Refactor test runtime ownership

test/support/runtime.ex

@@ -0,0 +1,34 @@
+defmodule Parrhesia.TestSupport.Runtime do
+  @moduledoc false
+
+  @required_processes [
+    Parrhesia.Supervisor,
+    Parrhesia.Config,
+    Parrhesia.Repo,
+    Parrhesia.Subscriptions.Supervisor,
+    Parrhesia.Web.Endpoint
+  ]
+
+  def ensure_started! do
+    if healthy?() do
+      :ok
+    else
+      restart!()
+    end
+  end
+
+  defp healthy? do
+    Enum.all?(@required_processes, &is_pid(Process.whereis(&1)))
+  end
+
+  defp restart! do
+    case Application.stop(:parrhesia) do
+      :ok -> :ok
+      {:error, {:not_started, :parrhesia}} -> :ok
+      {:error, {:not_started, _app}} -> :ok
+    end
+
+    {:ok, _apps} = Application.ensure_all_started(:parrhesia)
+    :ok
+  end
+end