SERVER-61160 disallow dry run mode for collMod under applyOps

1 files changed, 10 insertions, 0 deletions

diff --git a/jstests/core/collmod_convert_to_unique_apply_ops.js b/jstests/core/collmod_convert_to_unique_apply_ops.js
index 3b272978c22..543648aebdb 100644
--- a/jstests/core/collmod_convert_to_unique_apply_ops.js
+++ b/jstests/core/collmod_convert_to_unique_apply_ops.js
@@ -73,6 +73,16 @@ jsTestLog('Duplicate key error from failed conversion: ' + tojson(duplicateKeyEr
 assert.eq(1, duplicateKeyError.applied, tojson(duplicateKeyError));
 assert.commandWorked(coll.remove({_id: 2}));
 
+// Dry run mode is not supported for running collMod through applyOps.
+// There should not be existing oplog entries with dryRun=true to route
+// through applyOps.
+const dryRunCmd = Object.extend({}, applyOpsCmd, true /* deep */);
+dryRunCmd.applyOps[0].o.dryRun = true;
+jsTestLog('Running collMod in dry run mode through applyOps: ' + tojson(dryRunCmd));
+const dryRunError =
+    assert.commandFailedWithCode(db.adminCommand(dryRunCmd), ErrorCodes.InvalidOptions);
+jsTestLog('Rejected dry run mode result: ' + tojson(dryRunError));
+
 // Successfully converts to a unique index.
 const result = assert.commandWorked(db.adminCommand(applyOpsCmd));