public void Test_When_Calls_Provided_Callback()
{
Func <IRouteBuilder, IRouteBuilder> routeBuilder =
Substitute.For <Func <IRouteBuilder, IRouteBuilder> >();
builder.When(routeBuilder);
routeBuilder.Received(1)(Arg.Any <IRouteBuilder>());
}
public static IRouterBuilder When <TViewModel>(this IRouterBuilder builder) => builder.When(route => route.SetViewModel(typeof(TViewModel)));
public static IRouterBuilder When <TViewModel>(this IRouterBuilder builder,
Func <IRouteBuilder, IRouteBuilder> buildRoute) =>
builder.When(route => buildRoute(route.SetViewModel(typeof(TViewModel))));