Where is using statement in phoenix doc?

Hi all

Consider following code snippet from ConnCase:

defmodule Rumbl.ConnCase do
  @moduledoc """
  This module defines the test case to be used by
  tests that require setting up a connection.

  Such tests rely on `Phoenix.ConnTest` and also
  import other functionality to make it easier
  to build and query models.

  Finally, if the test case interacts with the database,
  it cannot be async. For this reason, every test runs
  inside a transaction which is reset at the beginning
  of the test unless the test case is marked as async.

  use ExUnit.CaseTemplate

  using do
    quote do
      # Import conveniences for testing with connections
      use Phoenix.ConnTest

      alias Rumbl.Repo
      import Ecto
      import Ecto.Changeset
      import Ecto.Query

      import Rumbl.Router.Helpers
      import Rumbl.TestHelpers

      # The default endpoint for testing
      @endpoint Rumbl.Endpoint

  setup tags do
    :ok = Ecto.Adapters.SQL.Sandbox.checkout(Rumbl.Repo)

    unless tags[:async] do
      Ecto.Adapters.SQL.Sandbox.mode(Rumbl.Repo, {:shared, self()})

    {:ok, conn: Phoenix.ConnTest.build_conn()}

The using macro will expand to defmacro __using__(_opts)? Is it Phoenix DSL?


The only thing that is done before using the using-macro is the line use ExUnit.CaseTemplate, so we look up the documentation of exactly that module, which does provide a macro using/2.

1 Like

Thanks so much @NobbZ