wip split w:0 server-side validation test and skip for OP_MSG

Author: jmikola

src/libmongoc/tests/json/crud/unified/insertOne-dots_and_dollars.json

@@ -601,6 +601,63 @@
           "documents": []
         }
       ]
+    },
+    {
+      "description": "Unacknowledged write using dollar-prefixed or dotted keys may be silently rejected on pre-3.6 server",
+      "runOnRequirements": [
+        {
+          "maxServerVersion": "3.4.99"
+        }
+      ],
+      "operations": [
+        {
+          "name": "insertOne",
+          "object": "collection1",
+          "arguments": {
+            "document": {
+              "_id": {
+                "$a": 1
+              }
+            }
+          },
+          "expectResult": {
+            "acknowledged": {
+              "$$unsetOrMatches": false
+            }
+          }
+        }
+      ],
+      "expectEvents": [
+        {
+          "client": "client0",
+          "events": [
+            {
+              "commandStartedEvent": {
+                "command": {
+                  "insert": "coll1",
+                  "documents": [
+                    {
+                      "_id": {
+                        "$a": 1
+                      }
+                    }
+                  ],
+                  "writeConcern": {
+                    "w": 0
+                  }
+                }
+              }
+            }
+          ]
+        }
+      ],
+      "outcome": [
+        {
+          "collectionName": "coll0",
+          "databaseName": "crud-tests",
+          "documents": []
+        }
+      ]
     }
   ]
 }

src/libmongoc/tests/unified/runner.c

@@ -58,6 +58,9 @@ skipped_unified_test_t SKIPPED_TESTS[] = {
    {"unacknowledged-updateMany-hint-clientError", "Unacknowledged updateMany with hint document fails with client-side error"},
    {"unacknowledged-updateOne-hint-clientError", "Unacknowledged updateOne with hint string fails with client-side error"},
    {"unacknowledged-updateOne-hint-clientError", "Unacknowledged updateOne with hint document fails with client-side error"},
+   /* libmongoc uses OP_MSG for unacknowledged writes, which will report the
+    * server-side validation failure */
+   {"insertOne-dots_and_dollars", "Unacknowledged write using dollar-prefixed or dotted keys may be silently rejected on pre-5.0 server"},
    /* CDRIVER-4001, DRIVERS-1781, and DRIVERS-1448: 5.0 cursor behavior */
    {"poc-command-monitoring", "A successful find event with a getmore and the server kills the cursor"},
    /* CDRIVER-3886: serverless testing (schema version 1.4) */