mongodb/jstests/sharding/logical_time_metadata.js

/**
 * Basic test that checks that mongos includes the cluster time metatadata in it's response.
 * This does not test cluster time propagation via the shell as there are many back channels
 * where the cluster time metadata can propagated, making it inherently racy.
 */
(function() {
"use strict";

function assertHasClusterTimeAndOperationTime(res) {
    assert.hasFields(res, ['$clusterTime']);
    assert.hasFields(res.$clusterTime, ['clusterTime', 'signature']);
}

var st = new ShardingTest({shards: {rs0: {nodes: 3}}});
st.s.adminCommand({enableSharding: 'test'});

var db = st.s.getDB('test');

var res = db.runCommand({insert: 'user', documents: [{x: 10}]});
assert.commandWorked(res);
assertHasClusterTimeAndOperationTime(res);

res = db.runCommand({blah: 'blah'});
assert.commandFailed(res);
assertHasClusterTimeAndOperationTime(res);

res = db.runCommand({insert: "user", documents: [{x: 10}], writeConcern: {blah: "blah"}});
assert.commandFailed(res);
assertHasClusterTimeAndOperationTime(res);

res = st.rs0.getPrimary().adminCommand({replSetGetStatus: 1});

// Cluster time may advance after replSetGetStatus finishes executing and before its logical
// time metadata is computed, in which case the response's $clusterTime will be greater than the
// appliedOpTime timestamp in its body. Assert the timestamp is <= $clusterTime to account for
// this.
var appliedTime = res.optimes.appliedOpTime.ts;
var logicalTimeMetadata = res.$clusterTime;
assert.lte(0,
           timestampCmp(appliedTime, logicalTimeMetadata.clusterTime),
           'appliedTime: ' + tojson(appliedTime) + ' not less than or equal to clusterTime: ' +
               tojson(logicalTimeMetadata.clusterTime));

assert.commandWorked(db.runCommand({ping: 1, '$clusterTime': logicalTimeMetadata}));

db = st.rs0.getPrimary().getDB('testRS');
res = db.runCommand({insert: 'user', documents: [{x: 10}]});
assert.commandWorked(res);
assertHasClusterTimeAndOperationTime(res);

res = db.runCommand({blah: 'blah'});
assert.commandFailed(res);
assertHasClusterTimeAndOperationTime(res);

res = db.runCommand({insert: "user", documents: [{x: 10}], writeConcern: {blah: "blah"}});
assert.commandFailed(res);
assertHasClusterTimeAndOperationTime(res);

st.stop();
})();