public void ItShouldBuildAUri(FluentUriBuilder builder, string expected)
{
if (builder == null)
{
throw new ArgumentNullException(nameof(builder));
}
builder.ToString().Should().Be(expected);
((Uri)builder).Should().Be(new Uri(expected, UriKind.Relative));
builder.ToUri(new Uri("https://example.org/")).Should().Be(new Uri(new Uri("https://example.org/"), expected));
}