From 2fe756be9e5e189e8c18d08de1ae0bcf3cfaab18 Mon Sep 17 00:00:00 2001
From: Niklas von Hertzen <niklasvh@gmail.com>
Date: Mon, 12 Jul 2021 17:34:41 +0800
Subject: [PATCH] test: unhandled promise rejections

---
 tests/testrunner.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/testrunner.ts b/tests/testrunner.ts
index beefec2..8089c3e 100644
--- a/tests/testrunner.ts
+++ b/tests/testrunner.ts
@@ -86,6 +86,10 @@ testList
                     throw new Error('Window not found for iframe');
                 }
 
+                contentWindow.addEventListener('unhandledrejection', (event) => {
+                    throw new Error(`unhandledrejection: ${event.reason}`);
+                });
+
                 const canvas: HTMLCanvasElement = await contentWindow
                     // @ts-ignore
                     .html2canvas(contentWindow.forceElement || contentWindow.document.documentElement, {