Episode 25: Unit Testing

Download

News

• MineCraft on Raspberry Pi
• http://www.theverge.com/2013/2/11/3978184/minecraft-raspberry-pi-edition-available
• Flat pixels
• http://sachagreif.com/flat-pixels/
• Oculus Rift
• http://www.oculusvr.com/

Tool of the Show

• Jason: JsFiddle http://jsfiddle.net/
• Patrick: telnet towel.blinkenlights.nl

Book of the Show

• Jason: The Lean Startup (Kindle: http://amzn.to/157xbEl ), (Hardcover: http://amzn.to/12HwaDp)
• Patrick: Ender’s Game (Kindle: http://amzn.to/VcfVtD), (Paperback: http://amzn.to/Wg32hx)

Unit Testing

History

• 1956 “The Debugging Period”
• Testing associated with debugging
• 1957 - 1978 “Demonstration Period”
• Show software satisfies requirements
• 1979 - 1982 “Destruction Oriented Period”
• Testing should find errors
• 1983 - 1987 “Evaluation Oriented Period”
• Testing to measure quality
• 1988+ “Prevention-Oriented”
• Detect and prevent faults

Features

• Prove correctness
• Mocking
• Code Coverage (Statement  and branch)

Strengths

• Establish a contract for the code
• Make sure there is no unreachable code
• Force writing testable code
• Can serve as programmatic documentation

Weaknesses

• Time consuming
• Establish constraints that may not be valid
• False sense of security

Tools

• Java
• JUnit
• EasyMock, Mockito
• C++
• cpptest
• gmock