defmodule BasicSignupWhitelistTest do
  use ExUnit.Case, async: false
  doctest BasicSignupWhitelist

  defp allow_signups_for(whitelist) do
    System.put_env("SIGNUP_ALLOWLIST_EMAILS", whitelist)
  end

  describe "setup in describe block" do
    setup do
      on_exit(fn ->
        # resetting values did not work, so 'just' set it to the effect without this module configured.
        System.put_env("SIGNUP_ALLOWLIST_EMAILS", "*")
      end)

      :ok
    end

    test "When not set, not whitelisted" do
      System.delete_env("SIGNUP_ALLOWLIST_EMAILS")
      refute BasicSignupWhitelist.mail_whitelisted("joe@example.com")
    end

    test "When set to star, whitelisted" do
      allow_signups_for("*")
      assert BasicSignupWhitelist.mail_whitelisted("joe@example.com")
    end
  end
end