test: add tests for notification clients

Signed-off-by: Heikki Hellgren <heikki.hellgren@op.fi>

plugins/notifications-node/package.json

@@ -22,7 +22,9 @@
     "postpack": "backstage-cli package postpack"
   },
   "devDependencies": {
-    "@backstage/cli": "workspace:^"
+    "@backstage/cli": "workspace:^",
+    "@backstage/test-utils": "workspace:^",
+    "msw": "^1.0.0"
   },
   "files": [
     "dist"

plugins/notifications-node/src/service/DefaultNotificationService.test.ts

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2024 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { setupRequestMockHandlers } from '@backstage/test-utils';
+import { rest } from 'msw';
+import { setupServer } from 'msw/node';
+import { NotificationPayload } from '@backstage/plugin-notifications-common';
+import {
+  DefaultNotificationService,
+  NotificationSendOptions,
+} from './DefaultNotificationService';
+
+const server = setupServer();
+
+const testNotification: NotificationPayload = {
+  title: 'Notification 1',
+  link: '/catalog',
+  severity: 'normal',
+};
+
+describe('DefaultNotificationService', () => {
+  setupRequestMockHandlers(server);
+  const mockBaseUrl = 'http://backstage/api/notifications';
+  const discoveryApi = {
+    getBaseUrl: async () => mockBaseUrl,
+    getExternalBaseUrl: async () => mockBaseUrl,
+  };
+  const tokenManager = {
+    getToken: async () => ({ token: '1234' }),
+    authenticate: jest.fn(),
+  };
+
+  let service: DefaultNotificationService;
+  beforeEach(() => {
+    service = DefaultNotificationService.create({
+      discovery: discoveryApi,
+      tokenManager,
+      pluginId: 'test',
+    });
+  });
+
+  describe('getNotifications', () => {
+    it('should create notification', async () => {
+      const body: NotificationSendOptions = {
+        recipients: { type: 'entity', entityRef: ['user:default/john.doe'] },
+        payload: testNotification,
+      };
+
+      server.use(
+        rest.post(`${mockBaseUrl}/`, async (req, res, ctx) => {
+          const json = await req.json();
+          expect(json).toEqual({ ...body, origin: 'plugin-test' });
+          expect(req.headers.get('Authorization')).toEqual('Bearer 1234');
+          return res(ctx.status(200));
+        }),
+      );
+      await expect(service.send(body)).resolves.not.toThrow();
+    });
+
+    it('should throw error if failing', async () => {
+      const body: NotificationSendOptions = {
+        recipients: { type: 'entity', entityRef: ['user:default/john.doe'] },
+        payload: testNotification,
+      };
+
+      server.use(
+        rest.post(`${mockBaseUrl}/`, async (req, res, ctx) => {
+          const json = await req.json();
+          expect(json).toEqual({ ...body, origin: 'plugin-test' });
+          expect(req.headers.get('Authorization')).toEqual('Bearer 1234');
+          return res(ctx.status(400));
+        }),
+      );
+      await expect(service.send(body)).rejects.toThrow();
+    });
+  });
+});

plugins/notifications-node/src/service/DefaultNotificationService.ts

@@ -60,7 +60,7 @@ export class DefaultNotificationService implements NotificationService {
     try {
       const baseUrl = await this.discovery.getBaseUrl('notifications');
       const { token } = await this.tokenManager.getToken();
-      await fetch(`${baseUrl}/notifications`, {
+      const response = await fetch(`${baseUrl}/`, {
         method: 'POST',
         body: JSON.stringify({
           ...notification,
@@ -69,9 +69,14 @@ export class DefaultNotificationService implements NotificationService {
         }),
         headers: {
           'Content-Type': 'application/json',
+          Accept: 'application/json',
           Authorization: `Bearer ${token}`,
         },
       });
+
+      if (!response.ok) {
+        throw new Error(`Request failed with status ${response.status}`);
+      }
     } catch (error) {
       // TODO: Should not throw in optimal case, see BEP
       throw new Error(`Failed to send notifications: ${error}`);