Fix test failing because of concurrent compilation (#3031)

Author: jonatanklosko

config/test.exs

@@ -32,15 +32,8 @@ config :livebook,
   check_completion_data_interval: 300,
   iframe_port: 4003
 
-data_path = Path.expand("tmp/livebook_data/test")
-
-# Clear data path for tests
-if File.exists?(data_path) do
-  File.rm_rf!(data_path)
-end
-
 config :livebook,
-  data_path: data_path,
+  data_path: Path.expand("tmp/livebook_data/test"),
   agent_name: "chonky-cat",
   k8s_kubeconfig_pipeline:
     {Kubereq.Kubeconfig.Stub,

lib/livebook/application.ex

@@ -4,6 +4,8 @@ defmodule Livebook.Application do
   require Logger
 
   def start(_type, _args) do
+    setup_tests()
+
     Logger.add_handlers(:livebook)
     Livebook.ZTA.init()
     create_teams_hub = parse_teams_hub()
@@ -432,4 +434,16 @@ defmodule Livebook.Application do
   defp serverless?() do
     Application.get_env(:livebook, :serverless, false)
   end
+
+  if Mix.env() == :test do
+    defp setup_tests() do
+      data_path = Livebook.Config.data_path()
+      # Clear data path for tests
+      if File.exists?(data_path) do
+        File.rm_rf!(data_path)
+      end
+    end
+  else
+    defp setup_tets(), do: :ok
+  end
 end