Beatiful tests

Beautiful TestsTests that are beautiful for their simplicity

Monday, October 21, 13

Binary Search


The bug:

int mid = (low + high) / 2;

Solution:

int mid = low + ((high - low) / 2);

Show off:

int mid = (low + high) >>> 1;


My initial testing strategy

Start with smoke tests.

Add some boundary value tests

Continue with various thorough and exhaustive types of tests

Finally, add some performance tests


Smoking Allowed (and Encouraged)

These are designed to make sure that the code does the right thing when used in the most basic manner


Smoking Allowed (and Encouraged)

“confidence maintenance”


Pushing the Boundaries

Boundary testing is designed to explore and validate what happens when the code has to deal with extremes and corner cases



very large array ????


Random Acts of Testing

A way to generate a large and diverse set of inputs

A set of generalized assertions that will work on any input


Random Acts of Testing


Performance Anxiety


ConclusionUnit Tests allows you to make big changes to code quickly

Your tests give you confidence that you've done enough for now and can stop tweaking and move on to the next thing

Good unit tests can help document and define what something is supposed to do

Unit Tests help you really understand the design of the code you are working on


Beatiful tests

Technology

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