Finglas

public void Publish()
{
    // Code
    DomainEvents.Publish(new PostPublishedEvent(postId, authorId));
}

Finglas

public void Publish(AuthorService authorService, TwitterService twitterService)
{
    // Code
}

Finglas

class Post
{
    public void Publish(AuthorService authorService)
    {
        // Code
    }
}

Finglas

// Bad example
blogPost.Publish("Example", "2016-10-26", "Shaun Finglas");

// Better example
blogPost.Publish(title: "Example", date: "2016-10-26", author: "Shaun Finglas");

Finglas

// Bad example, uses dependency directly
public void Publish()
{
    this.twitterFeed.SendTweet(...);
}
 
// Better example
public void Publish()
{
    this.PostPublished();

Finglas

// Bad use of constant if this was separated.
File.Open(FilePath);

// Local constant. More clarity.
const string FilePath = "...";
File.Open(FilePath);

// Inline, named argument for cases where you want
// readability but also the ability to change at runtime
// or on deployment.

Finglas

class Constants
{
    public const int DaysInWeek = 7;

    public const string DefaultDrive = "D";

    public const string WelcomeText = "Hello";

    ...
}

Finglas

[TestFixture]
public class Given_A_Blog_Post_With_No_Comments
{
    [SetUp]
    public void When_Adding_A_New_Comment()
    {
    }

    [Test]
    public void Then_A_New_Comment_Notification_Is_Issued()

Finglas

[TestFixture]
public class BlogPostRetrievalTests
{
    [Test]
    public void Retrieving_No_Posts()
    {
    }

    [Test]
    public void Retrieving_A_Single_Post()

Finglas

public class BlogPostNotFoundException : Exception
{
    public BlogPostNotFoundException(string message) 
        : base(message)
    {
    }
    
    // Note some suggested overloads have been omitted.
}