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/**
* Tests that dbStats and collStats report a non-zero freeStorageSize after records are inserted and
* then some deleted.
*
* @tags: [
* # inMemory will not have the freeStorageSize field.
* requires_persistence
* ]
*/
(function() {
"use strict";
const forceCheckpoint = () => {
assert.commandWorked(db.fsyncLock());
assert.commandWorked(db.fsyncUnlock());
};
const dbName = "freeStorageSizeTest";
const collName = "foo";
const testDB = db.getSiblingDB(dbName);
const coll = testDB.getCollection(collName);
const kDocsToInsert = 150;
const kDocsToRemove = kDocsToInsert / 2;
// Insert docs.
for (let i = 0; i < kDocsToInsert; i++) {
assert.commandWorked(coll.insert({a: i}));
}
forceCheckpoint();
// Remove docs to free up space.
assert.commandWorked(coll.remove({a: {$lt: kDocsToRemove}}));
forceCheckpoint();
// Check that freeStorageSize is non-zero.
let collStats = assert.commandWorked(testDB.runCommand({collStats: collName}));
assert(collStats.hasOwnProperty("freeStorageSize"), tojson(collStats));
assert.gt(collStats.freeStorageSize, 0);
let dbStats = assert.commandWorked(testDB.stats({freeStorage: 1}));
assert(dbStats.hasOwnProperty("freeStorageSize"), tojson(dbStats));
assert.gt(dbStats.freeStorageSize, 0);
assert.eq(dbStats.freeStorageSize, collStats.freeStorageSize);
})();
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