1 files changed, 45 insertions, 0 deletions
diff --git a/testing/web-platform/tests/background-fetch/get-ids.https.window.js b/testing/web-platform/tests/background-fetch/get-ids.https.window.js
new file mode 100644
index 0000000000..4c8bf26190
--- /dev/null
+++ b/testing/web-platform/tests/background-fetch/get-ids.https.window.js
@@ -0,0 +1,45 @@
+// META: script=/service-workers/service-worker/resources/test-helpers.sub.js
+// META: script=resources/utils.js
+'use strict';
+
+// Covers functionality provided by BackgroundFetchManager.getIds(), which
+// exposes the keys of active background fetches.
+//
+// https://wicg.github.io/background-fetch/#background-fetch-manager-getIds
+
+promise_test(async test => {
+  const script = 'service_workers/sw.js';
+  const scope = 'service_workers/' + location.pathname;
+
+  const serviceWorkerRegistration =
+      await service_worker_unregister_and_register(test, script, scope);
+
+  assert_equals(
+      serviceWorkerRegistration.active, null,
+      'There must not be an activated worker');
+
+  const ids = await serviceWorkerRegistration.backgroundFetch.getIds();
+  assert_equals(ids.length, 0);
+
+}, 'BackgroundFetchManager.getIds() does not require an activated worker');
+
+backgroundFetchTest(async (test, backgroundFetch) => {
+  // There should not be any active background fetches at this point.
+  {
+    const ids = await backgroundFetch.getIds();
+    assert_equals(ids.length, 0);
+  }
+
+  const registrationId = uniqueId();
+  const registration =
+      await backgroundFetch.fetch(registrationId, 'resources/feature-name.txt');
+  assert_equals(registration.id, registrationId);
+
+  // The |registrationId| should be active, and thus be included in getIds().
+  {
+    const ids = await backgroundFetch.getIds();
+    assert_equals(ids.length, 1);
+    assert_equals(ids[0], registrationId);
+  }
+
+}, 'The BackgroundFetchManager exposes active fetches');