From 04ebef5e7396c9ee2173d2acf52ff3ddea5b1fae Mon Sep 17 00:00:00 2001
From: Nicolas DUBIEN <github@dubien.org>
Date: Wed, 20 Feb 2019 18:02:52 +0100
Subject: [PATCH] Add an additonal test for deeper keys

---
 packages/expect/src/__tests__/matchers.test.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/expect/src/__tests__/matchers.test.js b/packages/expect/src/__tests__/matchers.test.js
index ad70c847e934..b57c29447d9b 100644
--- a/packages/expect/src/__tests__/matchers.test.js
+++ b/packages/expect/src/__tests__/matchers.test.js
@@ -285,6 +285,10 @@ describe('.toStrictEqual()', () => {
     expect([{a: undefined}]).not.toStrictEqual([{}]);
   });
 
+  it('does not ignore keys with undefined values deep inside an object', () => {
+    expect([{a: [{a: undefined}]}]).not.toStrictEqual([{a: [{}]}]);
+  });
+
   it('passes when comparing same type', () => {
     expect({
       test: new TestClassA(1, 2),