skip(reason="pull/6376")),
+            pytest.param(lambda r: {"chunk_ids": r[:1]}, 0, "", 3, marks=pytest.mark.p3),
+            pytest.param(lambda r: {"chunk_ids": r}, 0, "", 0, marks=pytest.mark.p1),
+            pytest.param({"chunk_ids": []}, 0, "", 0, marks=pytest.mark.p3),
+        ],
+    )
+    def test_basic_scenarios(self, WebApiAuth, add_chunks_func, payload, expected_code, expected_message, remaining):
+        _, doc_id, chunk_ids = add_chunks_func
+        if callable(payload):
+            payload = payload(chunk_ids)
+        payload["doc_id"] = doc_id
+        res = delete_chunks(WebApiAuth, payload)
+        assert res["code"] == expected_code, res
+        if res["code"] != 0:
+            assert res["message"] == expected_message, res
+
+        res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+        if res["code"] != 0:
+            assert False, res
+        assert len(res["data"]["chunks"]) == remaining, res
+        assert res["data"]["total"] == remaining, res

test/testcases/test_web_api/test_chunk_app/test_update_chunk.py

+#
+#  Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+import os
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from random import randint
+from time import sleep
+
+import pytest
+from common import delete_document, list_chunks, update_chunk
+from configs import INVALID_API_TOKEN
+from libs.auth import RAGFlowWebApiAuth
+
+
+@pytest.mark.p1
+class TestAuthorization:
+    @pytest.mark.parametrize(
+        "invalid_auth, expected_code, expected_message",
+        [
+            (None, 401, "<Unauthorized '401: Unauthorized'>"),
+            (RAGFlowWebApiAuth(INVALID_API_TOKEN), 401, "<Unauthorized '401: Unauthorized'>"),
+        ],
+    )
+    def test_invalid_auth(self, invalid_auth, expected_code, expected_message):
+        res = update_chunk(invalid_auth, {"doc_id": "doc_id", "chunk_id": "chunk_id", "content_with_weight": "test"})
+        assert res["code"] == expected_code, res
+        assert res["message"] == expected_message, res
+
+
+class TestUpdateChunk:
+    @pytest.mark.p1
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_message",
+        [
+            ({"content_with_weight": None}, 100, "TypeError('expected string or bytes-like object')"),
+            ({"content_with_weight": ""}, 0, ""),
+            ({"content_with_weight": 1}, 100, "TypeError('expected string or bytes-like object')"),
+            ({"content_with_weight": "update chunk"}, 0, ""),
+            ({"content_with_weight": " "}, 0, ""),
+            ({"content_with_weight": "\n!?。；！？\"'"}, 0, ""),
+        ],
+    )
+    def test_content(self, WebApiAuth, add_chunks, payload, expected_code, expected_message):
+        _, doc_id, chunk_ids = add_chunks
+        chunk_id = chunk_ids[0]
+        update_payload = {"doc_id": doc_id, "chunk_id": chunk_id}
+        if payload:
+            update_payload.update(payload)
+        res = update_chunk(WebApiAuth, update_payload)
+        assert res["code"] == expected_code, res
+        if expected_code != 0:
+            assert res["message"] == expected_message, res
+        else:
+            sleep(1)
+            res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+            for chunk in res["data"]["chunks"]:
+                if chunk["chunk_id"] == chunk_id:
+                    assert chunk["content_with_weight"] == payload["content_with_weight"]
+
+    @pytest.mark.p2
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_message",
+        [
+            ({"important_kwd": ["a", "b", "c"]}, 0, ""),
+            ({"important_kwd": [""]}, 0, ""),
+            ({"important_kwd": [1]}, 100, "TypeError('sequence item 0: expected str instance, int found')"),
+            ({"important_kwd": ["a", "a"]}, 0, ""),
+            ({"important_kwd": "abc"}, 102, "`important_kwd` should be a list"),
+            ({"important_kwd": 123}, 102, "`important_kwd` should be a list"),
+        ],
+    )
+    def test_important_keywords(self, WebApiAuth, add_chunks, payload, expected_code, expected_message):
+        _, doc_id, chunk_ids = add_chunks
+        chunk_id = chunk_ids[0]
+        update_payload = {"doc_id": doc_id, "chunk_id": chunk_id, "content_with_weight": "unchanged content"}  # Add content_with_weight as it's required
+        if payload:
+            update_payload.update(payload)
+        res = update_chunk(WebApiAuth, update_payload)
+        assert res["code"] == expected_code, res
+        if expected_code != 0:
+            assert res["message"] == expected_message, res
+        else:
+            sleep(1)
+            res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+            for chunk in res["data"]["chunks"]:
+                if chunk["chunk_id"] == chunk_id:
+                    assert chunk["important_kwd"] == payload["important_kwd"]
+
+    @pytest.mark.p2
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_message",
+        [
+            ({"question_kwd": ["a", "b", "c"]}, 0, ""),
+            ({"question_kwd": [""]}, 0, ""),
+            ({"question_kwd": [1]}, 100, "TypeError('sequence item 0: expected str instance, int found')"),
+            ({"question_kwd": ["a", "a"]}, 0, ""),
+            ({"question_kwd": "abc"}, 102, "`question_kwd` should be a list"),
+            ({"question_kwd": 123}, 102, "`question_kwd` should be a list"),
