89 lines
2.5 KiB
JavaScript
89 lines
2.5 KiB
JavaScript
/**
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* Tests for the $$NOW and $$CLUSTER_TIME system variable on a replica set.
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*/
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// @tags: [requires_find_command]
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(function() {
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"use strict";
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var replTest = new ReplSetTest({name: "now_and_cluster_time", nodes: 1});
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replTest.startSet();
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replTest.initiate();
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var db = replTest.getPrimary().getDB("test");
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const coll = db[jsTest.name()];
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coll.drop();
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db["viewWithNow"].drop();
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db["viewWithClusterTime"].drop();
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const numdocs = 1000;
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const bulk = coll.initializeUnorderedBulkOp();
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for (let i = 0; i < numdocs; ++i) {
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bulk.insert({_id: i});
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}
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assert.writeOK(bulk.execute());
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assert.commandWorked(
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db.createView("viewWithNow", coll.getName(), [{$addFields: {timeField: "$$NOW"}}]));
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const viewWithNow = db["viewWithNow"];
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assert.commandWorked(db.createView(
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"viewWithClusterTime", coll.getName(), [{$addFields: {timeField: "$$CLUSTER_TIME"}}]));
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const viewWithClusterTime = db["viewWithClusterTime"];
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function runTests(query) {
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const results = query().toArray();
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assert.eq(results.length, numdocs);
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// Make sure the values are the same for all documents
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for (let i = 0; i < numdocs; ++i) {
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assert.eq(results[0].timeField, results[i].timeField);
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}
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// Sleep for a while and then rerun.
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sleep(3000);
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const resultsLater = query().toArray();
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assert.eq(resultsLater.length, numdocs);
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// Later results should be later in time.
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assert.lte(results[0].timeField, resultsLater[0].timeField);
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}
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function baseCollectionNow() {
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return coll.aggregate([{$addFields: {timeField: "$$NOW"}}]);
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}
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function baseCollectionClusterTime() {
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return coll.aggregate([{$addFields: {timeField: "$$CLUSTER_TIME"}}]);
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}
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function fromViewWithNow() {
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return viewWithNow.find();
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}
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function fromViewWithClusterTime() {
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return viewWithClusterTime.find();
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}
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function withExprNow() {
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return viewWithNow.find({$expr: {$eq: ["$timeField", "$$NOW"]}});
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}
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function withExprClusterTime() {
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return viewWithClusterTime.find({$expr: {$eq: ["$timeField", "$$CLUSTER_TIME"]}});
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}
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// $$NOW
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runTests(baseCollectionNow);
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runTests(fromViewWithNow);
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runTests(withExprNow);
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// $$CLUSTER_TIME
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runTests(baseCollectionClusterTime);
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runTests(fromViewWithClusterTime);
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runTests(withExprClusterTime);
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replTest.stopSet();
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}());
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