From 4238e84ec48104c7d625ea9503eea9c54cf8ffef Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Sat, 9 Aug 2014 09:39:29 -0700
Subject: [PATCH] Add tests for matching `NaN`.

---
 test/test.js | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/test/test.js b/test/test.js
index b83802996..d0c81a4a2 100644
--- a/test/test.js
+++ b/test/test.js
@@ -1902,6 +1902,10 @@
       strictEqual(_.contains([3, 2, 1], 3, true), true);
     });
 
+    test('should match `NaN`', 1, function() {
+      strictEqual(_.contains([1, NaN, 3], NaN), true);
+    });
+
     test('should be aliased', 1, function() {
       strictEqual(_.include, _.contains);
     });
@@ -2857,6 +2861,10 @@
       deepEqual(actual, [1, 3]);
     });
 
+    test('should match `NaN`', 1, function() {
+      deepEqual(_.difference([1, NaN, 3], [NaN, 5, NaN]), [1, 3]);
+    });
+
     test('should work with large arrays', 1, function() {
       var array1 = _.range(LARGE_ARRAY_SIZE + 1),
           array2 = _.range(LARGE_ARRAY_SIZE),
@@ -4793,6 +4801,10 @@
       deepEqual(_.intersection(array), [1, 3, 2]);
     });
 
+    test('should match `NaN`', 1, function() {
+      deepEqual(_.intersection([1, NaN, 3], [NaN, 5, NaN]), [NaN]);
+    });
+
     test('should work with large arrays of objects', 1, function() {
       var object = {},
           largeArray = _.times(LARGE_ARRAY_SIZE, _.constant(object));
@@ -6722,6 +6734,10 @@
       strictEqual(func(empty, undefined), -1);
       strictEqual(func(empty, undefined, true), -1);
     });
+
+    test('`_.' + methodName + '` should match `NaN`', 1, function() {
+      strictEqual(func([1, NaN, 3], NaN), 1);
+    });
   });
 
   /*--------------------------------------------------------------------------*/
@@ -8489,6 +8505,13 @@
       _.pull(array, undefined);
       deepEqual(array, [1, 3]);
     });
+
+    test('should match `NaN`', 1, function() {
+      var array = [1, NaN, 3, NaN];
+
+      _.pull(array, NaN);
+      deepEqual(array, [1, 3]);
+    });
   }());
 
   /*--------------------------------------------------------------------------*/
@@ -11024,6 +11047,10 @@
       deepEqual(_.uniq(objects), objects);
     });
 
+    test('should not treat `NaN` as uniq', 1, function() {
+      deepEqual(_.uniq([1, NaN, 3, NaN]), [1, NaN, 3]);
+    });
+
     test('should work with `isSorted`', 3, function() {
       var expected = [1, 2, 3];
       deepEqual(_.uniq([1, 2, 3], true), expected);