Add unified test for createChangeStream without saveResultAsEntity

Author: ShaneHarvey

source/unified-test-format/tests/valid-pass/poc-change-streams.json

@@ -94,6 +94,42 @@
     }
   ],
   "tests": [
+    {
+      "description": "saveResultAsEntity is optional for createChangeStream",
+      "runOnRequirements": [
+        {
+          "minServerVersion": "3.8.0",
+          "topologies": [
+            "replicaset"
+          ]
+        }
+      ],
+      "operations": [
+        {
+          "name": "createChangeStream",
+          "object": "client0",
+          "arguments": {
+            "pipeline": []
+          }
+        }
+      ],
+      "expectEvents": [
+        {
+          "client": "client0",
+          "events": [
+            {
+              "commandStartedEvent": {
+                "command": {
+                  "aggregate": 1
+                },
+                "commandName": "aggregate",
+                "databaseName": "admin"
+              }
+            }
+          ]
+        }
+      ]
+    },
     {
       "description": "Executing a watch helper on a MongoClient results in notifications for changes to all collections in all databases in the cluster.",
       "runOnRequirements": [

source/unified-test-format/tests/valid-pass/poc-change-streams.yml

@@ -59,6 +59,24 @@ initialData:
     documents: []
 
 tests:
+  - description: "saveResultAsEntity is optional for createChangeStream"
+    runOnRequirements:
+      - minServerVersion: "3.8.0"
+        topologies: [ replicaset ]
+    operations:
+      - name: createChangeStream
+        object: *client0
+        arguments:
+          pipeline: []
+    expectEvents:
+      - client: *client0
+        events:
+          - commandStartedEvent:
+              command:
+                aggregate: 1
+              commandName: aggregate
+              databaseName: admin
+
   - description: "Executing a watch helper on a MongoClient results in notifications for changes to all collections in all databases in the cluster."
     runOnRequirements:
       - minServerVersion: "3.8.0"