fix(auth): boot AshAuthentication children under the :mv otp_app

test/mv/application_test.exs

@@ -0,0 +1,58 @@
+defmodule Mv.ApplicationTest do
+  @moduledoc """
+  Guards the AshAuthentication supervisor wiring in `Mv.Application`.
+
+  The auth children (token Expunger, audit-log batcher/expunger) resolve their
+  configuration via `Spark.sparks(otp_app, Ash.Resource)`. With the wrong
+  `otp_app` they silently start against an empty resource set: the token
+  Expunger then runs against no token resources and becomes a no-op. This test
+  pins the corrected `:mv` wiring against the *running* application tree: the
+  supervisor and all three children are present, and the token Expunger booted
+  live and resolved the real `:mv` token resource.
+
+  The two audit-log children legitimately report an `:undefined` pid because no
+  `AuditLogResource` resources exist under `:mv` (their init returns `:ignore`);
+  that is a successful start, not a crash, so they are only asserted present.
+  """
+  use ExUnit.Case, async: false
+
+  alias AshAuthentication.TokenResource.Expunger
+
+  test "AshAuthentication children boot under the :mv otp_app and resolve real config" do
+    # Locate the running AshAuthentication.Supervisor inside the live app tree.
+    auth_sup =
+      Mv.Supervisor
+      |> Supervisor.which_children()
+      |> Enum.find_value(fn
+        {AshAuthentication.Supervisor, pid, _type, _mods} when is_pid(pid) -> pid
+        _ -> nil
+      end)
+
+    assert is_pid(auth_sup), "AshAuthentication.Supervisor is not running in Mv.Supervisor"
+
+    children = Supervisor.which_children(auth_sup)
+    child_ids = children |> Enum.map(&elem(&1, 0)) |> Enum.sort()
+
+    # All three auth children are present in the supervision tree.
+    assert child_ids ==
+             Enum.sort([
+               AshAuthentication.TokenResource.Expunger,
+               AshAuthentication.AuditLogResource.Batcher,
+               AshAuthentication.AuditLogResource.Expunger
+             ])
+
+    # The token Expunger booted as a live process and resolved the real :mv
+    # token resource — proving the children run against non-empty :mv config
+    # rather than the empty set the wrong otp_app produced.
+    expunger_pid =
+      Enum.find_value(children, fn
+        {Expunger, pid, _, _} when is_pid(pid) -> pid
+        _ -> nil
+      end)
+
+    assert is_pid(expunger_pid), "token Expunger did not boot as a live process under :mv"
+    assert Process.alive?(expunger_pid)
+    assert %{otp_app: :mv, resources: resources} = :sys.get_state(expunger_pid)
+    assert Map.has_key?(resources, Mv.Accounts.Token)
+  end
+end