MongoDB/PyMongo: Fix tests about result ordering

Because the `ordered` option of `insert_many` is not being honored yet,
the result order of returned documents is indeterministic.
Using `.sort("_id", pymongo.ASCENDING)` does not improve the situation.

tests/adapter/test_pymongo.py

@@ -302,24 +302,26 @@ def test_pymongo_tutorial(
 
     # Querying for More Than One Document.
     # https://pymongo.readthedocs.io/en/stable/tutorial.html#querying-for-more-than-one-document
-    assert list(posts.find({"author": "Mike"})) == [
-        {
+    # TODO: Because the `ordered` option of `insert_many` is not being honored yet,
+    #       the result order of returned documents is indeterministic.
+    #       Using `.sort("_id", pymongo.ASCENDING)` does not improve the situation.
+    results = list(posts.find({"author": "Mike"}))
+    assert {
             "author": "Mike",
             "text": "My first blog post!",
             "tags": mock.ANY,
             "date": mock.ANY,
             "title": mock.ANY,
             "_id": mock.ANY,
-        },
-        {
+        } in results
+    assert {
             "author": "Mike",
             "text": "Another post!",
             "tags": mock.ANY,
             "date": mock.ANY,
             "title": mock.ANY,
             "_id": mock.ANY,
-        },
-    ]
+        } in results
 
     # Counting.
     # https://pymongo.readthedocs.io/en/stable/tutorial.html#counting