Function triggerMouseMove

tensorboard/webapp/core/views/layout_test.ts:160–171

(
      fixture: ComponentFixture<TestableComponent>,
      clientX: number,
      buttons = MouseEventButtons.LEFT
    )

  describe('interactions', () => {
    function triggerMouseMove(
      fixture: ComponentFixture<TestableComponent>,
      clientX: number,
      buttons = MouseEventButtons.LEFT
    ) {
      fixture.debugElement.query(byCss.LAYOUT).nativeElement.dispatchEvent(
        new MouseEvent('mousemove', {
          buttons,
          clientX,
        })
      );
    }

    function triggerMouseUp(fixture: ComponentFixture<TestableComponent>) {
      fixture.debugElement