fix(form): pick the right attribute name for ngForm

Closes #2997

src/ng/directive/form.js

@@ -23,7 +23,7 @@ var nullFormCtrl = {
  *
  *  - keys are validation tokens (error names) — such as `required`, `url` or `email`),
  *  - values are arrays of controls or forms that are invalid with given error.
- * 
+ *
  * @description
  * `FormController` keeps track of all its controls and nested forms as well as state of them,
  * such as being valid/invalid or dirty/pristine.
@@ -42,7 +42,7 @@ function FormController(element, attrs) {
       controls = [];
 
   // init state
-  form.$name = attrs.name;
+  form.$name = attrs.name || attrs.ngForm;
   form.$dirty = false;
   form.$pristine = true;
   form.$valid = true;
@@ -108,7 +108,7 @@ function FormController(element, attrs) {
    *
    * @description
    * Sets the validity of a form control.
-   * 
+   *
    * This method will also propagate to parent forms.
    */
   form.$setValidity = function(validationToken, isValid, control) {

test/ng/directive/formSpec.js

@@ -63,6 +63,17 @@ describe('form', function() {
     expect(scope.myForm.alias).toBeDefined();
   });
 
+  it('should use ngForm value as form name when nested inside form', function () {
+    doc = $compile(
+      '<form name="myForm">' +
+        '<div ng-form="nestedForm"><input type="text" name="alias" ng-model="value"/></div>' +
+      '</form>')(scope);
+
+    expect(scope.myForm).toBeDefined();
+    expect(scope.myForm.nestedForm).toBeDefined();
+    expect(scope.myForm.nestedForm.alias).toBeDefined();
+  });
+
 
   it('should publish form to scope when name attr is defined', function() {
     doc = $compile('<form name="myForm"></form>')(scope);