Function testDuplicate

packages/zone.js/test/browser/browser.spec.ts:1170–1193

(args1?: any, args2?: any)

          });

          const testDuplicate = function (args1?: any, args2?: any) {
            zone.run(function () {
              if (args1) {
                (document as any).addEventListener('click', docListener, args1);
              } else {
                (document as any).addEventListener('click', docListener);
              }
              if (args2) {
                (document as any).addEventListener('click', docListener, args2);
              } else {
                (document as any).addEventListener('click', docListener);
              }
            });

            button.dispatchEvent(clickEvent);
            expect(hookSpy).toHaveBeenCalled();
            expect(logs).toEqual(['document options']);
            logs = [];

            (document as any).removeEventListener('click', docListener, args1);
            expect(cancelSpy).toHaveBeenCalled();
            button.dispatchEvent(clickEvent);
            expect(logs).toEqual([]);
          };

          it('should ignore duplicate handler', () => {
            let captureFalse = [