Testing overview

- [Instructor] Another essential part…of your process should be testing.…Testing ensures that your code behaves…the way it's supposed to,…and that we didn't break one thing…while fixing another or adding a new feature.…There are many types of tests.…Unit tests, regression tests,…acceptance tests, functional tests,…stress tests, fahzers, and many other.…You don't have to be a testing expert.…Pick the areas in your code you think are most important…and test them.…Tests also have a downside.…It takes time to write them,…and every time we change our code,…we also need to change some tests.…

We say that tests add mass to the code…and make changes more difficult.…I say that testing is a balancing act…between pain and gain.…The pain is how many tests you write.…The gain is the cost of an error in your code.…If we're writing an internal app for a company bugs,…as unpleasant as they are, are not that critical…and are easier to fix.…However, if we're writing software…that peoples' lives depend on it,…a software that will run on a device on Mars,…