test-chart-js.calling-chart-method-from-event-handler.ts

it('when clicked on the second point should NOT navigate to show the selected point if it is NOT visible', () => {
  // 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 the isVisible method
      getDataVisibility: jasmine
        .createSpy('isVisibleMockMethod')
        .and.returnValue(false),
    };
  });

  const c = new ChartComponent(r, ch);
  c.canvas = new ElementRef(document.createElement('canvas'));
  c.ngAfterViewInit();
  // act
  onClickCallback(null, [{ index: 1 }]);
  // assert
  expect(r.navigate).not.toHaveBeenCalledWith([2]);
});