defmodule BasicSignupWhitelistTest do
  use ExUnit.Case
  doctest BasicSignupWhitelist

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

  test "When not set, not whitelisted" do
    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