test: fix invalid directionality providers

src/cdk/drag-drop/directives/drop-list-shared.spec.ts

@@ -1,14 +1,3 @@
-import {Directionality} from '../../bidi';
-import {Platform, _supportsShadowDom} from '../../platform';
-import {CdkScrollable, ViewportRuler} from '../../scrolling';
-import {
-  createMouseEvent,
-  createTouchEvent,
-  dispatchEvent,
-  dispatchFakeEvent,
-  dispatchMouseEvent,
-  dispatchTouchEvent,
-} from '../../testing/private';
 import {
   AfterViewInit,
   ChangeDetectionStrategy,
@@ -25,20 +14,33 @@ import {
   signal,
 } from '@angular/core';
 import {ComponentFixture, TestBed, fakeAsync, flush, tick} from '@angular/core/testing';
-import {of as observableOf} from 'rxjs';
+import {Platform, _supportsShadowDom} from '../../platform';
+import {CdkScrollable, ViewportRuler} from '../../scrolling';
+import {
+  createMouseEvent,
+  createTouchEvent,
+  dispatchEvent,
+  dispatchFakeEvent,
+  dispatchMouseEvent,
+  dispatchTouchEvent,
+} from '../../testing/private';
 
 import {extendStyles} from '../dom/styling';
 import {CdkDragDrop, CdkDragEnter, CdkDragStart} from '../drag-events';
 import {DragRef, Point, PreviewContainer} from '../drag-ref';
 import {moveItemInArray} from '../drag-utils';
 
+import {provideFakeDirectionality} from '@angular/cdk/testing/private/fake-directionality';
+import {NgClass, NgFor, NgIf, NgTemplateOutlet} from '@angular/common';
 import {CDK_DRAG_CONFIG, DragAxis, DragDropConfig, DropListOrientation} from './config';
 import {CdkDrag} from './drag';
+import {CdkDragPlaceholder} from './drag-placeholder';
+import {CdkDragPreview} from './drag-preview';
 import {CdkDropList} from './drop-list';
 import {CdkDropListGroup} from './drop-list-group';
 import {
-  createComponent as _createComponent,
   DragDropTestConfig,
+  createComponent as _createComponent,
   continueDraggingViaTouch,
   dragElementViaMouse,
   makeScrollable,
@@ -47,9 +49,6 @@ import {
   stopDraggingViaTouch,
   tickAnimationFrames,
 } from './test-utils.spec';
-import {NgClass, NgFor, NgIf, NgTemplateOutlet} from '@angular/common';
-import {CdkDragPreview} from './drag-preview';
-import {CdkDragPlaceholder} from './drag-placeholder';
 
 export const ITEM_HEIGHT = 25;
 export const ITEM_WIDTH = 75;
@@ -551,12 +550,7 @@ export function defineCommonDropListTests(config: {
 
     it('should dispatch the correct `dropped` event in RTL horizontal drop zone', fakeAsync(() => {
       const fixture = createComponent(DraggableInHorizontalDropZone, {
-        providers: [
-          {
-            provide: Directionality,
-            useValue: {value: 'rtl', change: observableOf()},
-          },
-        ],
+        providers: [provideFakeDirectionality('rtl')],
       });
 
       fixture.nativeElement.setAttribute('dir', 'rtl');
@@ -1200,12 +1194,7 @@ export function defineCommonDropListTests(config: {
 
     it('should pass the proper direction to the preview in rtl', fakeAsync(() => {
       const fixture = createComponent(DraggableInDropZone, {
-        providers: [
-          {
-            provide: Directionality,
-            useValue: {value: 'rtl', change: observableOf()},
-          },
-        ],
+        providers: [provideFakeDirectionality('rtl')],
       });
 
       fixture.detectChanges();
@@ -2500,12 +2489,7 @@ export function defineCommonDropListTests(config: {
 
     it('should auto-scroll right if the user holds their pointer at right edge in rtl', fakeAsync(() => {
       const fixture = createComponent(DraggableInScrollableHorizontalDropZone, {
-        providers: [
-          {
-            provide: Directionality,
-            useValue: {value: 'rtl', change: observableOf()},
-          },
-        ],
+        providers: [provideFakeDirectionality('rtl')],
       });
       fixture.nativeElement.setAttribute('dir', 'rtl');
       fixture.detectChanges();
@@ -2529,12 +2513,7 @@ export function defineCommonDropListTests(config: {
 
     it('should auto-scroll left if the user holds their pointer at left edge in rtl', fakeAsync(() => {
       const fixture = createComponent(DraggableInScrollableHorizontalDropZone, {
-        providers: [
-          {
-            provide: Directionality,
-            useValue: {value: 'rtl', change: observableOf()},
-          },
-        ],
+        providers: [provideFakeDirectionality('rtl')],
       });
       fixture.nativeElement.setAttribute('dir', 'rtl');
       fixture.detectChanges();

