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/**
* Test that change streams returns 'create' and 'createIndexes' events from chunk migration when
* showSystemEvents is set.
*
* @tags: [
* requires_fcv_60,
* requires_sharding,
* uses_change_streams,
* change_stream_does_not_expect_txns,
* assumes_unsharded_collection,
* assumes_read_preference_unchanged,
* ]
*/
(function() {
"use strict";
load("jstests/libs/collection_drop_recreate.js"); // For assertDropCollection.
load('jstests/libs/change_stream_util.js'); // For 'ChangeStreamTest' and
// 'assertChangeStreamEventEq'.
const dbName = jsTestName();
const collName = "test";
const collNS = dbName + "." + collName;
const ns = {
db: dbName,
coll: collName
};
const numDocs = 1;
const st = new ShardingTest({
shards: 2,
rs: {nodes: 1, setParameter: {writePeriodicNoops: true, periodicNoopIntervalSecs: 1}}
});
const mongosConn = st.s;
const db = mongosConn.getDB(dbName);
const test = new ChangeStreamTest(db);
function getCollectionUuid(coll) {
const collInfo = db.getCollectionInfos({name: coll})[0];
return collInfo.info.uuid;
}
function assertMigrateEventObserved(cursor, expectedEvent) {
let events = test.getNextChanges(cursor, 1);
let event = events[0];
// Check the presence and the type of 'wallTime' field. We have no way to check the correctness
// of 'wallTime' value, so we delete it afterwards.
assert(event.wallTime instanceof Date);
delete event.wallTime;
expectedEvent.collectionUUID = getCollectionUuid(collName);
assertChangeStreamEventEq(event, expectedEvent);
return event._id;
}
function prepareCollection() {
assertDropCollection(db, collName);
assert.commandWorked(db.runCommand({create: collName}));
assert.commandWorked(
db.runCommand({createIndexes: collName, indexes: [{key: {x: 1}, name: "idx_x"}]}));
assert.commandWorked(st.s.adminCommand({shardCollection: collNS, key: {_id: 1}}));
assert.commandWorked(st.s.adminCommand({split: collNS, middle: {_id: 0}}));
}
// Test that create and createIndexes events are observable with migration.
function validateCreateEventsFromChunkMigration() {
prepareCollection();
let pipeline = [
{$changeStream: {showExpandedEvents: true, showSystemEvents: true}},
];
let cursor = test.startWatchingChanges({pipeline, collection: collName});
assert.commandWorked(
db.adminCommand({moveChunk: collNS, find: {_id: 0}, to: st.shard1.shardName}));
test.assertNextChangesEqual({
cursor: cursor,
expectedChanges: {
operationType: "create",
ns: ns,
}
});
test.assertNextChangesEqual({
cursor: cursor,
expectedChanges: {
operationType: "createIndexes",
ns: ns,
}
});
}
// Test that if showSystemEvents is false, we do not see the create and createIndexes events from
// chunk migration.
function validateShowSystemEventsFalse() {
prepareCollection();
let pipeline = [
{$changeStream: {showExpandedEvents: true, showSystemEvents: false}},
];
let cursor = test.startWatchingChanges({pipeline, collection: collName});
assert.commandWorked(
db.adminCommand({moveChunk: collNS, find: {_id: 0}, to: st.shard1.shardName}));
assert.commandWorked(db[collName].insert({_id: 1, x: 1}));
// Confirm that we don't observe the create event in the stream, but only see
// the subsequent insert.
test.assertNextChangesEqual({
cursor: cursor,
expectedChanges: {
operationType: "insert",
ns: ns,
fullDocument: {_id: 1, x: 1},
documentKey: {_id: 1},
}
});
}
assert.commandWorked(db.adminCommand({enableSharding: dbName}));
assert.commandWorked(st.s.adminCommand({movePrimary: dbName, to: st.shard0.shardName}));
validateCreateEventsFromChunkMigration();
validateShowSystemEventsFalse();
st.stop();
}());
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