November 2002
Intermediate to advanced
240 pages
5h 9m
English
Content preview from Test Driven Development: By Example
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Chapter 28
Green Bar Patterns
Once you have a broken test, you need to fix it. If you treat a red bar as a condition to be fixed as quickly as possible, then you will discover that you can get to green quickly. Use these patterns to make the code pass (even if the result isn’t something you want to live with for even an hour).
Fake It (’Til You Make It)
What is your first implementation once you have a broken test? Return a constant. Once you have the test running, gradually transform the constant into an expression using variables.
A simple example occurred in our implementation of xUnit:
return "1 run, 0 failed"
became:
return "%d run, 0 failed" % self.runCount
became:
return "%d ...