SERVER-22360 disallow external sort in readOnly mode

1 files changed, 10 insertions, 0 deletions

diff --git a/jstests/readonly/aggregate.js b/jstests/readonly/aggregate.js
index 3bfaeab6a20..5710dec9139 100644
--- a/jstests/readonly/aggregate.js
+++ b/jstests/readonly/aggregate.js
@@ -93,6 +93,16 @@ runReadOnlyTest(function() {
                 {_id: "The Revenant", count: 3},
                 {_id: "Spotlight", count: 3}
             ]);
+
+            // Check that pipelines fail with allowDiskUse true. We use runCommand manually because
+            // the helper has conflicting error handling logic.
+            var allowDiskUseCmd = {aggregate: readableCollection.getName(),
+                                   pipeline: [],
+                                   allowDiskUse: true};
+
+            assert.commandFailedWithCode(readableCollection.runCommand(allowDiskUseCmd),
+                                         ErrorCodes.IllegalOperation,
+                                         "'allowDiskUse' is not allowed in read-only mode");
         }
     };
 }());