Add back a test.

mbta · Dec 19, 2024 · 943d97e · 943d97e
1 parent e94b13d
commit 943d97e
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/apps/api_web/test/api_web/canary_test.exs b/apps/api_web/test/api_web/canary_test.exs
@@ -36,4 +36,13 @@ defmodule ApiWeb.CanaryTest do
 
     assert_receive {:EXIT, ^pid, :normal}
   end
+
+  test "stops with reason if given a value that is not a function for notify_fn" do
+    Process.flag(:trap_exit, true)
+
+    assert {:error, "expect function/0 for notify_fn, got nil"} =
+             Canary.start_link(notify_fn: nil)
+
+    assert_receive {:EXIT, _, "expect function/0 for notify_fn, got nil"}
+  end
 end