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/**
* Tests that a change stream can use a user-specified, or collection-default collation.
*
* This test assumes that it will be able to drop and then re-create a collection with non-default
* options.
* @tags: [assumes_no_implicit_collection_creation_after_drop]
*/
(function() {
"use strict";
load("jstests/libs/change_stream_util.js"); // For 'ChangeStreamTest'.
let cst = new ChangeStreamTest(db);
const caseInsensitive = {locale: "en_US", strength: 2};
const caseInsensitiveCollection = db.change_stream_case_insensitive;
caseInsensitiveCollection.drop();
// Test that you can open a change stream before the collection exists, and it will use the
// simple collation.
const simpleCollationStream = cst.startWatchingChanges(
{pipeline: [{$changeStream: {}}], collection: caseInsensitiveCollection});
// Create the collection with a non-default collation - this should invalidate the stream we
// opened before it existed.
assert.commandWorked(
db.runCommand({create: caseInsensitiveCollection.getName(), collation: caseInsensitive}));
cst.assertNextChangesEqual({
cursor: simpleCollationStream,
expectedChanges: [{operationType: "invalidate"}],
expectInvalidate: true
});
const implicitCaseInsensitiveStream = cst.startWatchingChanges({
pipeline: [
{$changeStream: {}},
{$match: {"fullDocument.text": "abc"}},
// Be careful not to use _id in this projection, as startWatchingChanges() will exclude
// it by default, assuming it is the resume token.
{$project: {docId: "$documentKey._id"}}
],
collection: caseInsensitiveCollection
});
const explicitCaseInsensitiveStream = cst.startWatchingChanges({
pipeline: [
{$changeStream: {}},
{$match: {"fullDocument.text": "abc"}},
{$project: {docId: "$documentKey._id"}}
],
collection: caseInsensitiveCollection,
aggregateOptions: {collation: caseInsensitive}
});
assert.writeOK(caseInsensitiveCollection.insert({_id: 0, text: "aBc"}));
assert.writeOK(caseInsensitiveCollection.insert({_id: 1, text: "abc"}));
cst.assertNextChangesEqual(
{cursor: implicitCaseInsensitiveStream, expectedChanges: [{docId: 0}, {docId: 1}]});
cst.assertNextChangesEqual(
{cursor: explicitCaseInsensitiveStream, expectedChanges: [{docId: 0}, {docId: 1}]});
// Test that the collation does not apply to the scan over the oplog.
const similarNameCollection = db.cHaNgE_sTrEaM_cAsE_iNsEnSiTiVe;
similarNameCollection.drop();
assert.commandWorked(
db.runCommand({create: similarNameCollection.getName(), collation: {locale: "en_US"}}));
assert.writeOK(similarNameCollection.insert({_id: 0, text: "aBc"}));
assert.writeOK(caseInsensitiveCollection.insert({_id: 2, text: "ABC"}));
// The existing stream should not see the first insert (to the other collection), but should see
// the second.
cst.assertNextChangesEqual(
{cursor: implicitCaseInsensitiveStream, expectedChanges: [{docId: 2}]});
cst.assertNextChangesEqual(
{cursor: explicitCaseInsensitiveStream, expectedChanges: [{docId: 2}]});
// Test that creating a collection without a collation does not invalidate any change streams
// that were opened before the collection existed.
(function() {
const noCollationCollection = db.change_stream_no_collation;
noCollationCollection.drop();
const streamCreatedBeforeNoCollationCollection = cst.startWatchingChanges({
pipeline: [{$changeStream: {}}, {$project: {docId: "$documentKey._id"}}],
collection: noCollationCollection
});
assert.commandWorked(db.runCommand({create: noCollationCollection.getName()}));
assert.writeOK(noCollationCollection.insert({_id: 0}));
cst.assertNextChangesEqual(
{cursor: streamCreatedBeforeNoCollationCollection, expectedChanges: [{docId: 0}]});
}());
// Test that creating a collection and explicitly specifying the simple collation does not
// invalidate any change streams that were opened before the collection existed.