src/cdk/overlay/overlay-directives.spec.ts

@@ -1,10 +1,11 @@
-import {Directionality} from '../bidi';
-import {A, ESCAPE} from '../keycodes';
-import {Component, ElementRef, Injector, ViewChild} from '@angular/core';
-import {ComponentFixture, TestBed, fakeAsync, tick, waitForAsync} from '@angular/core/testing';
+import {Component, ElementRef, Injector, signal, ViewChild, WritableSignal} from '@angular/core';
+import {ComponentFixture, fakeAsync, TestBed, tick, waitForAsync} from '@angular/core/testing';
 import {By} from '@angular/platform-browser';
 import {Subject} from 'rxjs';
+import {Direction} from '../bidi';
+import {A, ESCAPE} from '../keycodes';
 import {createKeyboardEvent, dispatchEvent, dispatchKeyboardEvent} from '../testing/private';
+import {provideFakeDirectionality} from '../testing/private/fake-directionality';
 import {
   CdkConnectedOverlay,
   CdkOverlayOrigin,
@@ -27,14 +28,16 @@ import {
 describe('Overlay directives', () => {
   let overlayContainerElement: HTMLElement;
   let fixture: ComponentFixture<ConnectedOverlayDirectiveTest>;
-  let dir: {value: string};
+  let dir: WritableSignal<Direction>;
   let scrolledSubject = new Subject();
 
   beforeEach(() => {
+    dir = signal<Direction>('ltr');
+
     TestBed.configureTestingModule({
       imports: [OverlayModule, ConnectedOverlayDirectiveTest, ConnectedOverlayPropertyInitOrder],
       providers: [
-        {provide: Directionality, useFactory: () => (dir = {value: 'ltr'})},
+        provideFakeDirectionality(dir),
         {
           provide: ScrollDispatcher,
           useFactory: () => ({
@@ -115,7 +118,7 @@ describe('Overlay directives', () => {
   });
 
   it('should set and update the `dir` attribute', () => {
-    dir.value = 'rtl';
+    dir.set('rtl');
     fixture.componentInstance.isOpen = true;
     fixture.changeDetectorRef.markForCheck();
     fixture.detectChanges();
@@ -130,7 +133,7 @@ describe('Overlay directives', () => {
     fixture.changeDetectorRef.markForCheck();
     fixture.detectChanges();
 
-    dir.value = 'ltr';
+    dir.set('ltr');
     fixture.componentInstance.isOpen = true;
     fixture.changeDetectorRef.markForCheck();
     fixture.detectChanges();

src/cdk/overlay/overlay.spec.ts

@@ -9,7 +9,9 @@ import {
   Type,
   ViewChild,
   ViewContainerRef,
+  WritableSignal,
   inject,
+  signal,
 } from '@angular/core';
 import {
   ComponentFixture,
@@ -23,15 +25,16 @@ import {NoopAnimationsModule} from '@angular/platform-browser/animations';
 import {Direction, Directionality} from '../bidi';
 import {CdkPortal, ComponentPortal, TemplatePortal} from '../portal';
 import {dispatchFakeEvent} from '../testing/private';
+import {provideFakeDirectionality} from '../testing/private/fake-directionality';
 import {
-  createOverlayRef,
   Overlay,
   OverlayConfig,
   OverlayContainer,
   OverlayModule,
   OverlayRef,
   PositionStrategy,
   ScrollStrategy,
+  createOverlayRef,
 } from './index';
 
 describe('Overlay', () => {
@@ -41,22 +44,15 @@ describe('Overlay', () => {
   let overlayContainerElement: HTMLElement;
   let overlayContainer: OverlayContainer;
   let viewContainerFixture: ComponentFixture<TestComponentWithTemplatePortals>;
-  let dir: Direction;
+  let dir: WritableSignal<Direction>;
   let mockLocation: SpyLocation;
 
   function setup(imports: Type<unknown>[] = []) {
-    dir = 'ltr';
+    dir = signal<Direction>('ltr');
     TestBed.configureTestingModule({
       imports: [OverlayModule, ...imports],
       providers: [
-        {
-          provide: Directionality,
-          useFactory: () => {
-            const fakeDirectionality = {};
-            Object.defineProperty(fakeDirectionality, 'value', {get: () => dir});
-            return fakeDirectionality;
-          },
-        },
+        provideFakeDirectionality(dir),
         {
           provide: Location,
           useClass: SpyLocation,
@@ -175,7 +171,7 @@ describe('Overlay', () => {
   });
 
   it('should take the default direction from the global Directionality', () => {
-    dir = 'rtl';
+    dir.set('rtl');
     const overlayRef = createOverlayRef(injector);
 
     overlayRef.attach(componentPortal);

