test_connection_failsafe_close.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*

 * This file tests edge-cases related to mozStorageService::unregisterConnection

 * in the face of failsafe closing at destruction time which results in

 * SpinningSynchronousClose being invoked which can "resurrect" the connection

 * and result in a second call to unregisterConnection.

 * See https://bugzilla.mozilla.org/show_bug.cgi?id=1413501 for more context.

*/

add_task(async function test_failsafe_close_of_async_connection() {

  // get the db

  let db = getOpenedDatabase();

  // do something async

  let callbackInvoked = new Promise(resolve => {

    db.executeSimpleSQLAsync("CREATE TABLE test (id INTEGER)", {

      handleCompletion: resolve,

});

});

  // drop our reference and force a GC so the only live reference is owned by

  // the async statement.

  db = gDBConn = null;

  // (we don't need to cycle collect)

  Cu.forceGC();

  // now we need to wait for that callback to have completed.

  await callbackInvoked;

  Assert.ok(true, "if we shutdown cleanly and do not crash, then we succeeded");

});