Remove collection after case run finished in test cases

Signed-off-by: del-zhenwu <zhenxiang.li@zilliz.com>

tests/python_test/collection/test_collection_count.py

@@ -447,6 +447,7 @@ class TestCollectionMultiCollections:
         for i in range(collection_num):
             stats = connect.get_collection_stats(collection_list[i])
             assert stats[row_count] == insert_count
+            connect.drop_collection(collection_list[i])
 
     @pytest.mark.level(2)
     def test_collection_count_multi_collections_binary(self, connect, binary_collection, insert_count):
@@ -469,6 +470,7 @@ class TestCollectionMultiCollections:
         for i in range(collection_num):
             stats = connect.get_collection_stats(collection_list[i])
             assert stats[row_count] == insert_count
+            connect.drop_collection(collection_list[i])
 
     @pytest.mark.level(2)
     @pytest.mark.tags(CaseLabel.tags_smoke)
@@ -495,3 +497,4 @@ class TestCollectionMultiCollections:
         for i in range(collection_num):
             stats = connect.get_collection_stats(collection_list[i])
             assert stats[row_count] == default_nb
+            connect.drop_collection(collection_list[i])

tests/python_test/collection/test_list_collections.py

@@ -29,10 +29,14 @@ class TestListCollections:
         expected: True
         '''
         collection_num = 50
+        collection_names = []
         for i in range(collection_num):
             collection_name = gen_unique_str(uid)
+            collection_names.append(collection_name)
             connect.create_collection(collection_name, default_fields)
             assert collection_name in connect.list_collections()
+        for i in range(collection_num):
+            connect.drop_collection(collection_names[i])
 
     @pytest.mark.level(2)
     def test_list_collections_without_connection(self, dis_connect):

tests/python_test/entity/test_insert.py

@@ -792,6 +792,8 @@ class TestInsertMultiCollections:
             assert len(ids) == default_nb
             stats = connect.get_collection_stats(collection_name)
             assert stats[row_count] == default_nb
+        for i in range(collection_num):
+            connect.drop_collection(collection_list[i])
 
     @pytest.mark.timeout(ADD_TIMEOUT)
     @pytest.mark.tags(CaseLabel.tags_smoke)

tests/python_test/entity/test_search.py

@@ -914,9 +914,11 @@ class TestSearchBase:
         num = 10
         top_k = 10
         nq = 20
+        collection_names = []
         for i in range(num):
             collection = gen_unique_str(uid + str(i))
             connect.create_collection(collection, default_fields)
+            collection_names.append(collection)
             entities, ids = init_data(connect, collection)
             assert len(ids) == default_nb
             query, vecs = gen_query_vectors(field_name, entities, top_k, nq, search_params=search_param)
@@ -927,6 +929,8 @@ class TestSearchBase:
                 assert check_id_result(res[i], ids[i])
                 assert res[i]._distances[0] < epsilon
                 assert res[i]._distances[1] > epsilon
+        for i in range(num):
+            connect.drop_collection(collection_names[i])
 
     @pytest.mark.skip("r0.3-test")
     def _test_query_entities_with_field_less_than_top_k(self, connect, id_collection):