Hello World!
Once we have both Scala and SBT set up, it is time to revisit our understanding of TDD. What better way to summarize than to write a very mundane "Hello World" Scala application using TDD. Let us take this application requirement as a user story.
Story definition
As a user of the application
Given that I have a publically accessible no argument function named
displaySalutation
When the function is invoked
Then a string with the value Hello World is returned.
Note
Notice the language of the story. This is called the Give-When-Then notation, which is used to specify the behavior of the system. Dan North and Chris Matte, as part of (Behavior-Driven Development (BDD), developed this language. We will discuss this parlance in more detail when ...
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