DefStructTest - cover all `defstruct` calls on your elixir app

defstruct_test.ex

defmodule MyApp.DefStructTest do
  use ExUnit.Case, async: true

  test "to cover defstruct" do
    project_structs()
    |> Enum.each(&assert &1.__struct__(), to_string(&1))
  end

  defp project_structs do
    {:ok, modules} = :application.get_key(:my_app, :modules) # change to your app's name
    Enum.filter(modules, &function_exported?(&1, :__struct__, 0))
  end
end