Add .addProperty class method

myme · Feb 28, 2013 · 9d918e0 · 9d918e0
1 parent 00e9aa0
commit 9d918e0
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diff --git a/src/backbonejs-computed.js b/src/backbonejs-computed.js
@@ -100,6 +100,20 @@ this.Backbone.Model = (function ( Model, _ ) {
 
   }, {
 
+    addProperty: function ( name, deps, action ) {
+      if ( action === undefined ) {
+        action = deps;
+        deps = [];
+      }
+
+      this.prototype._computedProps[ name ] = {
+        action: action,
+        deps: deps
+      };
+
+      return this;
+    },
+
     // Override Bootstrap.Model's extend
     extend: _.wrap( Model.extend, function ( extend, properties, classProperties ) {
       var prop, action, propSpec, deps;

diff --git a/test/backbonejs-computed-test.js b/test/backbonejs-computed-test.js
@@ -144,6 +144,27 @@
         assert.equals( model.get( 'oof' ), 'xuuq' );
       }
 
+    },
+
+    '.addProperty (class method)': {
+
+      'is a function': function () {
+        var Model = Backbone.Model.extend();
+        assert.isFunction( Model.addProperty );
+      },
+
+      'returns class': function () {
+        var Model = Backbone.Model.extend();
+        assert.same( Model.addProperty(), Model );
+      },
+
+      'adds a new class computed property': function () {
+        var Model = Backbone.Model.extend();
+        Model.addProperty( 'foo', function () { return 10; });
+        var model = new Model();
+        assert.equals( model.get( 'foo' ), 10 );
+      }
+
     }
 
   });