forked from mirrors/gecko-dev
73 lines
2.4 KiB
JavaScript
73 lines
2.4 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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function run_test() {
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// Set up profile. We will use profile path create some test files
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do_get_profile();
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// Start executing the tests
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run_next_test();
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}
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/**
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* Test that we correctly handle watching directories when hundreds of files
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* change simultaneously.
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*/
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add_task(async function test_fill_notification_buffer() {
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// Create and watch a sub-directory of the profile directory so we don't
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// catch notifications we're not interested in (i.e. "startupCache").
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let watchedDir = OS.Path.join(OS.Constants.Path.profileDir, "filewatcher_playground");
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await OS.File.makeDir(watchedDir);
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// The number of files to create.
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let numberOfFiles = 100;
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let fileNameBase = "testFile";
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// This will be used to keep track of the number of changes within the watched
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// directory.
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let detectedChanges = 0;
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// We expect at least the following notifications for each file:
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// - File creation
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// - File deletion
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let expectedChanges = numberOfFiles * 2;
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// Instantiate the native watcher.
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let watcher = makeWatcher();
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let deferred = Promise.defer();
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// Initialise the change callback.
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let changeCallback = function(changed) {
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info(changed + " has changed.");
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detectedChanges += 1;
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// Resolve the promise if we get all the expected changes.
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if (detectedChanges >= expectedChanges) {
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deferred.resolve();
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}
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};
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// Add the profile directory to the watch list and wait for the file watcher
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// to start watching it.
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await promiseAddPath(watcher, watchedDir, changeCallback, deferred.reject);
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// Create and then remove the files within the watched directory.
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for (let i = 0; i < numberOfFiles; i++) {
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let tmpFilePath = OS.Path.join(watchedDir, fileNameBase + i);
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await OS.File.writeAtomic(tmpFilePath, "test content");
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await OS.File.remove(tmpFilePath);
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}
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// Wait until the watcher informs us that all the files were
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// created, modified and removed.
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await deferred.promise;
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// Remove the watch and free the associated memory (we need to
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// reuse 'changeCallback' and 'errorCallback' to unregister).
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await promiseRemovePath(watcher, watchedDir, changeCallback, deferred.reject);
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});
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