I’m a bit confused as to how Ecto works with seeded data when it is conducting its tests. What EXACTLY is the flow when you commence a test run (whether it be all of them via “mix test”, or only a specific file, or a specific test by specifying a line number)? Does the testing database get seeded …

mix test won’t seed your database, because nothing will cleanup the data which was inserted outside of the sandbox transactions of single tests. Also having those countries seeded would mean they are the same to all tests, which imho can be as annoying as any other global state in your system. I’d r…

How do you make a factory that would seed the testing database? If I run the seed operation using mix, it will by default get added to my dev database. Thanks!

Interesting… but that generates random data. I’m really needing to seed specific data for some pretty specific tests… especially when some of the end-to-end tests in our architecture are further downstream.

A factory is about making it easy to inserts some data into the database. If it’s random or not is more about what you need. In a simple case it could just be a module, which you wrote, that does add some data to the db.

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Seeding database data for tests

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fireproofsocks June 25, 2018, 7:11pm 7

Thank you, this is helpful – I need some time to digest it.