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/**
* Tests that the expired data is deleted correctly after an index is converted to TTL using the
* collMod command.
*
* @tags: [
* assumes_no_implicit_collection_creation_after_drop,
* multiversion_incompatible,
* requires_ttl_index,
* ]
*/
(function() {
"use strict";
// Runs TTL monitor constantly to speed up this test.
const conn = MongoRunner.runMongod({setParameter: 'ttlMonitorSleepSecs=1'});
const dbName = jsTestName();
const testDB = conn.getDB(dbName);
const coll = testDB.getCollection('coll');
assert.commandWorked(testDB.createCollection(coll.getName()));
coll.createIndex({a: 1});
const expireAfterSeconds = 5;
const waitForTTL = () => {
// The 'ttl.passes' metric is incremented when the TTL monitor starts processing the indexes, so
// we wait for it to be incremented twice to know that the TTL monitor finished processing the
// indexes at least once.
const ttlPasses = testDB.serverStatus().metrics.ttl.passes;
assert.soon(function() {
return testDB.serverStatus().metrics.ttl.passes > ttlPasses + 1;
});
};
// Inserts a measurement older than the TTL expiry. The data should be found.
const expired = new Date((new Date()).getTime() - (1000 * 10));
assert.commandWorked(coll.insert({a: expired}));
waitForTTL();
assert.eq(1, coll.find().itcount());
// Converts to a TTL index and checks the data is deleted.
assert.commandWorked(testDB.runCommand({
collMod: coll.getName(),
index: {
keyPattern: {a: 1},
expireAfterSeconds: expireAfterSeconds,
}
}));
waitForTTL();
assert.eq(0, coll.find().itcount());
MongoRunner.stopMongod(conn);
})();
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