@s-libs/ng-dev
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    Class AsyncMethodController<WrappingObject, FunctionName>

    Controller to be used in tests, that allows for mocking and flushing any asynchronous function. For example, to mock the browser's paste functionality:

     it('can paste', () => {
      const clipboard = navigator.clipboard;
      const ctx = new AngularContext();

      // mock the browser API for pasting
      const controller = new AsyncMethodController(clipboard, 'readText');
      ctx.run(() => {
        // BEGIN production code that copies to the clipboard
        let pastedText: string;
        clipboard.readText().then((text) => {
          pastedText = text;
        });
        // END production code that copies to the clipboard

        controller.expectOne([]).flush('mock clipboard contents');

        // BEGIN expect the correct results after a successful copy
        expect(pastedText!).toBe('mock clipboard contents');
        // END expect the correct results after a successful copy
      });
    });

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