From aea509c2305064a994febc71b6540ac5561795e6 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Sun, 9 Oct 2016 22:25:33 -0700
Subject: [PATCH] Add `Symbol.toStringTag` test for `_.isPlainObject`.

---
 test/test.js | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/test/test.js b/test/test.js
index 631493287..c66a0eee5 100644
--- a/test/test.js
+++ b/test/test.js
@@ -11360,7 +11360,21 @@
       assert.strictEqual(_.isPlainObject(object), true);
     });
 
-    QUnit.test('should return `true` for plain objects with a custom `valueOf` property', function(assert) {
+    QUnit.test('should return `true` for objects with a `Symbol.toStringTag` property', function(assert) {
+      assert.expect(1);
+
+      if (Symbol && Symbol.toStringTag) {
+        var object = {};
+        object[Symbol.toStringTag] = 'X';
+
+        assert.deepEqual(_.isPlainObject(object), true);
+      }
+      else {
+        skipAssert(assert);
+      }
+    });
+
+    QUnit.test('should return `true` for objects with a `valueOf` property', function(assert) {
       assert.expect(2);
 
       assert.strictEqual(_.isPlainObject({ 'valueOf': 0 }), true);