FullNameUnitTest.cs

[Test]
public void FullNameConcatenatesFirstAndLastName()
{
    // Arrange
    Person personUnderTest = new()
    {
        FirstName = "Ned",
        LastName = "Grady",
        Email = "Ned.Grady@nedgrady.co.uk"
    };

    // Act
    var fullName = personUnderTest.FullName;

    // Assert
    Assert.AreEqual("Ned Grady", fullName);
}