public void ConfigureRouting_ConfiguresOptionsProperly()
{
// Arrange
var services = new ServiceCollection().AddOptions();
// Act
services.ConfigureRouting(options => options.ConstraintMap.Add("foo", typeof(TestRouteConstraint)));
var serviceProvider = services.BuildServiceProvider();
// Assert
var accessor = serviceProvider.GetRequiredService<IOptions<RouteOptions>>();
Assert.Equal("TestRouteConstraint", accessor.Options.ConstraintMap["foo"].Name);
}