adds tests

index.js

@@ -13,4 +13,4 @@ module.exports = function forIn(o, fn, thisArg) {
       break;
     }
   }
-};
+};

package.json

@@ -1,7 +1,7 @@
 {
   "name": "for-in",
   "description": "Iterate over the own and inherited enumerable properties of an objecte, and return an object with properties that evaluate to true from the callback. Exit early by returning `false`. JavaScript/Node.js",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "homepage": "https://github.com/jonschlinkert/for-in",
   "author": {
     "name": "Jon Schlinkert",

test.js

@@ -25,4 +25,21 @@ describe('.forIn()', function () {
     keys.should.eql(['a', 'b', 'c']);
     values.should.eql(['foo', 'bar', 'baz']);
   });
+
+  it('should break the loop early if `false` is returned.', function () {
+    var obj = {a: 'foo', b: 'bar', c: 'baz'};
+    var values = [];
+    var keys = [];
+
+    forIn(obj, function (value, key, o) {
+      if (key === 'b') {
+        return false;
+      }
+      keys.push(key);
+      values.push(value);
+    });
+
+    keys.should.eql(['a']);
+    values.should.eql(['foo']);
+  });
 });