How can I unit test a GUI?

Question

The calculations in my code are well-tested, but because there is so much GUI code, my overall code coverage is lower than I\'d like. Are there any guidelines on unit-testin

Answer 1

Testing is an art form. I agree the logic should be removed GUI as much as possible. We can then focus our unit testing there. Like anything else testing is about reducing risk. You dont always need to test everything but alot of times the best thing is to break the different testing up for at different areas.

The other question is what are you really trying to test at the UI layer. UI testing is the most expensive testing because it usually takes longer to create, maintain and it is the most brittle. If you test the logic to know the coordinates are correct prior to trying to draw the line what are you testing specifically? If you want to test a graph with a red line is drawn. Can you give it a set predetermined coordinates and test if certain pixels are red or not red? As suggested above bitmap comparisons work, Selenium but my main focus would be not to over test the GUI but rather test the logic that will help create the UI and then focus on what portion of the UI breaks or is suspect and focus a handful of tests there.