mongodb/jstests/noPassthrough/absent_ns_field_in_index_specs.js

/**
 * Uses the 'disableIndexSpecNamespaceGeneration' server test parameter to disable the generation
 * of the 'ns' field for index specs to test the absence of the field.
 *
 * When the 'ns' field is missing from the index specs and the 'disableIndexSpecNamespaceGeneration'
 * server test parameter is disabled, the server should automatically add the 'ns' field to the
 * index specs missing it prior to returning them.
 *
 * @tags: [requires_replication, requires_persistence]
 */
(function() {
    'use strict';

    const dbName = 'test';
    const collName = 'absent_ns';

    let replSet = new ReplSetTest({name: 'absentNsField', nodes: 2});
    replSet.startSet();
    replSet.initiate();

    const primary = replSet.getPrimary();
    const primaryDB = primary.getDB(dbName);
    const primaryColl = primaryDB.getCollection(collName);

    const secondary = replSet.getSecondary();
    const secondaryDB = secondary.getDB(dbName);

    // The primary will not generate the 'ns' field for index specs, but the secondary will.
    assert.commandWorked(primary.getDB('admin').runCommand(
        {setParameter: 1, disableIndexSpecNamespaceGeneration: 1}));

    assert.commandWorked(primaryColl.insert({x: 100}));
    assert.commandWorked(primaryColl.createIndex({x: 1}));

    replSet.awaitReplication();

    let specPrimary =
        assert.commandWorked(primaryDB.runCommand({listIndexes: collName})).cursor.firstBatch[1];
    let specSecondary =
        assert.commandWorked(secondaryDB.runCommand({listIndexes: collName})).cursor.firstBatch[1];

    assert.eq(false, specPrimary.hasOwnProperty('ns'));
    assert.eq(true, specSecondary.hasOwnProperty('ns'));
    assert.eq(dbName + '.' + collName, specSecondary.ns);

    replSet.stopSet(/*signal=*/null, /*forRestart=*/true);

    // The primaries index spec has no 'ns' field and the secondaries index spec does have the 'ns'
    // field. Restart the nodes as standalone and ensure that the primaries index spec gets updated
    // with the 'ns' field. No changes should be necessary to the secondaries index spec, but
    // verify that it still has the 'ns' field.
    const options = {dbpath: primary.dbpath, noCleanData: true};
    let conn = MongoRunner.runMongod(options);
    assert.neq(null, conn, 'mongod was unable to start up with options: ' + tojson(options));

    let db = conn.getDB(dbName);
    let spec = assert.commandWorked(db.runCommand({listIndexes: collName})).cursor.firstBatch[1];

    assert.eq(true, spec.hasOwnProperty('ns'));
    assert.eq(dbName + '.' + collName, spec.ns);

    MongoRunner.stopMongod(conn);

    options.dbpath = secondary.dbpath;
    conn = MongoRunner.runMongod(options);
    assert.neq(null, conn, 'mongod was unable to start up with options: ' + tojson(options));

    db = conn.getDB(dbName);
    spec = assert.commandWorked(db.runCommand({listIndexes: collName})).cursor.firstBatch[1];

    assert.eq(true, spec.hasOwnProperty('ns'));
    assert.eq(dbName + '.' + collName, spec.ns);

    MongoRunner.stopMongod(conn);
}());