[FIX] app: make sure we maintain the correct prototype chain in env

src/app/app.ts

@@ -52,8 +52,9 @@ export class App<
       console.info(DEV_MSG());
       hasBeenLogged = true;
     }
-    const descrs = Object.getOwnPropertyDescriptors(config.env || {});
-    this.env = Object.freeze(Object.defineProperties({}, descrs)) as E;
+    const env = config.env || {};
+    const descrs = Object.getOwnPropertyDescriptors(env);
+    this.env = Object.freeze(Object.create(Object.getPrototypeOf(env), descrs));
     this.props = config.props || ({} as P);
   }
 

tests/components/env.test.ts

@@ -49,5 +49,7 @@ describe("env handling", () => {
 
     await new App(Test, { env }).mount(fixture);
     expect(child.env).toEqual(env);
+    // we check that the frozen env maintain the same prototype chain
+    expect(Object.getPrototypeOf(child.env)).toBe(Object.getPrototypeOf(env));
   });
 });