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/**
 * Ensure that authorization system collections' indexes are correctly generated.
 *
 * This test requires users to persist across a restart.
 * @tags: [requires_persistence]
 */

(function() {
let conn = MongoRunner.runMongod();
let config = conn.getDB("config");
let db = conn.getDB("admin");

// TEST: User and role collections start off with no indexes
assert.eq(0, db.system.users.getIndexes().length);
assert.eq(0, db.system.roles.getIndexes().length);

// TEST: User and role creation generates indexes
db.createUser({user: "user", pwd: "pwd", roles: []});
assert.eq(2, db.system.users.getIndexes().length);

db.createRole({role: "role", privileges: [], roles: []});
assert.eq(2, db.system.roles.getIndexes().length);

// TEST: Destroying admin.system.users index and restarting will recreate it
assert.commandWorked(db.system.users.dropIndexes());
MongoRunner.stopMongod(conn);
conn = MongoRunner.runMongod({restart: conn, cleanData: false});
db = conn.getDB("admin");
assert.eq(2, db.system.users.getIndexes().length);
assert.eq(2, db.system.roles.getIndexes().length);

// TEST: Destroying admin.system.roles index and restarting will recreate it
assert.commandWorked(db.system.roles.dropIndexes());
MongoRunner.stopMongod(conn);
conn = MongoRunner.runMongod({restart: conn, cleanData: false});
db = conn.getDB("admin");
assert.eq(2, db.system.users.getIndexes().length);
assert.eq(2, db.system.roles.getIndexes().length);

// TEST: Destroying both authorization indexes and restarting will recreate them
assert.commandWorked(db.system.users.dropIndexes());
assert.commandWorked(db.system.roles.dropIndexes());
MongoRunner.stopMongod(conn);
conn = MongoRunner.runMongod({restart: conn, cleanData: false});
db = conn.getDB("admin");
assert.eq(2, db.system.users.getIndexes().length);
assert.eq(2, db.system.roles.getIndexes().length);

// TEST: Destroying the admin.system.users index and restarting will recreate it, even if
// admin.system.roles does not exist
// Use _mergeAuthzCollections to clear admin.system.users and admin.system.roles.
assert.commandWorked(db.adminCommand({
    _mergeAuthzCollections: 1,
    tempUsersCollection: 'admin.tempusers',
    tempRolesCollection: 'admin.temproles',
    db: "",
    drop: true
}));
db.createUser({user: "user", pwd: "pwd", roles: []});
assert.commandWorked(db.system.users.dropIndexes());
MongoRunner.stopMongod(conn);
conn = MongoRunner.runMongod({restart: conn, cleanData: false});
db = conn.getDB("admin");
assert.eq(2, db.system.users.getIndexes().length);

// TEST: Destroying the admin.system.roles index and restarting will recreate it, even if
// admin.system.users does not exist
// Use _mergeAuthzCollections to clear admin.system.users and admin.system.roles.
assert.commandWorked(db.adminCommand({
    _mergeAuthzCollections: 1,
    tempUsersCollection: 'admin.tempusers',
    tempRolesCollection: 'admin.temproles',
    db: "",
    drop: true
}));
db.createRole({role: "role", privileges: [], roles: []});
assert.commandWorked(db.system.roles.dropIndexes());
MongoRunner.stopMongod(conn);
conn = MongoRunner.runMongod({restart: conn, cleanData: false});
db = conn.getDB("admin");
assert.eq(2, db.system.roles.getIndexes().length);
MongoRunner.stopMongod(conn);
})();