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/**
* Tests that listCollections shows the time-series buckets collection, but not the view, if the
* time-series view is missing.
*
* @tags: [
* does_not_support_transactions,
* requires_getmore,
* ]
*/
(function() {
'use strict';
const testDB = db.getSiblingDB(jsTestName());
assert.commandWorked(testDB.dropDatabase());
const timeFieldName = 'time';
const coll = testDB.getCollection('t');
assert.commandWorked(
testDB.createCollection(coll.getName(), {timeseries: {timeField: timeFieldName}}));
// Users are prohibited from dropping system.views when there are time-series collections present.
// However, this restriction isn't in place on earlier versions and its possible for users to
// upgrade to this version with a dropped system.views collection while having time-series
// collections present. This allows us to continue to test the behaviour of this scenario.
assert.commandWorked(
testDB.adminCommand({configureFailPoint: "allowSystemViewsDrop", mode: "alwaysOn"}));
assert(testDB.system.views.drop());
assert.commandWorked(
testDB.adminCommand({configureFailPoint: "allowSystemViewsDrop", mode: "off"}));
const collections = assert.commandWorked(testDB.runCommand({listCollections: 1})).cursor.firstBatch;
jsTestLog('Checking listCollections result: ' + tojson(collections));
assert.eq(collections.length, 1);
assert(collections.find(entry => entry.name === 'system.buckets.' + coll.getName()));
})();
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