build: move private testing helpers outside platform-browser/testing (#61571)

These helpers are often imported by various tests throughout the repository, but the helpers aren't exported/exposed from the public entry-point; even though they confusingly reside in there. This commit fixes this, and moves the helpers into `packages/private/testing`. This is a preparation for the `ts_project` migration where we don't want to leverage deep imports between packages. PR Close #61571

Author: devversion

packages/animations/browser/src/private_export.ts

@@ -32,3 +32,5 @@ export {
  camelCaseToDashCase as ɵcamelCaseToDashCase,
  normalizeKeyframes as ɵnormalizeKeyframes,
 } from './util';
+export {TransitionAnimationPlayer as ɵTransitionAnimationPlayer} from './render/transition_animation_engine';
+export {ENTER_CLASSNAME as ɵENTER_CLASSNAME, LEAVE_CLASSNAME as ɵLEAVE_CLASSNAME} from './util';

packages/animations/browser/test/BUILD.bazel

@@ -5,8 +5,10 @@ ts_project(
  name = "test_lib",
  testonly = True,
  srcs = glob(["**/*.ts"]),
+ interop_deps = [
+ "//packages/private/testing",
+ ],
  deps = [
- "//packages:types_rjs",
  "//packages/animations:animations_rjs",
  "//packages/animations/browser:browser_rjs",
  "//packages/animations/browser/testing:testing_rjs",

packages/animations/browser/test/dsl/animation_spec.ts

@@ -5,6 +5,9 @@
  * 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 {isNode} from '@angular/private/testing';
+
 import {
  animate,
  animation,

packages/animations/browser/test/dsl/animation_trigger_spec.ts

@@ -6,6 +6,8 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
+import {isNode} from '@angular/private/testing';
+
 import {animate, AnimationOptions, state, style, transition} from '../../../src/animations';
 import {AnimationTransitionInstruction} from '../../src/dsl/animation_transition_instruction';
 import {AnimationTrigger} from '../../src/dsl/animation_trigger';

packages/animations/browser/test/render/timeline_animation_engine_spec.ts

@@ -5,6 +5,9 @@
  * 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 {isNode} from '@angular/private/testing';
+
 import {animate, AnimationMetadata, style} from '../../../src/animations';
 
 import {

packages/animations/browser/test/render/transition_animation_engine_spec.ts

@@ -10,7 +10,6 @@ import {
  AnimationEvent,
  AnimationMetadata,
  AnimationTriggerMetadata,
- NoopAnimationPlayer,
  state,
  style,
  transition,
@@ -30,6 +29,7 @@ import {
  TransitionAnimationPlayer,
 } from '../../src/render/transition_animation_engine';
 import {MockAnimationDriver, MockAnimationPlayer} from '../../testing/src/mock_animation_driver';
+import {isNode} from '@angular/private/testing';
 
 const DEFAULT_NAMESPACE_ID = 'id';
 

packages/animations/browser/test/render/web_animations/web_animations_driver_spec.ts

@@ -5,6 +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.dev/license
  */
+import {isNode} from '@angular/private/testing';
 import {WebAnimationsDriver} from '../../../src/render/web_animations/web_animations_driver';
 import {WebAnimationsPlayer} from '../../../src/render/web_animations/web_animations_player';
 

packages/animations/test/BUILD.bazel

@@ -12,6 +12,7 @@ ts_project(
  "//packages/platform-browser/animations",
  "//packages/platform-browser/animations/async",
  "//packages/platform-browser/testing",
+ "//packages/private/testing",
  ],
  deps = [
  "//packages:types_rjs",

packages/animations/test/browser_animation_builder_spec.ts

@@ -20,6 +20,7 @@ import {ɵDomRendererFactory2 as DomRendererFactory2} from '@angular/platform-br
 import {NoopAnimationsModule} from '@angular/platform-browser/animations';
 import {ɵAsyncAnimationRendererFactory as AsyncAnimationRendererFactory} from '@angular/platform-browser/animations/async';
 import {BrowserTestingModule, platformBrowserTesting} from '@angular/platform-browser/testing';
+import {isNode} from '@angular/private/testing';
 
 describe('BrowserAnimationBuilder', () => {
  if (isNode) {

packages/common/http/test/resource_spec.ts

@@ -6,6 +6,7 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
+import {isNode} from '@angular/private/testing';
 import {ApplicationRef, Injector, signal} from '@angular/core';
 import {TestBed} from '@angular/core/testing';
 import {