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Benjamim Chambule
Benjamim Chambule

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Why write unit tests

What do you tell to someone who keeps asking you "man why do I need to write code to make sure my code is running correctly if I can always debug my code while in the development time?"

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James McPherson

Unit testing is your insurance policy - that (a) what you've written does what you say it should do, and (b) that when you or somebody has to make a change, It Can Be Confirmed That You Haven't Broken Things.

How can you prove that it works if you haven't got a test for it?

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Benjamim Chambule

I totally agree with you. But I know a lot of people who would rather debug during development and/or if something is broken than writing a test. Specially when one is maintaining legacy code which was not built with unit tests in mind.

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James McPherson

That's an opportunity to bring things (and people) in from the cold. It's a mindset shift, but one which makes us better programmers/developers/engineers. That in turn means that we've got a "layer 8" problem - and that's where our person-to-person abilities need to be brought to bare.

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Ben Lovy

Unit testing is automation. Why use your development time to debug something that can be handled automatically for you, much more quickly than you can do it yourself?

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Benjamim Chambule

Yeah! We gain a lot from writing tests, but there are people who can't see any advantage in that! For them it's just a waste of time! They would rather keep adding features than writing tests to make sure their features behave accordingly

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