(function() {
const simpleCollationCollection = db.change_stream_simple_collation;
simpleCollationCollection.drop();
const streamCreatedBeforeSimpleCollationCollection = cst.startWatchingChanges({
pipeline: [{$changeStream: {}}, {$project: {docId: "$documentKey._id"}}],
collection: simpleCollationCollection
});
assert.commandWorked(db.runCommand(
{create: simpleCollationCollection.getName(), collation: {locale: "simple"}}));
assert.writeOK(simpleCollationCollection.insert({_id: 0}));
cst.assertNextChangesEqual(
{cursor: streamCreatedBeforeSimpleCollationCollection, expectedChanges: [{docId: 0}]});
}());
// Test that creating a change stream with a non-default collation, then creating a collection
// with the same collation will not invalidate the change stream.
(function() {
const frenchCollection = db.change_stream_french_collation;
frenchCollection.drop();
const frenchChangeStream = cst.startWatchingChanges({
pipeline: [{$changeStream: {}}, {$project: {docId: "$documentKey._id"}}],
aggregateOptions: {collation: {locale: "fr"}},
collection: frenchCollection
});
assert.commandWorked(
db.runCommand({create: frenchCollection.getName(), collation: {locale: "fr"}}));
assert.writeOK(frenchCollection.insert({_id: 0}));
cst.assertNextChangesEqual({cursor: frenchChangeStream, expectedChanges: [{docId: 0}]});
}());
// Test that creating a change stream with a non-default collation, then creating a collection
// with *a different* collation will not invalidate the change stream.
(function() {
const germanCollection = db.change_stream_german_collation;
germanCollection.drop();
const englishCaseInsensitiveStream = cst.startWatchingChanges({
pipeline: [
{$changeStream: {}},
{$match: {"fullDocument.text": "abc"}},
{$project: {docId: "$documentKey._id"}}
],
aggregateOptions: {collation: caseInsensitive},
collection: germanCollection
});
assert.commandWorked(
db.runCommand({create: germanCollection.getName(), collation: {locale: "de"}}));
assert.writeOK(germanCollection.insert({_id: 0, text: "aBc"}));
cst.assertNextChangesEqual(
{cursor: englishCaseInsensitiveStream, expectedChanges: [{docId: 0}]});
}());
// Test that creating a change stream with a non-default collation against a collection that has
// a non-simple default collation will use the collation specified on the operation.
(function() {
const caseInsensitiveCollection = db.change_stream_case_insensitive;
caseInsensitiveCollection.drop();
assert.commandWorked(db.runCommand(
{create: caseInsensitiveCollection.getName(), collation: caseInsensitive}));
const englishCaseSensitiveStream = cst.startWatchingChanges({
pipeline: [
{$changeStream: {}},
{$match: {"fullDocument.text": "abc"}},
{$project: {docId: "$documentKey._id"}}
],
aggregateOptions: {collation: {locale: "en_US"}},
collection: caseInsensitiveCollection
});
assert.writeOK(caseInsensitiveCollection.insert({_id: 0, text: "aBc"}));
assert.writeOK(caseInsensitiveCollection.insert({_id: 1, text: "abc"}));
cst.assertNextChangesEqual(
{cursor: englishCaseSensitiveStream, expectedChanges: [{docId: 1}]});
}());
// Test that collation is supported by the shell helper.
// Test that creating a change stream with a non-default collation against a collection that has
// a simple default collation will use the collation specified on the operation.
(function() {
const noCollationCollection = db.change_stream_no_collation;
noCollationCollection.drop();
assert.commandWorked(db.runCommand({create: noCollationCollection.getName()}));
const cursor = noCollationCollection.watch(
[
{$match: {"fullDocument.text": "abc"}},
{$project: {docId: "$documentKey._id", _id: 0}}
],
{collation: caseInsensitive});
assert(!cursor.hasNext());
assert.writeOK(noCollationCollection.insert({_id: 0, text: "aBc"}));
assert.writeOK(noCollationCollection.insert({_id: 1, text: "abc"}));
assert(cursor.hasNext());
assert.docEq(cursor.next(), {docId: 0});
assert(cursor.hasNext());
assert.docEq(cursor.next(), {docId: 1});
assert(!cursor.hasNext());
}());
})();
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