nunit Getting started with nunit Hello World

Example

[TestFixture]
public class UnitTest1
{
    class Message
    {
        public string Text { get; } = "Hello World";
    }

    [Test]
    public void HelloWorldTest()
    {
        // Act
        var message = new Message();

        // Assert
        Assert.That(message.Text, Is.EqualTo("Hello World"));
    }
}