From ae9e34b4a665f0ab5d98c58ff4742e7e17320b5e Mon Sep 17 00:00:00 2001
From: Ivan Goncharov <ivan.goncharov.ua@gmail.com>
Date: Thu, 1 Aug 2019 14:14:38 +0300
Subject: [PATCH] inspect: correctly handle custom objects without class name

---
 src/jsutils/__tests__/inspect-test.js | 5 +++++
 src/jsutils/inspect.js                | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/jsutils/__tests__/inspect-test.js b/src/jsutils/__tests__/inspect-test.js
index bd2e5ee0ee9..66b0609b58f 100644
--- a/src/jsutils/__tests__/inspect-test.js
+++ b/src/jsutils/__tests__/inspect-test.js
@@ -177,5 +177,10 @@ describe('inspect', () => {
 
     (Foo.prototype: any)[Symbol.toStringTag] = 'Bar';
     expect(inspect([[new Foo()]])).to.equal('[[[Bar]]]');
+
+    const objectWithoutClassName = new (function() {
+      this.foo = 1;
+    })();
+    expect(inspect([[objectWithoutClassName]])).to.equal('[[[Object]]]');
   });
 });
diff --git a/src/jsutils/inspect.js b/src/jsutils/inspect.js
index 0e444898a91..49e0d8babc3 100644
--- a/src/jsutils/inspect.js
+++ b/src/jsutils/inspect.js
@@ -117,7 +117,7 @@ function getObjectTag(object) {
 
   if (tag === 'Object' && typeof object.constructor === 'function') {
     const name = object.constructor.name;
-    if (typeof name === 'string') {
+    if (typeof name === 'string' && name !== '') {
       return name;
     }
   }