proxy-backend: add test for deprecated configuration

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

plugins/proxy-backend/package.json

@@ -48,6 +48,7 @@
     "yup": "^0.32.9"
   },
   "devDependencies": {
+    "@backstage/backend-test-utils": "workspace:^",
     "@backstage/cli": "workspace:^",
     "@backstage/config-loader": "workspace:^",
     "@types/http-proxy-middleware": "^0.19.3",

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

@@ -15,6 +15,7 @@
  */
 
 import { getVoidLogger, SingleHostDiscovery } from '@backstage/backend-common';
+import { mockServices } from '@backstage/backend-test-utils';
 import { ConfigReader } from '@backstage/config';
 import { Request, Response } from 'express';
 import * as http from 'http';
@@ -70,6 +71,32 @@ describe('createRouter', () => {
       expect(router).toBeDefined();
     });
 
+    it('supports deprecated proxy configuration', async () => {
+      const router = await createRouter({
+        config: mockServices.rootConfig({
+          data: {
+            proxy: {
+              '/test': {
+                target: 'https://example.com',
+                headers: {
+                  Authorization: 'Bearer supersecret',
+                },
+              },
+            },
+          },
+        }),
+        logger,
+        discovery,
+      });
+      expect(router).toBeDefined();
+      expect(mockCreateProxyMiddleware).toHaveBeenCalledWith(
+        expect.any(Function),
+        expect.objectContaining({
+          target: 'https://example.com',
+        }),
+      );
+    });
+
     it('revives request bodies when set', async () => {
       const router = await createRouter({
         config,

yarn.lock

@@ -8053,6 +8053,7 @@ __metadata:
   dependencies:
     "@backstage/backend-common": "workspace:^"
     "@backstage/backend-plugin-api": "workspace:^"
+    "@backstage/backend-test-utils": "workspace:^"
     "@backstage/cli": "workspace:^"
     "@backstage/config": "workspace:^"
     "@backstage/config-loader": "workspace:^"