Programming Phoenix

Unit-Testing Plugs

If your code is worth writing, it’s worth testing. Earlier, we bypassed our authentication plug, so we should test it now. The good news is that since our plug is essentially a function, it’s relatively easy to build a set of tests that will confirm that it does what we need.

Create a test/controllers/auth_test.exs and key in the following contents. We’re going to break the test file into parts to keep things simple.

First, test the authenticate_user function that does the lion’s share of the work:

testing_mvc/listings/rumbl/test/controllers/auth_test.exs

defmodule Rumbl.AuthTest do
  use Rumbl.ConnCase
  alias Rumbl.Auth

  test "authenticate_user halts when no current_user exists",
    %{conn: conn} do