Skip Symbol.toStringTag tests if unsupported

Author: lukechilds

test/common/index.js

@@ -7,6 +7,8 @@ const getOwnPropertyDescriptors = Object.getOwnPropertyDescriptors
 const isBrowser = typeof window !== 'undefined';
 
 const bigIntSupported = typeof BigInt !== 'undefined';
+const symbolSupported = typeof Symbol !== 'undefined';
+const symbolToStringTagSupported = symbolSupported && typeof Symbol.toStringTag !== 'undefined';
 
 const noop = () => {};
 
@@ -234,6 +236,7 @@ module.exports = {
   getOwnPropertyDescriptors,
   isBrowser,
   bigIntSupported,
+  symbolToStringTagSupported,
   mustNotCall,
   mustCall,
   expectWarning,

test/parallel/test-assert-deep.js

@@ -1012,7 +1012,7 @@ assert.throws(
 }
 
 // Verify that extra keys will be tested for when using fake arrays.
-{
+if (common.symbolToStringTagSupported) {
   const a = {
     0: 1,
     1: 1,
@@ -1029,7 +1029,7 @@ assert.throws(
 }
 
 // Verify that changed tags will still check for the error message.
-{
+if (common.symbolToStringTagSupported) {
   const err = new Error('foo');
   err[Symbol.toStringTag] = 'Foobar';
   const err2 = new Error('bar');
@@ -1038,7 +1038,7 @@ assert.throws(
 }
 
 // Check for non-native errors.
-{
+if (common.symbolToStringTagSupported) {
   const source = new Error('abc');
   const err = Object.create(
     Object.getPrototypeOf(source), common.getOwnPropertyDescriptors(source));