From 361ce5c00bd39942a7417dd635503e59e058267b Mon Sep 17 00:00:00 2001
From: Ben Alpert <ben@benalpert.com>
Date: Thu, 1 Dec 2016 14:19:00 -0800
Subject: [PATCH] Add test for unmount/remount in a single batch (#8470)

Fails in Fiber.
---
 scripts/fiber/tests-failing.txt                        |  1 +
 .../shared/shared/__tests__/ReactUpdates-test.js       | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/scripts/fiber/tests-failing.txt b/scripts/fiber/tests-failing.txt
index b397e754bec48..0aba62db6feb1 100644
--- a/scripts/fiber/tests-failing.txt
+++ b/scripts/fiber/tests-failing.txt
@@ -115,6 +115,7 @@ src/renderers/shared/shared/__tests__/ReactUpdates-test.js
 * throws in setState if the update callback is not a function
 * throws in replaceState if the update callback is not a function
 * throws in forceUpdate if the update callback is not a function
+* unmounts and remounts a root in the same batch
 
 src/renderers/shared/shared/__tests__/refs-test.js
 * Should increase refs with an increase in divs
diff --git a/src/renderers/shared/shared/__tests__/ReactUpdates-test.js b/src/renderers/shared/shared/__tests__/ReactUpdates-test.js
index 97f72a2e2a087..a430c1923c2a1 100644
--- a/src/renderers/shared/shared/__tests__/ReactUpdates-test.js
+++ b/src/renderers/shared/shared/__tests__/ReactUpdates-test.js
@@ -1081,4 +1081,14 @@ describe('ReactUpdates', () => {
     });
     expect(result).toEqual(42);
   });
+
+  it('unmounts and remounts a root in the same batch', () => {
+    var container = document.createElement('div');
+    ReactDOM.render(<span>a</span>, container);
+    ReactDOM.unstable_batchedUpdates(function() {
+      ReactDOM.unmountComponentAtNode(container);
+      ReactDOM.render(<span>b</span>, container);
+    });
+    expect(container.textContent).toBe('b');
+  });
 });