auth-backend-module-google-provider: add module test

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/auth-backend-module-google-provider/package.json

@@ -40,6 +40,7 @@
   "devDependencies": {
     "@backstage/backend-test-utils": "workspace:^",
     "@backstage/cli": "workspace:^",
+    "@backstage/plugin-auth-backend": "workspace:^",
     "@types/passport-google-oauth20": "^2.0.3",
     "msw": "^1.0.0",
     "supertest": "^6.1.3"

plugins/auth-backend-module-google-provider/src/module.test.ts

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2023 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 { mockServices, startTestBackend } from '@backstage/backend-test-utils';
+import { authPlugin } from '@backstage/plugin-auth-backend';
+import { authModuleGoogleProvider } from './module';
+import request from 'supertest';
+import { decodeOAuthState } from '@backstage/plugin-auth-node';
+
+describe('authModuleGoogleProvider', () => {
+  it('should start', async () => {
+    const { server } = await startTestBackend({
+      features: [
+        authPlugin,
+        authModuleGoogleProvider,
+        mockServices.rootConfig.factory({
+          data: {
+            app: {
+              baseUrl: 'http://localhost:3000',
+            },
+            auth: {
+              providers: {
+                google: {
+                  development: {
+                    clientId: 'my-client-id',
+                    clientSecret: 'my-client-secret',
+                  },
+                },
+              },
+            },
+          },
+        }),
+      ],
+    });
+
+    const agent = request.agent(server);
+
+    const res = await agent.get('/api/auth/google/start?env=development');
+
+    expect(res.status).toBe(302);
+
+    const nonceCookie = agent.jar.getCookie('google-nonce', {
+      domain: 'localhost',
+      path: '/api/auth/google/handler',
+      script: false,
+      secure: false,
+    });
+    expect(nonceCookie).toBeDefined();
+
+    const startUrl = new URL(res.get('location'));
+    expect(startUrl.origin).toBe('https://accounts.google.com');
+    expect(startUrl.pathname).toBe('/o/oauth2/v2/auth');
+    expect(Object.fromEntries(startUrl.searchParams)).toEqual({
+      access_type: 'offline',
+      prompt: 'consent',
+      response_type: 'code',
+      client_id: 'my-client-id',
+      redirect_uri: `http://localhost:${server.port()}/api/auth/google/handler/frame`,
+      state: expect.any(String),
+    });
+
+    expect(decodeOAuthState(startUrl.searchParams.get('state')!)).toEqual({
+      env: 'development',
+      nonce: decodeURIComponent(nonceCookie.value),
+    });
+  });
+});

yarn.lock

@@ -4556,6 +4556,7 @@ __metadata:
     "@backstage/backend-plugin-api": "workspace:^"
     "@backstage/backend-test-utils": "workspace:^"
     "@backstage/cli": "workspace:^"
+    "@backstage/plugin-auth-backend": "workspace:^"
     "@backstage/plugin-auth-node": "workspace:^"
     "@types/passport-google-oauth20": ^2.0.3
     google-auth-library: ^8.0.0