fix(cdk/dialog): use config injector if provided (#25332)

Co-authored-by: Laurent Dulary <dularylaurent@gmail.com>
(cherry picked from commit ea4e203)

Author: 2 people

src/cdk/dialog/dialog.spec.ts

@@ -11,6 +11,7 @@ import {
   Component,
   Directive,
   Inject,
+  InjectionToken,
   Injector,
   TemplateRef,
   ViewChild,
@@ -125,6 +126,15 @@ describe('Dialog', () => {
     );
   });
 
+  it('should use custom injector', () => {
+    const token = new InjectionToken<string>('message');
+    const injector = Injector.create({providers: [{provide: token, useValue: 'hello'}]});
+    const dialogRef = dialog.open(PizzaMsg, {injector});
+    viewContainerFixture.detectChanges();
+
+    expect(dialogRef.componentInstance?.dialogInjector.get(token)).toBe('hello');
+  });
+
   it('should open a dialog with a component and no ViewContainerRef', () => {
     let dialogRef = dialog.open(PizzaMsg);
 

src/cdk/dialog/dialog.ts

@@ -333,7 +333,7 @@ export class Dialog implements OnDestroy {
       });
     }
 
-    return Injector.create({parent: userInjector || this._injector, providers});
+    return Injector.create({parent: config.injector || userInjector || this._injector, providers});
   }
 
   /**