No supervisor children when in test env for FarmbotExt.Bootstrap.Supervisor

farmbot_ext/config/test.exs

@@ -2,4 +2,5 @@ use Mix.Config
 
 if Mix.env() == :test do
   config :farmbot_ext, FarmbotExt, children: []
+  config :farmbot_ext, FarmbotExt.Bootstrap.Supervisor, children: []
 end

farmbot_ext/lib/farmbot_ext/api/image_uploader.ex

@@ -16,7 +16,7 @@ defmodule FarmbotExt.API.ImageUploader do
     GenServer.start_link(__MODULE__, args, name: __MODULE__)
   end
 
-  def force_checkup do
+  def force_checkup() do
     GenServer.cast(__MODULE__, :force_checkup)
   end
 

farmbot_ext/lib/farmbot_ext/bootstrap/supervisor.ex

@@ -12,14 +12,17 @@ defmodule FarmbotExt.Bootstrap.Supervisor do
 
   @impl Supervisor
   def init([]) do
-    children = [
+    Supervisor.init(children(), strategy: :one_for_one)
+  end
+
+  def children() do
+    config = Application.get_env(:farmbot_ext, __MODULE__) || []
+    Keyword.get(config, :children, [
       FarmbotExt.API.EagerLoader.Supervisor,
       FarmbotExt.API.DirtyWorker.Supervisor,
       FarmbotExt.AMQP.Supervisor,
       FarmbotExt.API.ImageUploader,
       FarmbotExt.Bootstrap.DropPasswordTask
-    ]
-
-    Supervisor.init(children, strategy: :one_for_one)
+    ])
   end
 end

farmbot_ext/test/farmbot_ext/api/image_uploader_test.exs

@@ -0,0 +1,26 @@
+defmodule FarmbotExt.API.ImageUploaderTest do
+  use ExUnit.Case
+  use Mimic
+  alias FarmbotExt.API.ImageUploader
+  setup :verify_on_exit!
+
+  test "force checkup" do
+    Helpers.NamedProcess.start_link({ImageUploader, "force_checkup_test"})
+    # TODO: Get some single pixel jpg, jpeg, png, gif files.
+    # TODO: Stub `API.upload_image`
+
+    # upload_image_mock = fn _fname ->
+    #   raise "HMMM...."
+    # end
+
+    mapper = fn fname ->
+      File.touch!("/tmp/images/#{fname}")
+    end
+
+    # expect(FarmbotExt.API, :upload_image, 3, upload_image_mock)
+    ["a.jpg", "b.jpeg", "c.png", "d.gif"] |> Enum.map(mapper)
+    ImageUploader.force_checkup()
+    Process.sleep(100)
+    assert_receive :lol
+  end
+end

farmbot_ext/test/test_helper.exs

@@ -31,3 +31,36 @@ defmodule Helpers do
     end
   end
 end
+
+defmodule Helpers.NamedProcess do
+  @moduledoc """
+  NOTE: Inspired by ex_venture test suite. Thanks! -RC
+
+  Register a globaly named process that fakes out a normally real process.
+
+  Any messages this process receives will forward them to the test process via `send`.
+  """
+
+  use GenServer
+
+  @doc """
+  Link a new process to the test process
+
+  This takes place outside of the supervision tree, so the process does
+  not hang around.
+  """
+  def start_link(name) do
+    GenServer.start_link(__MODULE__, [caller: self(), name: name], [name: {:global, name}])
+  end
+
+  @impl true
+  def init(state) do
+    {:ok, Enum.into(state, %{})}
+  end
+
+  @impl true
+  def handle_cast(message, state) do
+    send(state.caller, {state.name, {:cast, message}})
+    {:noreply, state}
+  end
+end