test: Fix invalid test that breaks in zoneless (#28815)

Author: mmalerba

src/cdk/overlay/dispatchers/overlay-keyboard-dispatcher.spec.ts

@@ -1,10 +1,10 @@
-import {TestBed, inject} from '@angular/core/testing';
-import {dispatchKeyboardEvent} from '../../testing/private';
 import {ESCAPE} from '@angular/cdk/keycodes';
+import {ComponentPortal} from '@angular/cdk/portal';
 import {ApplicationRef, Component} from '@angular/core';
-import {OverlayModule, Overlay} from '../index';
+import {TestBed, inject} from '@angular/core/testing';
+import {dispatchKeyboardEvent} from '../../testing/private';
+import {Overlay, OverlayModule} from '../index';
 import {OverlayKeyboardDispatcher} from './overlay-keyboard-dispatcher';
-import {ComponentPortal} from '@angular/cdk/portal';
 
 describe('OverlayKeyboardDispatcher', () => {
   let appRef: ApplicationRef;
@@ -192,11 +192,6 @@ describe('OverlayKeyboardDispatcher', () => {
     expect(appRef.tick).toHaveBeenCalledTimes(0);
     dispatchKeyboardEvent(document.body, 'keydown', ESCAPE);
     expect(appRef.tick).toHaveBeenCalledTimes(0);
-
-    overlayRef.keydownEvents().subscribe();
-    dispatchKeyboardEvent(document.body, 'keydown', ESCAPE);
-
-    expect(appRef.tick).toHaveBeenCalledTimes(1);
   });
 });
 

tslint.json

@@ -164,8 +164,7 @@
         // Tests may need to verify behavior with zones.
         "**/*.spec.ts",
         // TODO(mmalerba): following files to be cleaned up and removed from this list:
-        "**/cdk/a11y/focus-trap/focus-trap.ts",
-        "**/material/tabs/paginated-tab-header.ts"
+        "**/cdk/a11y/focus-trap/focus-trap.ts"
       ]
     ]
   },