Cast timestamp to utc_datetime in testing queries

Timestamps with a timezone are now cast to `:utc_datetime` via a
changeset before running `Oban.Testing` queries. This fixes a regression
introduced in f8e5785.

Closes #977

lib/oban/testing.ex

@@ -610,13 +610,12 @@ defmodule Oban.Testing do
  defp conditions({key, val}, query) when key in @timestamp_fields do
  {time, delta} =
  case val do
- {time, delta: delta} ->
- {time, delta}
-
- time ->
- {time, 1}
+ {time, delta: delta} -> {time, delta}
+ time -> {time, 1}
  end
 
+ {:ok, time} = Ecto.Type.cast(:utc_datetime, time)
+
  begin = DateTime.add(time, -delta, :second)
  until = DateTime.add(time, +delta, :second)
 

test/oban/testing_test.exs

@@ -264,6 +264,7 @@ defmodule Oban.TestingTest do
  insert!(%{}, worker: Pong, scheduled_at: seconds_from_now(60))
 
  assert_enqueued worker: Ping, state: "available", scheduled_at: DateTime.utc_now()
+ assert_enqueued worker: Ping, scheduled_at: DateTime.now!("America/Chicago")
  assert_enqueued worker: Pong, scheduled_at: seconds_from_now(60)
  assert_enqueued worker: Pong, scheduled_at: {seconds_from_now(69), delta: 10}
  end