public void CanRenderFragmentsWhilePreservingSurroundingElements()
{
// Initially, the region isn't shown
var appElement = MountTestComponent <RenderFragmentToggler>();
var originalButton = appElement.FindElement(By.TagName("button"));
Func <IEnumerable <IWebElement> > fragmentElements = () => appElement.FindElements(By.CssSelector("p[name=fragment-element]"));
Assert.Empty(fragmentElements());
// The JS-side DOM builder handles regions correctly, placing elements
// after the region after the corresponding elements
Assert.Equal("The end", appElement.FindElements(By.CssSelector("div > *:last-child")).Single().Text);
// When we click the button, the region is shown
originalButton.Click();
WaitAssert.Single(fragmentElements);
// The button itself was preserved, so we can click it again and see the effect
originalButton.Click();
WaitAssert.Empty(fragmentElements);
}