1 files changed, 33 insertions, 0 deletions
diff --git a/jstests/replsets/rslib.js b/jstests/replsets/rslib.js
index bff0a04182d..6635c4be14b 100644
--- a/jstests/replsets/rslib.js
+++ b/jstests/replsets/rslib.js
@@ -1,4 +1,6 @@
 var wait, occasionally, reconnect, getLatestOp, waitForAllMembers, reconfig, awaitOpTime;
+var waitUntilAllNodesCaughtUp;
+
 (function () {
 "use strict";
 var count = 0;
@@ -148,4 +150,35 @@ awaitOpTime = function (node, opTime) {
     });
 };
 
+/**
+ * Uses the results of running replSetGetStatus against an arbitrary replset node to wait until
+ * all nodes in the set are replicated through the same optime.
+ */
+waitUntilAllNodesCaughtUp = function(rs) {
+    var rsStatus;
+    var firstConflictingIndex;
+    var ot;
+    var otherOt;
+    assert.soon(function () {
+        rsStatus = rs[0].adminCommand('replSetGetStatus');
+        if (rsStatus.ok != 1) {
+            return false;
+        }
+        assert.eq(rs.length, rsStatus.members.length, tojson(rsStatus));
+        ot = rsStatus.members[0].optime;
+        for (var i = 1; i < rsStatus.members.length; ++i) {
+            otherOt = rsStatus.members[i].optime;
+            if (bsonWoCompare({ts: otherOt.ts}, {ts: ot.ts}) ||
+                bsonWoCompare({t: otherOt.t},  {t: ot.t})) {
+                firstConflictingIndex = i;
+                return false;
+            }
+        }
+        return true;
+    }, function () {
+        return "Optimes of members 0 (" + tojson(ot) + ") and " + firstConflictingIndex + " (" +
+            tojson(otherOt) + ") are different in " + tojson(rsStatus);
+    });
+};
+
 }());