How to rollback, reset, or drop Ecto test database?

Question

Usually mix.test cleans the test database, but it is not working.

It may be because I was playing around with making a users schema, but didn\

Answer 1

You can set aliases into mix.exs like this

defp aliases do
  [
   "ecto.setup": ["ecto.create", "ecto.migrate", "run priv/repo/seeds.exs"],
   "ecto.reset": ["ecto.drop", "ecto.setup"],
   "test":       ["ecto.create --quiet", "ecto.migrate", "test"]
  ]
end

And you need to run database into sandbox mode.

Your /appdir/test/test_helper.exs should be like this

Ecto.Adapters.SQL.Sandbox.mode(ProjectName.DB.Repo, {:shared, self()})
ExUnit.start(exclude: [:pending])

And /appdir/config/test.exs like this

config :project_name, ProjectName.DB.Repo,
  pool: Ecto.Adapters.SQL.Sandbox,
  database: "database_name_test"