From 799e1931ecdc4d633a006b140a248a234feb8a7e Mon Sep 17 00:00:00 2001
From: Dylan Piercey <dpiercey@ebay.com>
Date: Wed, 20 Oct 2021 20:19:28 -0700
Subject: [PATCH] fix: prevent prettier from breaking typescript

---
 src/mocha.ts | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/mocha.ts b/src/mocha.ts
index 06ec14e..7e1beda 100644
--- a/src/mocha.ts
+++ b/src/mocha.ts
@@ -36,9 +36,11 @@ function snapshot(file: string, contents: string) {
     try {
       assert.equal(contents, expected);
     } catch (err) {
-      err.snapshot = true;
-      err.name = err.name.replace(" [ERR_ASSERTION]", "");
-      err.message = `${path.relative(process.cwd(), file)}\n\n${err.message}`;
+      if (err instanceof Error) {
+        (err as any).snapshot = true;
+        err.name = err.name.replace(" [ERR_ASSERTION]", "");
+        err.message = `${path.relative(process.cwd(), file)}\n\n${err.message}`;
+      }
 
       throw err;
     }