defmodule Mv.Membership.Import.ImportRunnerTest do
  use ExUnit.Case, async: true

  alias Mv.Membership.Import.ImportRunner

  describe "read_file_entry/2" do
    test "returns {:ok, content} for a readable file" do
      path =
        Path.join(
          System.tmp_dir!(),
          "import_runner_read_#{System.unique_integer([:positive])}.csv"
        )

      File.write!(path, "email;first_name\njohn@example.com;John")
      on_exit(fn -> File.rm_rf(path) end)

      assert {:ok, "email;first_name\njohn@example.com;John"} =
               ImportRunner.read_file_entry(%{path: path}, %{})
    end

    test "returns {:error, message} with a binary message when the file cannot be read" do
      missing_path =
        Path.join(
          System.tmp_dir!(),
          "import_runner_missing_#{System.unique_integer([:positive])}.csv"
        )

      assert {:error, message} = ImportRunner.read_file_entry(%{path: missing_path}, %{})
      assert is_binary(message)
      assert message != ""
    end
  end
end