distraction.party/test/web/oauth/token_test.exs

defmodule Pleroma.Web.OAuth.TokenTest do
  use Pleroma.DataCase
  alias Pleroma.Web.OAuth.{App, Token, Authorization}
  alias Pleroma.Repo

  import Pleroma.Factory

  test "exchanges a auth token for an access token" do
    {:ok, app} =
      Repo.insert(
        App.register_changeset(%App{}, %{
          client_name: "client",
          scopes: "scope",
          redirect_uris: "url"
        })
      )

    user = insert(:user)

    {:ok, auth} = Authorization.create_authorization(app, user)

    {:ok, token} = Token.exchange_token(app, auth)

    assert token.app_id == app.id
    assert token.user_id == user.id
    assert String.length(token.token) > 10
    assert String.length(token.refresh_token) > 10

    auth = Repo.get(Authorization, auth.id)
    {:error, "already used"} = Token.exchange_token(app, auth)
  end
end