fix(ivy): host attributes and @COmponentChild should be supported on the same component (angular#29565)

PR Close angular#29565

Author: marclaval

packages/core/src/render3/component.ts

@@ -203,6 +203,12 @@ export function createRootComponent<T>(
 
   hostFeatures && hostFeatures.forEach((feature) => feature(component, componentDef));
 
+  // We want to generate an empty QueryList for root content queries for backwards
+  // compatibility with ViewEngine.
+  if (componentDef.contentQueries) {
+    componentDef.contentQueries(RenderFlags.Create, component, rootView.length - 1);
+  }
+
   const rootTNode = getPreviousOrParentTNode();
   if (tView.firstTemplatePass && componentDef.hostBindings) {
     const expando = tView.expandoInstructions !;
@@ -217,12 +223,6 @@ export function createRootComponent<T>(
     renderInitialStyles(native, rootTNode.stylingTemplate, componentView[RENDERER]);
   }
 
-  // We want to generate an empty QueryList for root content queries for backwards
-  // compatibility with ViewEngine.
-  if (componentDef.contentQueries) {
-    componentDef.contentQueries(RenderFlags.Create, component, rootView.length - 1);
-  }
-
   return component;
 }
 

packages/core/test/acceptance/integration_spec.ts

@@ -5,7 +5,7 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-import {Component, Directive, HostBinding, HostListener, Input, QueryList, ViewChildren} from '@angular/core';
+import {Component, ContentChild, Directive, HostBinding, HostListener, Input, QueryList, TemplateRef, ViewChildren} from '@angular/core';
 import {TestBed} from '@angular/core/testing';
 import {By} from '@angular/platform-browser';
 import {expect} from '@angular/platform-browser/testing/src/matchers';
@@ -102,4 +102,19 @@ describe('acceptance integration tests', () => {
       fixture.detectChanges();
     }).not.toThrow();
   });
+
+  it('should support host attribute and @ContentChild on the same component', () => {
+    @Component(
+        {selector: 'test-component', template: `foo`, host: {'[attr.aria-disabled]': 'true'}})
+    class TestComponent {
+      @ContentChild(TemplateRef) tpl !: TemplateRef<any>;
+    }
+
+    TestBed.configureTestingModule({declarations: [TestComponent]});
+    const fixture = TestBed.createComponent(TestComponent);
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.tpl).not.toBeNull();
+    expect(fixture.debugElement.nativeElement.getAttribute('aria-disabled')).toBe('true');
+  });
 });