create list_dataset api and tests (#1138)

### What problem does this PR solve?

This PR have completed both HTTP API and Python SDK for 'list_dataset".
In addition, there are tests for it.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

sdk/python/test/test_dataset.py

@@ -1,10 +1,10 @@
 from test_sdkbase import TestSdk
-import ragflow
-from ragflow.ragflow import RAGFLow
+from ragflow import RAGFlow
 import pytest
-from unittest.mock import MagicMock
 from common import API_KEY, HOST_ADDRESS
 
+
+
 class TestDataset(TestSdk):
 
     def test_create_dataset(self):
@@ -15,12 +15,92 @@ class TestDataset(TestSdk):
         4. update the kb
         5. delete the kb
         '''
-        ragflow = RAGFLow(API_KEY, HOST_ADDRESS)
 
+        ragflow = RAGFlow(API_KEY, HOST_ADDRESS)
         # create a kb
         res = ragflow.create_dataset("kb1")
         assert res['code'] == 0 and res['message'] == 'success'
-        dataset_id = res['data']['dataset_id']
-        print(dataset_id)
+        dataset_name = res['data']['dataset_name']
+
+    def test_list_dataset_success(self):
+        ragflow = RAGFlow(API_KEY, HOST_ADDRESS)
+        # Call the list_datasets method
+        response = ragflow.list_dataset()
+
+        code, datasets = response
+
+        assert code == 200
+
+    def test_list_dataset_with_checking_size_and_name(self):
+        datasets_to_create = ["dataset1", "dataset2", "dataset3"]
+        ragflow = RAGFlow(API_KEY, HOST_ADDRESS)
+        created_response = [ragflow.create_dataset(name) for name in datasets_to_create]
+
+        real_name_to_create = set()
+        for response in created_response:
+            assert 'data' in response, "Response is missing 'data' key"
+            dataset_name = response['data']['dataset_name']
+            real_name_to_create.add(dataset_name)
+
+        status_code, listed_data = ragflow.list_dataset(0, 3)
+        listed_data = listed_data['data']
+
+        listed_names = {d['name'] for d in listed_data}
+        assert listed_names == real_name_to_create
+        assert status_code == 200
+        assert len(listed_data) == len(datasets_to_create)
+
+    def test_list_dataset_with_getting_empty_result(self):
+        ragflow = RAGFlow(API_KEY, HOST_ADDRESS)
+        datasets_to_create = []
+        created_response = [ragflow.create_dataset(name) for name in datasets_to_create]
+
+        real_name_to_create = set()
+        for response in created_response:
+            assert 'data' in response, "Response is missing 'data' key"
+            dataset_name = response['data']['dataset_name']
+            real_name_to_create.add(dataset_name)
+
+        status_code, listed_data = ragflow.list_dataset(0, 0)
+        listed_data = listed_data['data']
+
+        listed_names = {d['name'] for d in listed_data}
+        assert listed_names == real_name_to_create
+        assert status_code == 200
+        assert len(listed_data) == 0
+
+    def test_list_dataset_with_creating_100_knowledge_bases(self):
+        ragflow = RAGFlow(API_KEY, HOST_ADDRESS)
+        datasets_to_create = ["dataset1"] * 100
+        created_response = [ragflow.create_dataset(name) for name in datasets_to_create]
+
+        real_name_to_create = set()
+        for response in created_response:
+            assert 'data' in response, "Response is missing 'data' key"
+            dataset_name = response['data']['dataset_name']
+            real_name_to_create.add(dataset_name)
+
+        status_code, listed_data = ragflow.list_dataset(0, 100)
+        listed_data = listed_data['data']
+
+        listed_names = {d['name'] for d in listed_data}
+        assert listed_names == real_name_to_create
+        assert status_code == 200
+        assert len(listed_data) == 100
+
+    def test_list_dataset_with_showing_one_dataset(self):
+        ragflow = RAGFlow(API_KEY, HOST_ADDRESS)
+        response = ragflow.list_dataset(0, 1)
+        code, response = response
+        datasets = response['data']
+        assert len(datasets) == 1
+
+    def test_list_dataset_failure(self):
+        ragflow = RAGFlow(API_KEY, HOST_ADDRESS)
+        response = ragflow.list_dataset(-1, -1)
+        _, res = response
+        assert "IndexError" in res['message']
+
+
+
 
-        # TODO: list the kb