NameTest.cs

[Trait("Category", nameof(Domain))]
public class NameTest
{
    [Theory]
    [InlineData("Lucas Luís", "Cruz")]
    [InlineData("Erick Oliveira", "")]
    public void Name_ValidName_Valid(string firstName, string lastName)
    {
        Assert.DoesNotThrows(() => new Name(firstName, lastName));
    }

    [Theory]
    [InlineData("")]
    [InlineData(" ")]
    public void Name_InvalidName_Invalid(string firstName)
    {
        Assert.Throws<ArgumentNullException>(() => new Name(firstName));
    }
}