TEST: Added test cases for Upload Documents HTTP API (#5991)

### What problem does this PR solve?

cover upload docments endpoints

### Type of change

- [x] add test cases

sdk/python/test/test_http_api/conftest.py

@@ -0,0 +1,73 @@
+#
+#  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 pytest
+from common import delete_dataset
+from libs.utils.file_utils import (
+    create_docx_file,
+    create_eml_file,
+    create_excel_file,
+    create_html_file,
+    create_image_file,
+    create_json_file,
+    create_md_file,
+    create_pdf_file,
+    create_ppt_file,
+    create_txt_file,
+)
+
+
+@pytest.fixture(scope="function", autouse=True)
+def clear_datasets(get_http_api_auth):
+    yield
+    delete_dataset(get_http_api_auth)
+
+
+@pytest.fixture
+def generate_test_files(tmp_path):
+    files = {}
+    files["docx"] = tmp_path / "ragflow_test.docx"
+    create_docx_file(files["docx"])
+
+    files["excel"] = tmp_path / "ragflow_test.xlsx"
+    create_excel_file(files["excel"])
+
+    files["ppt"] = tmp_path / "ragflow_test.pptx"
+    create_ppt_file(files["ppt"])
+
+    files["image"] = tmp_path / "ragflow_test.png"
+    create_image_file(files["image"])
+
+    files["pdf"] = tmp_path / "ragflow_test.pdf"
+    create_pdf_file(files["pdf"])
+
+    files["txt"] = tmp_path / "ragflow_test.txt"
+    create_txt_file(files["txt"])
+
+    files["md"] = tmp_path / "ragflow_test.md"
+    create_md_file(files["md"])
+
+    files["json"] = tmp_path / "ragflow_test.json"
+    create_json_file(files["json"])
+
+    files["eml"] = tmp_path / "ragflow_test.eml"
+    create_eml_file(files["eml"])
+
+    files["html"] = tmp_path / "ragflow_test.html"
+    create_html_file(files["html"])
+
+    return files