feat(server): host channel with token auth and metric events

server/test/support/channel_case.ex

@@ -0,0 +1,24 @@
+defmodule ServerWeb.ChannelCase do
+  @moduledoc """
+  Test helpers for Phoenix Channels.
+
+  Imports conveniences for testing channels and the sandbox-based Repo so tests
+  run concurrently and are isolated.
+  """
+
+  use ExUnit.CaseTemplate
+
+  using do
+    quote do
+      import Phoenix.ChannelTest
+      import ServerWeb.ChannelCase
+
+      @endpoint ServerWeb.Endpoint
+    end
+  end
+
+  setup tags do
+    Server.DataCase.setup_sandbox(tags)
+    :ok
+  end
+end