mongodb/jstests/change_streams/include_cluster_time.js

// Tests that each change in the stream will include the cluster time at which it happened.
//
// This test expects each change stream result to have an operationTime based on the clusterTime in
// the oplog entry. When operations get bundled into a transaction, their operationTime is instead
// based on the commit oplog entry, which would cause this test to fail.
// @tags: [change_stream_does_not_expect_txns]
(function() {
"use strict";

load("jstests/libs/change_stream_util.js");        // For assertInvalidateOp.
load("jstests/libs/collection_drop_recreate.js");  // For assertDropAndRecreateCollection.

// Drop and recreate the collections to be used in this set of tests.
const coll = assertDropAndRecreateCollection(db, "include_cluster_time");

const changeStream = coll.watch();

const insertClusterTime =
    assert.commandWorked(coll.runCommand("insert", {documents: [{_id: 0}]})).operationTime;

const updateClusterTime = assert
                              .commandWorked(coll.runCommand(
                                  "update", {updates: [{q: {_id: 0}, u: {$set: {updated: true}}}]}))
                              .operationTime;

const deleteClusterTime =
    assert.commandWorked(coll.runCommand("delete", {deletes: [{q: {_id: 0}, limit: 1}]}))
        .operationTime;

const dropClusterTime = assert.commandWorked(db.runCommand({drop: coll.getName()})).operationTime;

// Make sure each operation has a reasonable cluster time. Note that we should not assert
// that the cluster times are equal, because the cluster time returned from the command is
// generated by a second, independent read of the logical clock than the one used to
// generate the oplog entry. It's possible that the system did something to advance the time
// between the two reads of the clock.
assert.soon(() => changeStream.hasNext());
let next = changeStream.next();
assert.eq(next.operationType, "insert");
assert.lte(next.clusterTime, insertClusterTime);

assert.soon(() => changeStream.hasNext());
next = changeStream.next();
assert.eq(next.operationType, "update");
assert.lte(next.clusterTime, updateClusterTime);

assert.soon(() => changeStream.hasNext());
next = changeStream.next();
assert.eq(next.operationType, "delete");
assert.lte(next.clusterTime, deleteClusterTime);

assert.soon(() => changeStream.hasNext());
next = changeStream.next();
assert.eq(next.operationType, "drop");
assert.lte(next.clusterTime, dropClusterTime);

assertInvalidateOp({cursor: changeStream, opType: "drop"});

changeStream.close();
}());