feat: Add support for the Notification specification

test/unit/server/notifications/generate/DeleteNotificationGenerator.test.ts

@@ -0,0 +1,49 @@
+import type { ResourceIdentifier } from '../../../../../src/http/representation/ResourceIdentifier';
+import {
+  DeleteNotificationGenerator,
+} from '../../../../../src/server/notifications/generate/DeleteNotificationGenerator';
+import type { SubscriptionInfo } from '../../../../../src/server/notifications/SubscriptionStorage';
+import { AS } from '../../../../../src/util/Vocabularies';
+
+describe('A DeleteNotificationGenerator', (): void => {
+  const topic: ResourceIdentifier = { path: 'http://example.com/foo' };
+  const info: SubscriptionInfo = {
+    id: 'id',
+    topic: topic.path,
+    type: 'type',
+    features: {},
+    lastEmit: 0,
+  };
+  const activity = AS.terms.Delete;
+  const generator = new DeleteNotificationGenerator();
+
+  it('can only handle input with the Delete activity.', async(): Promise<void> => {
+    await expect(generator.canHandle({ topic, info })).rejects.toThrow('Only Delete activity updates are supported.');
+    await expect(generator.canHandle({ topic, info, activity: AS.terms.Update }))
+      .rejects.toThrow('Only Delete activity updates are supported.');
+    await expect(generator.canHandle({ topic, info, activity })).resolves.toBeUndefined();
+  });
+
+  it('generates a Delete notification.', async(): Promise<void> => {
+    const date = '1988-03-09T14:48:00.000Z';
+    const ms = Date.parse(date);
+    jest.useFakeTimers();
+    jest.setSystemTime(ms);
+
+    await expect(generator.handle({ topic, info, activity })).resolves.toEqual({
+      '@context': [
+        'https://www.w3.org/ns/activitystreams',
+        'https://www.w3.org/ns/solid/notification/v1',
+      ],
+      id: `urn:${ms}:http://example.com/foo`,
+      type: [ 'Delete' ],
+      object: {
+        id: 'http://example.com/foo',
+        type: [],
+      },
+      published: date,
+    });
+
+    jest.useRealTimers();
+  });
+});