fix handling of collection

Author: blink1073

test/asynchronous/test_cursor.py

@@ -368,7 +368,11 @@ async def test_explain_csot(self):
         client = await self.async_rs_or_single_client(event_listeners=[listener])
 
         # Create a collection, referred to as collection, with the namespace explain-test.collection.
-        collection = await client["explain-test"].create_collection("collection")
+        names = await client["explain-test"].list_collection_names()
+        if "collection" not in names:
+            collection = await client["explain-test"].create_collection("collection")
+        else:
+            collection = client["explain-test"]["collection"]
 
         # Run an explained find on collection. The find will have the query predicate { name: 'john doe' }. Specify a maxTimeMS value of 2000ms for the explain.
         with pymongo.timeout(2.0):

test/test_cursor.py

@@ -360,7 +360,11 @@ def test_explain_csot(self):
         client = self.rs_or_single_client(event_listeners=[listener])
 
         # Create a collection, referred to as collection, with the namespace explain-test.collection.
-        collection = client["explain-test"].create_collection("collection")
+        names = client["explain-test"].list_collection_names()
+        if "collection" not in names:
+            collection = client["explain-test"].create_collection("collection")
+        else:
+            collection = client["explain-test"]["collection"]
 
         # Run an explained find on collection. The find will have the query predicate { name: 'john doe' }. Specify a maxTimeMS value of 2000ms for the explain.
         with pymongo.timeout(2.0):