Fix delegate default serialization with many args

src/delegate/delegate.spec.ts

@@ -95,6 +95,30 @@ describe('delegate', () => {
  expect(counter).toEqual(2);
  });
 
+ it('should delegate method with same key invocation - default key serialization - many args', async () => {
+ let counter = 0;
+
+ class T {
+ @delegate()
+ async foo(...args: number[]): Promise<number> {
+ counter += 1;
+ await sleep(20);
+
+ return Promise.resolve(args.reduce((a, b) => a + b));
+ }
+ }
+
+ const t = new T();
+
+ const res = await Promise.all([
+ t.foo(1, 1, 1, 1),
+ t.foo(1, 1, 1, 2),
+ t.foo(1, 1, 1, 1),
+ ]);
+ expect(res).toEqual([4, 5, 4]);
+ expect(counter).toEqual(2);
+ });
+
  it('should delegate method with same key invocation - custom serialization', async () => {
  let counter = 0;
 

src/delegate/delegatify.ts

@@ -5,7 +5,7 @@ export function delegatify<D = any, A extends any[] = any[]>(
  keyResolver?: (...args: A) => string,
 ): AsyncMethod<D, A> {
  const delegatedKeysMap = new Map<string, Promise<any>>();
- const keyGenerator: (...args: any[]) => string = keyResolver ?? JSON.stringify;
+ const keyGenerator: (...args: any[]) => string = keyResolver ?? ((...args) => JSON.stringify(args));
 
  return function (...args: A): Promise<D> {
  const key = keyGenerator(...args);