permission-backend: fix initial test suite

Signed-off-by: Mike Lewis <mtlewis@users.noreply.github.com>

plugins/permission-backend/api-report.md

@@ -5,7 +5,6 @@
 ```ts
 import { Config } from '@backstage/config';
 import express from 'express';
-import { IdentityClient } from '@backstage/plugin-auth-backend';
 import { Logger as Logger_2 } from 'winston';
 import { PermissionPolicy } from '@backstage/plugin-permission-node';
 
@@ -21,8 +20,6 @@ export interface RouterOptions {
   // (undocumented)
   config: Config;
   // (undocumented)
-  identity?: IdentityClient;
-  // (undocumented)
   logger: Logger_2;
   // (undocumented)
   policy: PermissionPolicy;

plugins/permission-backend/src/service/router.test.ts

@@ -18,7 +18,6 @@ import express from 'express';
 import request from 'supertest';
 import { getVoidLogger } from '@backstage/backend-common';
 import { ConfigReader } from '@backstage/config';
-import { IdentityClient } from '@backstage/plugin-auth-backend';
 import {
   AuthorizeResult,
   Permission,
@@ -27,9 +26,26 @@ import { PermissionPolicy } from '@backstage/plugin-permission-node';
 
 import { createRouter } from './router';
 
-const identityApi: Partial<IdentityClient> = {
-  authenticate: jest.fn().mockImplementation(_ => ({ id: 'test-user' })),
-};
+jest.mock('@backstage/plugin-auth-backend', () => {
+  class MockIdentityClient {
+    authenticate = jest.fn(token =>
+      Promise.resolve(
+        token
+          ? {
+              id: 'test-user',
+              token,
+            }
+          : undefined,
+      ),
+    );
+
+    static getBearerToken = jest.fn(authHeader =>
+      authHeader ? `<token for "${authHeader}">` : undefined,
+    );
+  }
+
+  return { IdentityClient: MockIdentityClient };
+});
 
 const policy: PermissionPolicy = {
   handle: jest.fn().mockImplementation((_req, identity) => {
@@ -58,8 +74,8 @@ describe('createRouter', () => {
         },
       }),
       policy,
-      identity: identityApi as IdentityClient,
     });
+
     app = express().use(router);
   });
 
@@ -86,18 +102,20 @@ describe('createRouter', () => {
     });
 
     it('resolves identity from the Authorization header', async () => {
-      const token = 'token';
+      const token = 'test-token';
       const response = await request(app)
         .post('/authorize')
         .auth(token, { type: 'bearer' })
         .send([{ id: 123, permission }]);
 
       expect(response.status).toEqual(200);
-      expect(identityApi.authenticate).toHaveBeenCalledWith('token');
       expect(policy.handle).toHaveBeenCalledWith(
         { permission },
-        { id: 'test-user' },
+        { id: 'test-user', token: '<token for "Bearer test-token">' },
       );
+      expect(response.body).toEqual([
+        { id: 123, result: AuthorizeResult.ALLOW },
+      ]);
     });
   });
 });

plugins/permission-backend/src/service/router.ts

@@ -46,7 +46,6 @@ export interface RouterOptions {
   logger: Logger;
   config: Config;
   policy: PermissionPolicy;
-  identity?: IdentityClient;
 }
 
 // TODO(permission-backend): probably move this to a separate client
@@ -131,12 +130,10 @@ export async function createRouter(
 ): Promise<express.Router> {
   const { config, policy } = options;
   const discovery = SingleHostDiscovery.fromConfig(config);
-  const identity =
-    options.identity ??
-    new IdentityClient({
-      discovery,
-      issuer: await discovery.getExternalBaseUrl('auth'),
-    });
+  const identity = new IdentityClient({
+    discovery,
+    issuer: await discovery.getExternalBaseUrl('auth'),
+  });
 
   const router = Router();
   router.use(express.json());