Function once

src/test/testlib.ts:38–47

(func: T)

}

function once<T extends Function>(func: T): T {
  let run = false;
  let ret: any = undefined;
  return function (...args: any[]) {
    if (run) return ret;
    run = true;
    ret = func(...args);
    return ret;
  } as any as T;
}

export const test = createTestInterface({
  beforeEachFunctions: [],