src/cdk/testing/private/BUILD.bazel

@@ -12,6 +12,7 @@ ts_project(
     deps = [
         "//:node_modules/@angular/core",
         "//:node_modules/@types/jasmine",
+        "//src/cdk/bidi",
         "//src/cdk/testing/testbed",
     ],
 )

src/cdk/testing/private/fake-directionality.ts

@@ -0,0 +1,38 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+
+import {Direction, Directionality} from '@angular/cdk/bidi';
+import {EventEmitter, signal, WritableSignal} from '@angular/core';
+import {toObservable} from '@angular/core/rxjs-interop';
+import {skip} from 'rxjs/operators';
+
+// Note: ngOnDestroy not needed, but must include it to match the Directionality interface.
+// Implementing the interface ensures the fake stays in sync with the real API.
+// tslint:disable-next-line:no-undecorated-class-with-angular-features lifecycle-hook-interface
+class FakeDirectionality implements Directionality {
+  readonly change: EventEmitter<Direction>;
+
+  get value(): Direction {
+    return this.valueSignal();
+  }
+
+  constructor(readonly valueSignal: WritableSignal<Direction>) {
+    this.change = toObservable(valueSignal).pipe(skip(1)) as EventEmitter<Direction>;
+  }
+
+  ngOnDestroy() {}
+}
+
+export function provideFakeDirectionality(direction: Direction | WritableSignal<Direction>) {
+  return {
+    provide: Directionality,
+    useFactory: () =>
+      new FakeDirectionality(typeof direction === 'string' ? signal(direction) : direction),
+    deps: [],
+  };
+}

src/cdk/testing/private/public-api.ts

@@ -6,6 +6,7 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
+export * from './fake-directionality';
 export * from './text-dedent';
 export * from './wrapped-error-message';
 

src/cdk/tree/BUILD.bazel

@@ -41,6 +41,7 @@ ts_project(
         "//src/cdk/bidi",
         "//src/cdk/collections",
         "//src/cdk/keycodes",
+        "//src/cdk/testing/private",
         "//src/cdk/testing/testbed",
     ],
 )

src/cdk/tree/tree-with-tree-control.spec.ts

@@ -5,27 +5,29 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.dev/license
  */
-import {ComponentFixture, TestBed} from '@angular/core/testing';
 import {
   Component,
   ErrorHandler,
-  ViewChild,
+  QueryList,
+  signal,
   TrackByFunction,
   Type,
-  EventEmitter,
+  ViewChild,
   ViewChildren,
-  QueryList,
+  WritableSignal,
 } from '@angular/core';
+import {ComponentFixture, TestBed} from '@angular/core/testing';
 
+import {BehaviorSubject, combineLatest, Observable} from 'rxjs';
+import {map} from 'rxjs/operators';
+import {Direction} from '../bidi';
 import {CollectionViewer, DataSource} from '../collections';
-import {Directionality, Direction} from '../bidi';
 import {createKeyboardEvent} from '../testing/testbed/fake-events';
-import {combineLatest, BehaviorSubject, Observable} from 'rxjs';
-import {map} from 'rxjs/operators';
 
-import {TreeControl} from './control/tree-control';
+import {provideFakeDirectionality} from '../testing/private/fake-directionality';
 import {FlatTreeControl} from './control/flat-tree-control';
 import {NestedTreeControl} from './control/nested-tree-control';
+import {TreeControl} from './control/tree-control';
 import {CdkTreeModule, CdkTreeNodePadding} from './index';
 import {CdkTree, CdkTreeNode} from './tree';
 
@@ -35,16 +37,14 @@ describe('CdkTree with TreeControl', () => {
   let dataSource: FakeDataSource;
   let treeElement: HTMLElement;
   let tree: CdkTree<TestData>;
-  let dir: {value: Direction; readonly change: EventEmitter<Direction>};
+  let dir: WritableSignal<Direction>;
 
   function configureCdkTreeTestingModule(declarations: Type<any>[]) {
+    dir = signal('ltr');
     TestBed.configureTestingModule({
       imports: [CdkTreeModule],
       providers: [
-        {
-          provide: Directionality,
-          useFactory: () => (dir = {value: 'ltr', change: new EventEmitter<Direction>()}),
-        },
+        provideFakeDirectionality(dir),
         // Custom error handler that re-throws the error. Errors happening within
         // change detection phase will be reported through the handler and thrown
         // in Ivy. Since we do not want to pollute the "console.error", but rather
@@ -242,8 +242,7 @@ describe('CdkTree with TreeControl', () => {
         expect(node.style.paddingLeft).toBe('10px');
         expect(node.style.paddingRight).toBeFalsy();
 
-        dir.value = 'rtl';
-        dir.change.emit('rtl');
+        dir.set('rtl');
         fixture.detectChanges();
 
         expect(node.style.paddingRight).toBe('10px');