chore(*): Rename __factory identifier to __ident and apply it to mocked methods as well

Author: martinjlowm

src/repository/repository.ts

@@ -1,3 +1,5 @@
+import { applyIdentityProperty } from '../utils/applyIdentityProperty';
+
 // eslint-disable-next-line
 type Factory = (...args: any[]) => any;
 
@@ -16,36 +18,7 @@ export class Repository {
   }
 
   public registerFactory(key: string, factory: Factory): void {
-    const proxy: Factory = new Proxy(
-      factory,
-      {
-        apply(target: Factory, _this: unknown, args: Parameters<Factory>): ReturnType<Factory> {
-          const mock: ReturnType<Factory> = target(...args);
-
-          if (typeof mock === 'undefined') {
-            return;
-          }
-
-          if (!(mock instanceof Object)) {
-            return mock;
-          }
-
-          if (typeof mock.__factory !== 'undefined') {
-            return mock;
-          }
-
-          Object.defineProperty(mock, '__factory', {
-            enumerable: false,
-            writable: false,
-            value: key,
-          });
-
-          return mock;
-        },
-      },
-    );
-
-    this._repository[key] = proxy;
+    this._repository[key] = applyIdentityProperty(factory, key);
   }
 
   public getFactory(key: string): Factory {

src/utils/applyIdentityProperty.ts

@@ -0,0 +1,34 @@
+// eslint-disable-next-line
+type Function<K> = (...args: any[]) => K;
+type IdentityFlavored<K> = K & { __ident?: string };
+
+export function applyIdentityProperty<K extends object, T extends Function<K>>(target: T, identity: string): T {
+  return new Proxy(
+    target,
+    {
+      apply(func: T, _this: unknown, args: Parameters<T>): IdentityFlavored<K> | undefined {
+        const t: IdentityFlavored<K> = func(...args);
+
+        if (typeof t === 'undefined') {
+          return;
+        }
+
+        if (!(t instanceof Object)) {
+          return t;
+        }
+
+        if (typeof t.__ident !== 'undefined') {
+          return t;
+        }
+
+        Object.defineProperty(t, '__ident', {
+          enumerable: false,
+          writable: false,
+          value: identity,
+        });
+
+        return t;
+      },
+    },
+  );
+}