From f76bc53fb7236bd218037b51c22f1a8b494ba17a Mon Sep 17 00:00:00 2001
From: Jordan Harband <ljharb@gmail.com>
Date: Fri, 26 Aug 2016 15:45:20 -0700
Subject: [PATCH] [Fix] zero is a falsy but valid propValue.

Fixes #562.
---
 src/MountedTraversal.js        | 2 +-
 src/ShallowTraversal.js        | 2 +-
 test/ShallowTraversal-spec.jsx | 4 ++++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/MountedTraversal.js b/src/MountedTraversal.js
index 7b1f9da95..649cec776 100644
--- a/src/MountedTraversal.js
+++ b/src/MountedTraversal.js
@@ -100,7 +100,7 @@ export function instHasProperty(inst, propKey, stringifiedPropValue) {
     return false;
   }
 
-  if (propValue) {
+  if (propValue || propValue === 0) {
     return nodePropValue === propValue;
   }
 
diff --git a/src/ShallowTraversal.js b/src/ShallowTraversal.js
index e12608428..3975af8e3 100644
--- a/src/ShallowTraversal.js
+++ b/src/ShallowTraversal.js
@@ -97,7 +97,7 @@ export function nodeHasProperty(node, propKey, stringifiedPropValue) {
     return false;
   }
 
-  if (propValue) {
+  if (propValue || propValue === 0) {
     return nodePropValue === propValue;
   }
 
diff --git a/test/ShallowTraversal-spec.jsx b/test/ShallowTraversal-spec.jsx
index f31eed347..c7e95cc4f 100644
--- a/test/ShallowTraversal-spec.jsx
+++ b/test/ShallowTraversal-spec.jsx
@@ -110,6 +110,10 @@ describe('ShallowTraversal', () => {
       expect(nodeHasProperty(<div foo={2e8} />, 'foo', '2e8')).to.equal(true);
       expect(nodeHasProperty(<div foo={Infinity} />, 'foo', 'Infinity')).to.equal(true);
       expect(nodeHasProperty(<div foo={-Infinity} />, 'foo', '-Infinity')).to.equal(true);
+      expect(nodeHasProperty(<div foo={0} />, 'foo', '0')).to.equal(true);
+      expect(nodeHasProperty(<div foo={-0} />, 'foo', '-0')).to.equal(true);
+      expect(nodeHasProperty(<div foo={1} />, 'foo', '0')).to.equal(false);
+      expect(nodeHasProperty(<div foo={2} />, 'foo', '-0')).to.equal(false);
     });
 
     it('should throw when un unquoted string is passed in', () => {