feat(ElementInjector): change ElementInjector so @parent and @ancestor do not include self.

modules/core/src/compiler/element_injector.js

@@ -377,6 +377,12 @@ export class ElementInjector extends TreeNode {
    */
   _getByKey(key:Key, depth:int, requestor:Key) {
     var ei = this;
+
+    if (! this._shouldIncludeSelf(depth)) {
+      depth -= 1;
+      ei = ei._parent;
+    }
+
     while (ei != null && depth >= 0) {
       var specObj = ei._getSpecialObjectByKeyId(key.id);
       if (specObj !== _undefined) return specObj;
@@ -387,6 +393,7 @@ export class ElementInjector extends TreeNode {
       ei = ei._parent;
       depth -= 1;
     }
+
     if (isPresent(this._host) && this._host._isComponentKey(key)) {
       return this._host.getComponent();
     } else {
@@ -400,6 +407,10 @@ export class ElementInjector extends TreeNode {
     }
   }
 
+  _shouldIncludeSelf(depth:int) {
+    return depth === 0;
+  }
+
   _getSpecialObjectByKeyId(keyId:int) {
     var staticKeys = StaticKeys.instance();
     if (keyId === staticKeys.viewId) return this._view;

modules/core/test/compiler/element_injector_spec.js

@@ -225,6 +225,12 @@ export function main() {
         expect(d.dependency).toBeAnInstanceOf(Directive);
       });
 
+      it("should not return parent's directives on self", function () {
+        expect(() => {
+          injector([Directive, NeedDirectiveFromParent]);
+        }).toThrowError();
+      });
+
       it("should get directives from ancestor", function () {
         var child = parentChildInjectors([Directive], [NeedDirectiveFromAncestor]);