SERVER-38435 Update assertion messages in txn broadcast writes fsm workloads

2 files changed, 13 insertions, 11 deletions

diff --git a/jstests/concurrency/fsm_workloads/random_moveChunk_broadcast_delete_transaction.js b/jstests/concurrency/fsm_workloads/random_moveChunk_broadcast_delete_transaction.js
index 941118fd0bf..c2f25915610 100644
--- a/jstests/concurrency/fsm_workloads/random_moveChunk_broadcast_delete_transaction.js
+++ b/jstests/concurrency/fsm_workloads/random_moveChunk_broadcast_delete_transaction.js
@@ -112,23 +112,24 @@ var $config = extendWorkload($config, function($config, $super) {
      */
     $config.states.verifyDocuments = function verifyDocuments(db, collName, connCache) {
         const docs = db[collName].find({tid: this.tid}).toArray();
-        assertWhenOwnColl.eq(this.expectedDocuments.length,
-                             docs.length,
-                             'unexpected number of documents, docs: ' + tojson(docs));
+        assertWhenOwnColl.eq(this.expectedDocuments.length, docs.length, () => {
+            return 'unexpected number of documents, docs: ' + tojson(docs) + ', expected docs: ' +
+                tojson(this.expectedDocuments);
+        });
 
         // Verify only the documents we haven't tried to delete were found.
         const expectedDocIds = new Set(this.expectedDocuments.map(doc => doc._id));
         docs.forEach(doc => {
-            assertWhenOwnColl(expectedDocIds.has(doc._id),
-                              'expected document to be deleted, doc: ' + tojson(doc));
+            assertWhenOwnColl(expectedDocIds.has(doc._id), () => {
+                return 'expected document to be deleted, doc: ' + tojson(doc);
+            });
             expectedDocIds.delete(doc._id);
         });
 
         // All expected document ids should have been found in the collection.
-        assertWhenOwnColl.eq(
-            0,
-            expectedDocIds.size,
-            'did not find all expected documents, _ids not found: ' + tojson(expectedDocIds));
+        assertWhenOwnColl.eq(0, expectedDocIds.size, () => {
+            return 'did not find all expected documents, _ids not found: ' + tojson(expectedDocIds);
+        });
     };
 
     /**
diff --git a/jstests/concurrency/fsm_workloads/random_moveChunk_broadcast_update_transaction.js b/jstests/concurrency/fsm_workloads/random_moveChunk_broadcast_update_transaction.js
index fc2757bd379..09f33544464 100644
--- a/jstests/concurrency/fsm_workloads/random_moveChunk_broadcast_update_transaction.js
+++ b/jstests/concurrency/fsm_workloads/random_moveChunk_broadcast_update_transaction.js
@@ -74,8 +74,9 @@ var $config = extendWorkload($config, function($config, $super) {
         const docs = db[collName].find({tid: this.tid}).toArray();
         docs.forEach(doc => {
             const expectedCounter = this.expectedCounters[doc._id];
-            assertWhenOwnColl.eq(
-                expectedCounter, doc.counter, 'unexpected counter value, doc: ' + tojson(doc));
+            assertWhenOwnColl.eq(expectedCounter, doc.counter, () => {
+                return 'unexpected counter value, doc: ' + tojson(doc);
+            });
         });
     };