B Getting: Add default implementation, delegate, prepare test support.

config/test.exs

@@ -141,6 +141,8 @@ config :pleroma, Pleroma.Search.Meilisearch, url: "http://127.0.0.1:7700/", priv
 # https://dashbit.co/blog/speeding-up-re-compilation-of-elixir-projects
 config :phoenix, :plug_init_mode, :runtime
 
+config :pleroma, :config_impl, Pleroma.UnstubbedConfigMock
+
 if File.exists?("./config/test.secret.exs") do
   import_config "test.secret.exs"
 else

lib/pleroma/config/getting.ex

@@ -5,4 +5,11 @@
 defmodule Pleroma.Config.Getting do
   @callback get(any()) :: any()
   @callback get(any(), any()) :: any()
+
+  def get(key), do: get(key, nil)
+  def get(key, default), do: impl().get(key, default)
+
+  def impl() do
+    Application.get_env(:pleroma, :config_impl, Pleroma.Config)
+  end
 end

test/support/mocks.ex

@@ -26,5 +26,6 @@ Mox.defmock(Pleroma.Web.ActivityPub.SideEffectsMock,
 Mox.defmock(Pleroma.Web.FederatorMock, for: Pleroma.Web.Federator.Publishing)
 
 Mox.defmock(Pleroma.ConfigMock, for: Pleroma.Config.Getting)
+Mox.defmock(Pleroma.UnstubbedConfigMock, for: Pleroma.Config.Getting)
 
 Mox.defmock(Pleroma.LoggerMock, for: Pleroma.Logging)