+        ],
+    )
+    def test_questions(self, WebApiAuth, add_chunks, payload, expected_code, expected_message):
+        _, doc_id, chunk_ids = add_chunks
+        chunk_id = chunk_ids[0]
+        update_payload = {"doc_id": doc_id, "chunk_id": chunk_id, "content_with_weight": "unchanged content"}  # Add content_with_weight as it's required
+        if payload:
+            update_payload.update(payload)
+
+        res = update_chunk(WebApiAuth, update_payload)
+        assert res["code"] == expected_code, res
+        if expected_code != 0:
+            assert res["message"] == expected_message, res
+        else:
+            sleep(1)
+            res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+            for chunk in res["data"]["chunks"]:
+                if chunk["chunk_id"] == chunk_id:
+                    assert chunk["question_kwd"] == payload["question_kwd"]
+
+    @pytest.mark.p2
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_message",
+        [
+            ({"available_int": 1}, 0, ""),
+            ({"available_int": 0}, 0, ""),
+        ],
+    )
+    def test_available(self, WebApiAuth, add_chunks, payload, expected_code, expected_message):
+        _, doc_id, chunk_ids = add_chunks
+        chunk_id = chunk_ids[0]
+        update_payload = {"doc_id": doc_id, "chunk_id": chunk_id, "content_with_weight": "unchanged content"}
+        if payload:
+            update_payload.update(payload)
+
+        res = update_chunk(WebApiAuth, update_payload)
+        assert res["code"] == expected_code, res
+        if expected_code != 0:
+            assert res["message"] == expected_message, res
+        else:
+            sleep(1)
+            res = list_chunks(WebApiAuth, {"doc_id": doc_id})
+            for chunk in res["data"]["chunks"]:
+                if chunk["chunk_id"] == chunk_id:
+                    assert chunk["available_int"] == payload["available_int"]
+
+    @pytest.mark.p3
+    @pytest.mark.parametrize(
+        "doc_id_param, expected_code, expected_message",
+        [
+            ("", 102, "Tenant not found!"),
+            ("invalid_doc_id", 102, "Tenant not found!"),
+        ],
+    )
+    def test_invalid_document_id_for_update(self, WebApiAuth, add_chunks, doc_id_param, expected_code, expected_message):
+        _, _, chunk_ids = add_chunks
+        chunk_id = chunk_ids[0]
+
+        payload = {"doc_id": doc_id_param, "chunk_id": chunk_id, "content_with_weight": "test content"}
+        res = update_chunk(WebApiAuth, payload)
+        assert res["code"] == expected_code
+        assert expected_message in res["message"]
+
+    @pytest.mark.p3
+    def test_repeated_update_chunk(self, WebApiAuth, add_chunks):
+        _, doc_id, chunk_ids = add_chunks
+        payload1 = {"doc_id": doc_id, "chunk_id": chunk_ids[0], "content_with_weight": "chunk test 1"}
+        res = update_chunk(WebApiAuth, payload1)
+        assert res["code"] == 0
+
+        payload2 = {"doc_id": doc_id, "chunk_id": chunk_ids[0], "content_with_weight": "chunk test 2"}
+        res = update_chunk(WebApiAuth, payload2)
+        assert res["code"] == 0
+
+    @pytest.mark.p3
+    @pytest.mark.parametrize(
+        "payload, expected_code, expected_message",
+        [
+            ({"unknown_key": "unknown_value"}, 0, ""),
+            ({}, 0, ""),
+            pytest.param(None, 100, """TypeError("int() argument must be a string, a bytes-like object or a real number, not 'NoneType'")""", marks=pytest.mark.skip),
+        ],
+    )
+    def test_invalid_params(self, WebApiAuth, add_chunks, payload, expected_code, expected_message):
+        _, doc_id, chunk_ids = add_chunks
+        chunk_id = chunk_ids[0]
+        update_payload = {"doc_id": doc_id, "chunk_id": chunk_id, "content_with_weight": "unchanged content"}
+        if payload is not None:
+            update_payload.update(payload)
+
+        res = update_chunk(WebApiAuth, update_payload)
+        assert res["code"] == expected_code, res
+        if expected_code != 0:
+            assert res["message"] == expected_message, res
+
+    @pytest.mark.p3
+    @pytest.mark.skipif(os.getenv("DOC_ENGINE") == "infinity", reason="issues/6554")
+    def test_concurrent_update_chunk(self, WebApiAuth, add_chunks):
+        count = 50
+        _, doc_id, chunk_ids = add_chunks
+
+        with ThreadPoolExecutor(max_workers=5) as executor:
+            futures = [
+                executor.submit(
+                    update_chunk,
+                    WebApiAuth,
+                    {"doc_id": doc_id, "chunk_id": chunk_ids[randint(0, 3)], "content_with_weight": f"update chunk test {i}"},
+                )
+                for i in range(count)
+            ]
+        responses = list(as_completed(futures))
+        assert len(responses) == count, responses
+        assert all(future.result()["code"] == 0 for future in futures)
+
+    @pytest.mark.p3
+    def test_update_chunk_to_deleted_document(self, WebApiAuth, add_chunks):
+        _, doc_id, chunk_ids = add_chunks
+        delete_document(WebApiAuth, {"doc_id": doc_id})
+        payload = {"doc_id": doc_id, "chunk_id": chunk_ids[0], "content_with_weight": "test content"}
+        res = update_chunk(WebApiAuth, payload)
+        assert res["code"] == 102, res
+        assert res["message"] == "Tenant not found!", res