Ensure tests do not log warning or errors

This commit increases strictnes of tests by failing on tests (even
though they pass) if `console.warn` or `console.error` is used. This is
used to fix warning outputs from Vue, cleaning up test output and
preventing potential issues with tests.

This commit fixes all of the failing tests, including refactoring in
code to make them more testable through injecting Vue lifecycle
hook function stubs. This removes `shallowMount`ing done on places,
improving the speed of executing unit tests. It also reduces complexity
and increases maintainability by removing `@vue/test-utils` dependency
for these tests.

Changes:

- Register global hook for all tests to fail if console.error or
  console.warn is being used.
- Fix all issues with failing tests.
- Create test helper function for running code in a wrapper component to
  run code in reliable/unified way to surpress Vue warnings about code
  not running inside `setup`.

src/presentation/components/Scripts/Slider/UseDragHandler.ts

@@ -3,6 +3,7 @@ import {
 } from 'vue';
 import { throttle } from '@/application/Common/Timing/Throttle';
 import type { Ref } from 'vue';
+import type { LifecycleHook } from '../../Shared/Hooks/Common/LifecycleHook';
 
 const ThrottleInMs = 15;
 
@@ -10,6 +11,7 @@ export function useDragHandler(
   draggableElementRef: Readonly<Ref<HTMLElement | undefined>>,
   dragDomModifier: DragDomModifier = new GlobalDocumentDragDomModifier(),
   throttler = throttle,
+  onTeardown: LifecycleHook = onUnmounted,
 ) {
   const displacementX = ref(0);
   const isDragging = ref(false);
@@ -52,7 +54,7 @@ export function useDragHandler(
     element.addEventListener('pointerdown', startDrag);
   }
 
-  onUnmounted(() => {
+  onTeardown(() => {
     stopDrag();
   });
 

src/presentation/components/Scripts/Slider/UseGlobalCursor.ts

@@ -1,9 +1,11 @@
 import { watch, type Ref, onUnmounted } from 'vue';
+import type { LifecycleHook } from '../../Shared/Hooks/Common/LifecycleHook';
 
 export function useGlobalCursor(
   isActive: Readonly<Ref<boolean>>,
   cursorCssValue: string,
   documentAccessor: CursorStyleDomModifier = new GlobalDocumentCursorStyleDomModifier(),
+  onTeardown: LifecycleHook = onUnmounted,
 ) {
   const cursorStyle = createCursorStyle(cursorCssValue, documentAccessor);
 
@@ -15,7 +17,7 @@ export function useGlobalCursor(
     }
   });
 
-  onUnmounted(() => {
+  onTeardown(() => {
     documentAccessor.removeElement(cursorStyle);
   });
 }

src/presentation/components/Shared/Hooks/Common/LifecycleHook.ts

@@ -0,0 +1,8 @@
+/*
+  These types are used to abstract Vue Lifecycle injection APIs
+  (e.g., onBeforeMount, onUnmount) for better testability.
+*/
+
+export type LifecycleHook = (callback: LifecycleHookCallback) => void;
+
+export type LifecycleHookCallback = () => void;

src/presentation/components/Shared/Hooks/Resize/UseResizeObserver.ts

@@ -5,14 +5,15 @@ import {
 import { throttle, type ThrottleFunction } from '@/application/Common/Timing/Throttle';
 import { useResizeObserverPolyfill } from './UseResizeObserverPolyfill';
 import { useAnimationFrameLimiter } from './UseAnimationFrameLimiter';
+import type { LifecycleHook } from '../Common/LifecycleHook';
 
 export function useResizeObserver(
   config: ResizeObserverConfig,
   usePolyfill = useResizeObserverPolyfill,
   useFrameLimiter = useAnimationFrameLimiter,
   throttler: ThrottleFunction = throttle,
-  onSetup: LifecycleHookRegistration = onBeforeMount,
-  onTeardown: LifecycleHookRegistration = onBeforeUnmount,
+  onSetup: LifecycleHook = onBeforeMount,
+  onTeardown: LifecycleHook = onBeforeUnmount,
 ) {
   const { resetNextFrame, cancelNextFrame } = useFrameLimiter();
   // This prevents the 'ResizeObserver loop completed with undelivered notifications' error when
@@ -63,5 +64,3 @@ export interface ResizeObserverConfig {
 }
 
