Implemented ability to clone dependencies

karma.conf.js

@@ -12,7 +12,7 @@ module.exports = function(config) {
             'src/js/app.js',
             'src/js/components/*.js',
             'src/js/app/**/*.js',
-            'tests/*.js'
+            'tests/**/*.js'
         ]
     });
 };

src/js/core/di.js

@@ -4,24 +4,27 @@
     var is = core.is;
 
     function Container(store) {
-        this.store = {};
+        this.store = store || {};
         this.resolutionStack = [];
     }
 
     Container.prototype.register = function(name, def) {
-        var reg = this.store[name];
-        if(reg == null) {
-            if(def instanceof Registration) {
-                reg = def;
-            }
-            else {
-                reg = new Registration(def);
-            }
+        var reg;
 
-            reg.name = name;
-            this.store[name] = reg;
+        if(this.store[name] != null)  {
+            console.warn("Previous registration for [%1] has been replaced", name);
         }
 
+        if(def instanceof Registration) {
+            reg = def;
+        }
+        else {
+            reg = new Registration(def);
+        }
+
+        reg.name = name;
+        this.store[name] = reg;
+
         // console.log('[' + name + '] component registered');
         return reg;
     };
@@ -54,6 +57,14 @@
 
         return reg.resolved;
     }
+    
+    Container.prototype.clone = function () {
+        var newStore = {};
+        for(var key in this.store) {
+            newStore[key] = this.store[key];
+        }
+        return new Container(newStore);
+    };
 
 
     function Registration(definition) {

tests/core/diSpec.js

@@ -0,0 +1,20 @@
+describe("cloned container", function() {
+    var objA = { id: "a"};
+    var objB = { id: "b" };
+    var objC = { id: 'c'};
+
+    var parent = new core.Container();
+
+    parent.register('a', objA);
+    parent.register('b', objB);
+
+    var cloned = parent.clone();
+    cloned.register('a', objC);
+
+    it("should be independent from source container", function() {
+        expect(parent.resolve('a')).toBe(objA);
+        expect(cloned.resolve('a')).toBe(objC);
+        expect(parent.resolve('b')).toBe(objB);
+        expect(cloned.resolve('b')).toBe(objB);
+    });
+});