Disallow duplicate registration

Author: parzhitsky

packages/v1/src/di/context.ts

@@ -25,10 +25,12 @@ export class Context {
   registerConstructor(Entity: ConstructorUnknown): this {
     this.logger.log(`Registering "${Entity.name}" …`)
 
-    if (!this.registry.hasCreator(Entity)) {
-      this.registry.addCreator(Entity, async (...dependencies) => new Entity(...dependencies as never))
+    if (this.registry.hasCreator(Entity)) {
+      throw new Error(`Cannot register: "${Entity.name}" is already registered`)
     }
 
+    this.registry.addCreator(Entity, async (...dependencies) => new Entity(...dependencies as never))
+
     return this
   }