ash/test/resource/actions/actions_test.exs

defmodule Ash.Test.Dsl.Resource.Actions.ActionsTest do
  @moduledoc false
  use ExUnit.Case, async: true

  defmacrop defposts(do: body) do
    quote do
      # Process.flag(:trap_exit, true)

      defmodule Post do
        @moduledoc false
        use Ash.Resource

        attributes do
          attribute :id, :uuid, primary_key?: true, default: &Ecto.UUID.generate/0
        end

        unquote(body)
      end
    end
  end

  describe "validations" do
    test "raises if you have multiple primary actions for a type" do
      assert_raise(
        Ash.Error.Dsl.DslError,
        "actions -> create:\n  Multiple actions of type create configured as `primary?: true`, but only one action per type can be the primary",
        fn ->
          defposts do
            actions do
              create :default, primary?: true
              create :special, primary?: true
            end
          end
        end
      )
    end

    test "raises if you have multiple actions for a type, but none are primary" do
      assert_raise(
        Ash.Error.Dsl.DslError,
        "actions -> create:\n  Multiple actions of type create defined, one must be designated as `primary?: true`",
        fn ->
          defposts do
            actions do
              create :default
              create :special
            end
          end
        end
      )
    end
  end
end