SERVER-27750 Handle and include LogicalTime in mongos request/response

1 files changed, 31 insertions, 0 deletions

diff --git a/jstests/sharding/logical_time_metadata.js b/jstests/sharding/logical_time_metadata.js
new file mode 100644
index 00000000000..efb1fcc785c
--- /dev/null
+++ b/jstests/sharding/logical_time_metadata.js
@@ -0,0 +1,31 @@
+/**
+ * Basic test that checks that mongos includes the logical time metatadata in it's response.
+ * This does not test logical time propagation via the shell as there are many back channels
+ * where the logical time metadata can propagated, making it inherently racy.
+ */
+(function() {
+    var st = new ShardingTest({shards: {rs0: {nodes: 3}}});
+    st.s.adminCommand({enableSharding: 'test'});
+
+    var db = st.s.getDB('test');
+
+    // insert on one shard and extract the logical time
+    var res = assert.commandWorked(db.runCommand({insert: 'user', documents: [{x: 10}]}));
+    assert.hasFields(res, ['logicalTime']);
+
+    var logicalTimeMetadata = res.logicalTime;
+    assert.hasFields(logicalTimeMetadata, ['clusterTime', 'signature']);
+
+    res = st.rs0.getPrimary().adminCommand({replSetGetStatus: 1});
+
+    var appliedTime = res.optimes.appliedOpTime.ts;
+    assert.eq(0,
+              timestampCmp(appliedTime, logicalTimeMetadata.clusterTime),
+              'appliedTime: ' + tojson(appliedTime) + ' != clusterTime: ' +
+                  tojson(logicalTimeMetadata.clusterTime));
+
+    assert.commandWorked(db.runCommand({ping: 1, logicalTime: logicalTimeMetadata}));
+
+    st.stop();
+
+})();