From 5dcb7a75498a7326bff312987a65ce02ec880594 Mon Sep 17 00:00:00 2001
From: Richard Hansen <rhansen@rhansen.org>
Date: Mon, 14 Jun 2021 04:22:46 -0400
Subject: [PATCH] tests: Don't attempt to wrap non-functions

---
 src/tests/frontend/runner.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/tests/frontend/runner.js b/src/tests/frontend/runner.js
index cc9d0315f..449c126c5 100644
--- a/src/tests/frontend/runner.js
+++ b/src/tests/frontend/runner.js
@@ -221,6 +221,7 @@ $(() => (async () => {
           // backups might be placeholders, not the actual Mocha functions.
           const backups = {};
           for (const fn of mochaFns) {
+            if (typeof window[fn] !== 'function') continue;
             // Note: Test specs can require other modules, so window[fn] might be a placeholder
             // function, not the actual Mocha function.
             backups[fn] = window[fn];