Deleting test database in Vapor 3

Have a look at https://github.com/raywenderlich/vapor-til/tree/master/Tests

This requires a DB to be running before you run the tests, but it reverts all migrations at the start of each test run, which gives you a clean DB each time. (Specifically here)

There's also a docker-compose.yml in the root directory for spinning up a completely isolated test environment on Linux