 export type ObservedElementReference = Readonly<Ref<HTMLElement | undefined>>;
-
-export type LifecycleHookRegistration = (callback: () => void) => void;

src/presentation/components/Shared/Hooks/UseAutoUnsubscribedEventListener.ts

@@ -4,12 +4,17 @@ import {
   watch,
   type Ref,
 } from 'vue';
+import type { LifecycleHook } from './Common/LifecycleHook';
 
 export interface UseEventListener {
-  (): TargetEventListener;
+  (
+    onTeardown?: LifecycleHook,
+  ): TargetEventListener;
 }
 
-export const useAutoUnsubscribedEventListener: UseEventListener = () => ({
+export const useAutoUnsubscribedEventListener: UseEventListener = (
+  onTeardown = onBeforeUnmount,
+) => ({
   startListening: (eventTargetSource, eventType, eventHandler) => {
     const eventTargetRef = isEventTarget(eventTargetSource)
       ? shallowRef(eventTargetSource)
@@ -18,6 +23,7 @@ export const useAutoUnsubscribedEventListener: UseEventListener = () => ({
       eventTargetRef,
       eventType,
       eventHandler,
+      onTeardown,
     );
   },
 });
@@ -42,6 +48,7 @@ function startListeningRef<TEvent extends keyof HTMLElementEventMap>(
   eventTargetRef: Readonly<Ref<EventTarget | undefined>>,
   eventType: TEvent,
   eventHandler: (event: HTMLElementEventMap[TEvent]) => void,
+  onTeardown: LifecycleHook,
 ): void {
   const eventListenerManager = new EventListenerManager();
   watch(() => eventTargetRef.value, (element) => {
@@ -52,7 +59,7 @@ function startListeningRef<TEvent extends keyof HTMLElementEventMap>(
     eventListenerManager.addListener(element, eventType, eventHandler);
   }, { immediate: true });
 
-  onBeforeUnmount(() => {
+  onTeardown(() => {
     eventListenerManager.removeListenerIfExists();
   });
 }

src/presentation/components/Shared/Hooks/UseAutoUnsubscribedEvents.ts

@@ -1,15 +1,17 @@
 import { onUnmounted } from 'vue';
 import { EventSubscriptionCollection } from '@/infrastructure/Events/EventSubscriptionCollection';
 import type { IEventSubscriptionCollection } from '@/infrastructure/Events/IEventSubscriptionCollection';
+import type { LifecycleHook } from './Common/LifecycleHook';
 
 export function useAutoUnsubscribedEvents(
   events: IEventSubscriptionCollection = new EventSubscriptionCollection(),
+  onTeardown: LifecycleHook = onUnmounted,
 ) {
   if (events.subscriptionCount > 0) {
     throw new Error('there are existing subscriptions, this may lead to side-effects');
   }
 
-  onUnmounted(() => {
+  onTeardown(() => {
     events.unsubscribeAll();
   });
 

tests/integration/composite/DependencyResolution.spec.ts

@@ -1,10 +1,10 @@
 import { it, describe, expect } from 'vitest';
-import { shallowMount } from '@vue/test-utils';
-import { defineComponent, inject } from 'vue';
+import { inject } from 'vue';
 import { type InjectionKeySelector, InjectionKeys, injectKey } from '@/presentation/injectionSymbols';
 import { provideDependencies } from '@/presentation/bootstrapping/DependencyProvider';
 import { buildContext } from '@/application/Context/ApplicationContextFactory';
 import type { IApplicationContext } from '@/application/Context/IApplicationContext';
+import { executeInComponentSetupContext } from '@tests/shared/Vue/ExecuteInComponentSetupContext';
 
