feat: Add support for the Notification specification

test/unit/server/notifications/serialize/JsonLdNotificationSerializer.test.ts

@@ -0,0 +1,37 @@
+import type { Notification } from '../../../../../src/server/notifications/Notification';
+import {
+  JsonLdNotificationSerializer,
+} from '../../../../../src/server/notifications/serialize/JsonLdNotificationSerializer';
+import type { SubscriptionInfo } from '../../../../../src/server/notifications/SubscriptionStorage';
+import { readableToString } from '../../../../../src/util/StreamUtil';
+
+describe('A JsonLdNotificationSerializer', (): void => {
+  const info: SubscriptionInfo = {
+    id: 'id',
+    topic: 'http://example.com/foo',
+    type: 'type',
+    features: {},
+    lastEmit: 0,
+  };
+  const notification: Notification = {
+    '@context': [
+      'https://www.w3.org/ns/activitystreams',
+      'https://www.w3.org/ns/solid/notification/v1',
+    ],
+    id: `urn:123:http://example.com/foo`,
+    type: [ 'Update' ],
+    object: {
+      id: 'http://example.com/foo',
+      type: [],
+    },
+    published: '123',
+  };
+
+  const serializer = new JsonLdNotificationSerializer();
+
+  it('converts notifications into JSON-LD.', async(): Promise<void> => {
+    const representation = await serializer.handle({ notification, info });
+    expect(representation.metadata.contentType).toBe('application/ld+json');
+    expect(JSON.parse(await readableToString(representation.data))).toEqual(notification);
+  });
+});