fix(jqLite): attr should ignore comment, text and attribute nodes

Follow jQuery handling of the `attr` function

Close angular#11038

Author: RobiFerentz

src/.jshintrc

@@ -94,6 +94,7 @@
     "skipDestroyOnNextJQueryCleanData": true,
 
     "NODE_TYPE_ELEMENT": false,
+    "NODE_TYPE_ATTRIBUTE": false,
     "NODE_TYPE_TEXT": false,
     "NODE_TYPE_COMMENT": false,
     "NODE_TYPE_COMMENT": false,

src/Angular.js

@@ -85,6 +85,7 @@
   createMap: true,
 
   NODE_TYPE_ELEMENT: true,
+  NODE_TYPE_ATTRIBUTE: true,
   NODE_TYPE_TEXT: true,
   NODE_TYPE_COMMENT: true,
   NODE_TYPE_DOCUMENT: true,
@@ -1599,6 +1600,7 @@ function createMap() {
 }
 
 var NODE_TYPE_ELEMENT = 1;
+var NODE_TYPE_ATTRIBUTE = 2;
 var NODE_TYPE_TEXT = 3;
 var NODE_TYPE_COMMENT = 8;
 var NODE_TYPE_DOCUMENT = 9;

src/jqLite.js

@@ -587,6 +587,10 @@ forEach({
   },
 
   attr: function(element, name, value) {
+    var nodeType = element.nodeType;
+    if (nodeType === NODE_TYPE_TEXT || nodeType === NODE_TYPE_ATTRIBUTE || nodeType === NODE_TYPE_COMMENT) {
+      return;
+    }
     var lowercasedName = lowercase(name);
     if (BOOLEAN_ATTR[lowercasedName]) {
       if (isDefined(value)) {

test/jqLiteSpec.js

@@ -612,6 +612,30 @@ describe('jqLite', function() {
       expect(elm.attr('readOnly')).toBeUndefined();
       expect(elm.attr('disabled')).toBeUndefined();
     });
+
+    it('should do nothing when setting or getting on attribute nodes', function() {
+      var attrNode = jqLite(document.createAttribute('myattr'));
+      expect(attrNode).toBeDefined();
+      expect(attrNode[0].nodeType).toEqual(2);
+      expect(attrNode.attr('some-attribute','somevalue')).toEqual(attrNode);
+      expect(attrNode.attr('some-attribute')).toBeUndefined();
+    });
+
+    it('should do nothing when setting or getting on text nodes', function() {
+      var textNode = jqLite(document.createTextNode('some text'));
+      expect(textNode).toBeDefined();
+      expect(textNode[0].nodeType).toEqual(3);
+      expect(textNode.attr('some-attribute','somevalue')).toEqual(textNode);
+      expect(textNode.attr('some-attribute')).toBeUndefined();
+    });
+
+    it('should do nothing when setting or getting on comment nodes', function() {
+      var comment = jqLite(document.createComment('some comment'));
+      expect(comment).toBeDefined();
+      expect(comment[0].nodeType).toEqual(8);
+      expect(comment.attr('some-attribute','somevalue')).toEqual(comment);
+      expect(comment.attr('some-attribute')).toBeUndefined();
+    });
   });