Testing the code we are writing is crucial in the job. Even though there are teams that doesn't do tests at all, this is one of the most important ...
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That's exactly what I'm thinking when I code. Everything should work or fail as expected.
When I make big reports I test a lot, specially with dates and SQL and verifying groups of records.
One of our task it's try to predict when something could fail. With experience you become better at it. Since I work with a programmer team I want to know more about testing automation and QA