defmodule Memex.DataCase do @moduledoc """ This module defines the setup for tests requiring access to the application's data layer. You may define functions here to be used as helpers in your tests. Finally, if the test case interacts with the database, we enable the SQL sandbox, so changes done to the database are reverted at the end of every test. If you are using PostgreSQL, you can even run database tests asynchronously by setting `use Memex.DataCase, async: true`, although this option is not recommended for other databases. """ use ExUnit.CaseTemplate alias Ecto.Adapters.SQL.Sandbox using do quote do alias Memex.Repo import Ecto import Ecto.{Changeset, Query} import Memex.{DataCase, Fixtures} end end setup tags do pid = Sandbox.start_owner!(Memex.Repo, shared: not tags[:async]) on_exit(fn -> Sandbox.stop_owner(pid) end) :ok end @doc """ A helper that transforms changeset errors into a map of messages. assert {:error, changeset} = Accounts.create_user(%{password: "short"}) assert "password is too short" in errors_on(changeset).password assert %{password: ["password is too short"]} = errors_on(changeset) """ def errors_on(changeset) do Ecto.Changeset.traverse_errors(changeset, fn {message, opts} -> Regex.replace(~r"%{(\w+)}", message, fn _capture, key -> opts |> Keyword.get(String.to_existing_atom(key), key) |> to_string() end) end) end @doc """ Generates a random string of any length, default of 12 """ @spec random_string(length :: non_neg_integer()) :: String.t() def random_string(length \\ 12) do :crypto.strong_rand_bytes(length) |> Base.url_encode64() |> binary_part(0, length) end def unique_user_email, do: "user#{System.unique_integer()}@example.com" def valid_user_password, do: "hello world!" def random_slug(length \\ 20) do symbols = '0123456789abcdef-' symbol_count = Enum.count(symbols) for _ <- Range.new(1, length), into: "", do: <> end end