public void EnsurePathTrailingSlash_Relative()
 {
     RelativeUri
     .Invoking(u => u.EnsurePathTrailingSlash())
     .Should().Throw <ArgumentException>();
 }
 public void ChangeBase_RelativeNewBaseUri()
 {
     RelativeUri
     .Invoking(u => AnyUri.ChangeBase(AnyUri, u))
     .Should().Throw <ArgumentException>();
 }