Fixed bug when mutating array.length. Was storing two mutations instead of one

Author: Josema

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dop",
-  "version": "0.24.0",
+  "version": "0.24.1",
   "main": "./dist/dop.nodejs.js",
   "browser": "./dist/dop.js",
   "unpkg": "./dist/dop.min.js",

src/core/mutators/set.js

@@ -43,7 +43,7 @@ dop.core.set = function(object, property, value) {
                     mutation.oldValue = dop.util.clone(oldValue)
 
                 // If is array and length is different we must store the length 
-                if (objectTarget.length !== length && objectIsArray)
+                if (property !== 'length' && objectTarget.length !== length && objectIsArray)
                     dop.core.storeMutation({
                         object: objectProxy,
                         prop: 'length',

test/mutation.js

@@ -404,5 +404,23 @@ test('unobserve = observer.observe(...)', function(t) {
     set(object, 'newprop', 'blabla')
     t.equal(times, 2)
 
+    t.end()
+})
+
+
+
+test('mutating length of array', function(t) {
+    var object = dop.register({array:[1,2,3]})
+    var times = 0
+    var observer = dop.createObserver(function(mutations) {
+        times += 1
+    })
+    observer.observe(object.array)
+    observer.observe(object.array, 'length')
+    set(object.array, 'length', 1)
+    t.equal(object.array.length, 1)
+    t.equal(times, 1)
+    
+
     t.end()
 })