From 1d19d6197049cc50080e25089493c29e0d721d43 Mon Sep 17 00:00:00 2001
From: Alex Rickabaugh <alx+alxhub@alxandria.net>
Date: Fri, 3 Nov 2017 11:11:47 -0700
Subject: [PATCH] fix(platform-browser): support Symbols in custom
 jasmineToString() method (#19794)

It's illegal to coerce a Symbol to a string, and results in a TypeError:

TypeError: Cannot convert a Symbol value to a string

Previously, the custom jasmineToString() method monkey-patched onto Maps
in platform-browser/testing/src/matchers.ts would coerce keys and values
to strings. A change in a newer version of Jasmine calls this method more
often, resulting in calls against Maps which contain Symbols in some
applications, which causes crashes.

The fix is to explicitly convert keys and values to strings, which does
work on Symbols.
---
 packages/platform-browser/testing/src/matchers.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/platform-browser/testing/src/matchers.ts b/packages/platform-browser/testing/src/matchers.ts
index f43fe4e051..01417f570b 100644
--- a/packages/platform-browser/testing/src/matchers.ts
+++ b/packages/platform-browser/testing/src/matchers.ts
@@ -107,7 +107,7 @@ export const expect: (actual: any) => NgMatchers = <any>_global.expect;
     return '' + m;
   }
   const res: any[] = [];
-  m.forEach((v: any, k: any) => { res.push(`${k}:${v}`); });
+  m.forEach((v: any, k: any) => { res.push(`${String(k)}:${String(v)}`); });
   return `{ ${res.join(',')} }`;
 };