test-chart-js.callback-calls-routre-method.ts

test-chart-js.callback-calls-routre-method.ts

it('when clicked on the second point should navigate to show the selected point', () => {
  // arrange
  const r = mockRouter();
  // arrange the onclick prerequisites
  const ch = jasmine.createSpy('chart builder');
  let onClickCallback: Function = () => {};
  ch.and.callFake((i, o) => {
    onClickCallback = o.options.onClick;
    return {}; // <-- mock needed chart methods and props here
  });

  const c = new ChartComponent(r, ch);
  c.canvas = new ElementRef(document.createElement('canvas'));
  c.ngAfterViewInit();
  // act
  onClickCallback(null, [{ index: 1 }]);
  // assert
  expect(r.navigate).toHaveBeenCalledWith([2]);
});