Add cases about offset and alias (#26067)

Signed-off-by: Nnico <cheng.yuan@zilliz.com>

tests/python_client/requirements.txt

@@ -12,7 +12,7 @@ allure-pytest==2.7.0
 pytest-print==0.2.1
 pytest-level==0.1.1
 pytest-xdist==2.5.0
-pymilvus==2.4.0.dev109
+pymilvus==2.4.0.dev115
 pytest-rerunfailures==9.1.1
 git+https://github.com/Projectplace/pytest-tags
 ndg-httpsclient

tests/python_client/testcases/test_collection.py

@@ -3805,7 +3805,8 @@ class TestCollectionString(TestcaseBase):
         schema = self.collection_schema_wrap.init_collection_schema(fields=fields)[0]
         self.init_collection_wrap(schema=schema, check_task=CheckTasks.check_collection_property,
                                   check_items={"schema": schema, "primary": ct.default_string_field_name})
-        
+
+
 class TestCollectionJSON(TestcaseBase):
     """
     ******************************************************************
@@ -3884,5 +3885,3 @@ class TestCollectionJSON(TestcaseBase):
         self.collection_wrap.init_collection(name=c_name, schema=schema,
                                              check_task=CheckTasks.check_collection_property,
                                              check_items={exp_name: c_name, exp_schema: schema})
-
-

tests/python_client/testcases/test_search.py

@@ -5425,6 +5425,26 @@ class TestSearchPagination(TestcaseBase):
             # assert sorted(search_res[0].distances, key=numpy.float32) == sorted(res_distance, key=numpy.float32)
             assert set(search_res[0].ids) == set(res[0].ids[offset:])
 
+    @pytest.mark.tags(CaseLabel.L2)
+    @pytest.mark.parametrize("offset", [100, default_nb // 2])
+    def test_search_offset_different_position(self, offset):
+        """
+        target: test search pagination with offset in different position
+        method: create connection, collection, insert entities and search with offset
+        expected: search successfully
+        """
+        # 1. initialize
+        collection_w = self.init_collection_general(prefix, True)[0]
+        # 2. search with offset in params
+        search_params = {"metric_type": "COSINE", "params": {"nprobe": 10}, "offset": offset}
+        res1 = collection_w.search(vectors[:default_nq], default_search_field,
+                                   search_params, default_limit)[0]
+
+        # 3. search with offset outside params
+        res2 = collection_w.search(vectors[:default_nq], default_search_field, default_search_params,
+                                   default_limit, offset=offset)[0]
+        assert res1[0].ids == res2[0].ids
+
 
 class TestSearchPaginationInvalid(TestcaseBase):
     """ Test case of search pagination """

tests/python_client/testcases/test_utility.py

@@ -1647,6 +1647,33 @@ class TestUtilityBase(TestcaseBase):
         assert collection_alias[0] in collections
         assert old_collection_name not in collections
 
+    @pytest.mark.tags(CaseLabel.L2)
+    def test_create_alias_using_dropped_collection_name(self):
+        """
+        target: test create alias using a dropped collection name
+        method: create 2 collections and drop one collection
+        expected: raise no exception
+        """
+        # 1. create 2 collections
+        a_name = cf.gen_unique_str("aa")
+        b_name = cf.gen_unique_str("bb")
+        self.init_collection_wrap(name=a_name, schema=default_schema,
+                                  check_task=CheckTasks.check_collection_property,
+                                  check_items={exp_name: a_name, exp_schema: default_schema})
+        self.init_collection_wrap(name=b_name, schema=default_schema,
+                                  check_task=CheckTasks.check_collection_property,
+                                  check_items={exp_name: b_name, exp_schema: default_schema})
+
+        # 2. drop collection a
+        self.utility_wrap.drop_collection(a_name)
+        assert self.utility_wrap.has_collection(a_name)[0] is False
+        assert len(self.utility_wrap.list_aliases(b_name)[0]) == 0
+
+        # 3. create alias with the name of collection a
+        self.utility_wrap.create_alias(b_name, a_name)
+        b_alias, _ = self.utility_wrap.list_aliases(b_name)
+        assert a_name in b_alias
+
 
 class TestUtilityAdvanced(TestcaseBase):
     """ Test case of index interface """