Add tests

packages/backend-core/src/context/mainContext.ts

@@ -190,15 +190,9 @@ export async function doInAppMigrationContext<T>(
   appId: string,
   task: () => T
 ): Promise<T> {
-  try {
     return _doInAppContext(appId, task, {
       isMigrating: true,
     })
-  } finally {
-    updateContext({
-      isMigrating: undefined,
-    })
-  }
 }
 
 export function getIdentity(): IdentityContext | undefined {

packages/backend-core/src/context/tests/index.spec.ts

@@ -179,5 +179,23 @@ describe("context", () => {
         expect(context).toEqual(expected)
       })
     })
+
+    it("the context is not modified outside the delegate", async () => {
+      const appId = db.generateAppID()
+
+      expect(Context.get()).toBeUndefined()
+
+      await context.doInAppMigrationContext(appId, () => {
+        const context = Context.get()
+
+        const expected: ContextMap = {
+          appId,
+          isMigrating: true,
+        }
+        expect(context).toEqual(expected)
+      })
+
+      expect(Context.get()).toBeUndefined()
+    })
   })
 })