From eaba0be444ad9fb953bdefdf012db473f0c4b151 Mon Sep 17 00:00:00 2001
From: Derek Ekins <derek@spathi.com>
Date: Tue, 1 Sep 2015 13:45:38 +0100
Subject: [PATCH] fixed expect('').to.contain('') so it passes

---
 lib/chai/core/assertions.js | 2 +-
 test/assert.js              | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/chai/core/assertions.js b/lib/chai/core/assertions.js
index a35af8bf5..cc28e615d 100644
--- a/lib/chai/core/assertions.js
+++ b/lib/chai/core/assertions.js
@@ -214,7 +214,7 @@ module.exports = function (chai, _) {
       for (var k in val) subset[k] = obj[k];
       expected = _.eql(subset, val);
     } else {
-      expected = obj && ~obj.indexOf(val);
+      expected = (obj != undefined) && ~obj.indexOf(val);
     }
     this.assert(
         expected
diff --git a/test/assert.js b/test/assert.js
index be50ab421..3780a579a 100644
--- a/test/assert.js
+++ b/test/assert.js
@@ -430,6 +430,7 @@ describe('assert', function () {
 
   it('include', function() {
     assert.include('foobar', 'bar');
+    assert.include('', '');
     assert.include([ 1, 2, 3], 3);
     assert.include({a:1, b:2}, {b:2});