Test Driven Development

You got tests driving your development... test first... then the code that should be tested.

I helps with:

• thinking about the code
• thinking about what is needed
• how can I achieve what is needed...

When are writing tests:

• You are publishing your intent for the code.
• You are stating what the code is doing and how it should behave.

Why do I need to use TDD? - lunga

• It helps you to learn how to write decoupled code.
• Learn how to create code blocks that can be used together to create more maintainable software.
• Help us not to be afraid to make changes in our codebase.
• It's a way of understanding other people's (you 4 weeks ago) thoughts about the code.

How does TDD make my code better? - lihle

• It decouples your code - it drives the seperation of concerns.
• It drives the architecture / structure of your codebase...
  • How the various pieces of code relate to each other.

How does it help me? - lunga

What is Mockito? - shawn/minenhle

• It helps us to create mocks of interfaces - a thing that is not the actual thing. It looks like the actual thing...
• It can create a 'silent' mock - it doesn't fail but doesn't do much.
• You can add selected behaviour using when
• You can verify that that Mock was used correctly using verify

How does one know if a class is not testable? - bheki

• I can't write a test for it:
  • I can't check the result of an action
  • I can't verify if something happened that should have happened
  • The logic is too intertwined...

How does one know if a class is testable? - bheki

How do I unit test my classes? - lihle

Is there and alternative to unit testing to improve our code? - bheki

How would I write a test for code that doesn't exist yet? - lunga

How do I unit test my classes that is using the database? - phumlani

Can you unit test without hard coding an expected a result? - minenhle

How do I unit test my commands?

assertEquals("Hello, Andre", commandProc.execute("greet Andre English"));
assertEquals("Hello, Andre", commandProc.execute("greet Andre"));

How do I prepare the data in my database so that the unit test will work correctly as it depends on some existing data in the database? - shawn