chapter-organizer/Tests/Entities/Student_Tests.cs

using Tests.Builders;

namespace Tests.Entities;

[TestFixture]
public class Student_Tests
{
    [Test]
    public void DisplayFirstName_FallsBackToFirstName()
    {
        var student = StudentBuilder.Create("Josiah", "Brown").Build();

        Assert.That(student.DisplayFirstName, Is.EqualTo("Josiah"));
        Assert.That(student.ToString(), Is.EqualTo("Josiah"));
    }

    [Test]
    public void DisplayFirstName_UsesTrimmedNickname()
    {
        var student = StudentBuilder.Create("Josiah", "Brown").WithNickname("  Jo  ").Build();

        Assert.That(student.DisplayFirstName, Is.EqualTo("Jo"));
        Assert.That(student.ToString(), Is.EqualTo("Jo"));
    }

    [Test]
    public void LegalNameProperties_IgnoreNickname()
    {
        var student = StudentBuilder.Create("Josiah", "Brown").WithNickname("Jo").Build();

        Assert.That(student.FirstName, Is.EqualTo("Josiah"));
        Assert.That(student.LastName, Is.EqualTo("Brown"));
        Assert.That(student.Name, Is.EqualTo("Josiah Brown"));
        Assert.That(student.FirstNameLastName, Is.EqualTo("Josiah Brown"));
        Assert.That(student.LastNameFirstName, Is.EqualTo("Brown, Josiah"));
    }

    [Test]
    public void DisplayFirstName_TreatsWhitespaceAsUnset()
    {
        var student = StudentBuilder.Create("Josiah", "Brown").WithNickname("   ").Build();

        Assert.That(student.DisplayFirstName, Is.EqualTo("Josiah"));
    }

    [Test]
    public void NormalizeNickname_ClearsBlankAndTrims()
    {
        var blank = StudentBuilder.Create("Josiah", "Brown").WithNickname("  ").Build();
        blank.NormalizeNickname();
        Assert.That(blank.Nickname, Is.Null);

        var nick = StudentBuilder.Create("Josiah", "Brown").WithNickname("  Jo  ").Build();
        nick.NormalizeNickname();
        Assert.That(nick.Nickname, Is.EqualTo("Jo"));
    }
}