From b72da4e256f37402f2387663802fbd730a735ddd Mon Sep 17 00:00:00 2001
From: Sebastian Silbermann <silbermann.sebastian@gmail.com>
Date: Mon, 20 Apr 2020 12:49:06 +0200
Subject: [PATCH] test: add similar test that should trigger the warning

---
 .../ReactServerRenderingHydration-test.js     | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/packages/react-dom/src/__tests__/ReactServerRenderingHydration-test.js b/packages/react-dom/src/__tests__/ReactServerRenderingHydration-test.js
index b622598c7d964..419fda91e2696 100644
--- a/packages/react-dom/src/__tests__/ReactServerRenderingHydration-test.js
+++ b/packages/react-dom/src/__tests__/ReactServerRenderingHydration-test.js
@@ -564,4 +564,25 @@ describe('ReactDOMServerHydration', () => {
 
     expect(domElement.innerHTML).toEqual(markup);
   });
+
+  it('should warns if innerHTML mismatches with dangerouslySetInnerHTML=undefined on the client', () => {
+    const domElement = document.createElement('div');
+    const markup = ReactDOMServer.renderToStaticMarkup(
+      <div dangerouslySetInnerHTML={{__html: '<p>server</p>'}} />,
+    );
+    domElement.innerHTML = markup;
+
+    expect(() => {
+      ReactDOM.hydrate(
+        <div dangerouslySetInnerHTML={undefined}>
+          <p>client</p>
+        </div>,
+        domElement,
+      );
+
+      expect(domElement.innerHTML).not.toEqual(markup);
+    }).toErrorDev(
+      'Warning: Text content did not match. Server: "server" Client: "client"',
+    );
+  });
 });