From b380354ddd1de112c1e3b58ca9911b44f7e4a968 Mon Sep 17 00:00:00 2001
From: Patrik Oldsberg <poldsberg@gmail.com>
Date: Wed, 22 Oct 2025 23:12:17 +0200
Subject: [PATCH] backend-app-api: test for module loading rule

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
---
 .../src/wiring/BackendInitializer.test.ts     | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/packages/backend-app-api/src/wiring/BackendInitializer.test.ts b/packages/backend-app-api/src/wiring/BackendInitializer.test.ts
index 9e8a6579fd..10d3cceba0 100644
--- a/packages/backend-app-api/src/wiring/BackendInitializer.test.ts
+++ b/packages/backend-app-api/src/wiring/BackendInitializer.test.ts
@@ -57,6 +57,42 @@ const testPlugin = createBackendPlugin({
 });
 
 describe('BackendInitializer', () => {
+  it('should only load modules if the plugin is present', async () => {
+    let loadedModule = false;
+    const backend1 = new BackendInitializer(baseFactories);
+    const testModule = createBackendModule({
+      pluginId: 'test',
+      moduleId: 'producer',
+      register(reg) {
+        reg.registerInit({
+          deps: {},
+          async init() {
+            loadedModule = true;
+          },
+        });
+      },
+    });
+    await backend1.add(testModule);
+    await backend1.start();
+    expect(loadedModule).toBe(false);
+
+    const backend2 = new BackendInitializer(baseFactories);
+    await backend2.add(testModule);
+    await backend2.add(
+      createBackendPlugin({
+        pluginId: 'test',
+        register(reg) {
+          reg.registerInit({
+            deps: {},
+            async init() {},
+          });
+        },
+      }),
+    );
+    await backend2.start();
+    expect(loadedModule).toBe(true);
+  });
+
   it('should initialize root scoped services', async () => {
     const ref1 = createServiceRef<{ x: number }>({
       id: '1',