 describe('DependencyResolution', () => {
   describe('all dependencies can be injected', async () => {
@@ -16,7 +16,7 @@ describe('DependencyResolution', () => {
         // act
         const resolvedDependency = resolve(() => key, dependencies);
         // assert
-        expect(resolvedDependency).to.toBeDefined();
+        expect(resolvedDependency).toBeDefined();
       });
     });
   });
@@ -40,13 +40,14 @@ function resolve<T>(
   providedKeys: ProvidedKeys,
 ): T | undefined {
   let injectedDependency: T | undefined;
-  shallowMount(defineComponent({
-    setup() {
+  executeInComponentSetupContext({
+    setupCallback: () => {
       injectedDependency = injectKey(selector);
     },
-  }), {
-    global: {
-      provide: providedKeys,
+    mountOptions: {
+      global: {
+        provide: providedKeys,
+      },
     },
   });
   return injectedDependency;

tests/integration/presentation/components/Scripts/View/Tree/Shared/Icon/UseSvgLoader.spec.ts

@@ -3,7 +3,7 @@ import {
 } from 'vitest';
 import { IconNames } from '@/presentation/components/Shared/Icon/IconName';
 import { useSvgLoader } from '@/presentation/components/Shared/Icon/UseSvgLoader';
-import { waitForValueChange } from '@tests/shared/WaitForValueChange';
+import { waitForValueChange } from '@tests/shared/Vue/WaitForValueChange';
 
 describe('useSvgLoader', () => {
   describe('can load all SVGs', () => {

tests/integration/presentation/components/Scripts/View/Tree/TreeView/Node/UseKeyboardInteractionState.spec.ts

@@ -1,8 +1,7 @@
 import { describe, it, expect } from 'vitest';
-import { shallowMount } from '@vue/test-utils';
-import { defineComponent } from 'vue';
 import { useKeyboardInteractionState } from '@/presentation/components/Scripts/View/Tree/TreeView/Node/UseKeyboardInteractionState';
 import { expectExists } from '@tests/shared/Assertions/ExpectExists';
+import { executeInComponentSetupContext } from '@tests/shared/Vue/ExecuteInComponentSetupContext';
 
 describe('useKeyboardInteractionState', () => {
   describe('isKeyboardBeingUsed', () => {
@@ -49,12 +48,12 @@ function triggerKeyPress() {
 
 function mountWrapperComponent() {
   let returnObject: ReturnType<typeof useKeyboardInteractionState> | undefined;
-  const wrapper = shallowMount(defineComponent({
-    setup() {
+  const wrapper = executeInComponentSetupContext({
+    setupCallback: () => {
       returnObject = useKeyboardInteractionState();
     },
-    template: '<div></div>',
-  }));
+    disableAutoUnmount: true,
+  });
   expectExists(returnObject);
   return {
     returnObject,

tests/shared/Vue/ExecuteInComponentSetupContext.ts

@@ -0,0 +1,27 @@
+import { shallowMount, type ComponentMountingOptions } from '@vue/test-utils';
+import { defineComponent } from 'vue';
+
+type MountOptions = ComponentMountingOptions<unknown>;
+
+/**
+ * A test helper utility that provides a component `setup()` context.
+ * This function allows running code that depends on Vue lifecycle hooks,
+ * such as `onMounted`, within a component's `setup` function.
+ */
+export function executeInComponentSetupContext(options: {
+  readonly setupCallback: () => void;
+  readonly disableAutoUnmount?: boolean;
+  readonly mountOptions?: MountOptions,
+}): ReturnType<typeof shallowMount> {
+  const componentWrapper = shallowMount(defineComponent({
+    setup() {
+      options.setupCallback();
+    },
+    // Component requires a template or render function
+    template: '<div>Test Component: setup context</div>',
+  }), options.mountOptions);
+  if (!options.disableAutoUnmount) {
+    componentWrapper.unmount(); // Ensure cleanup of callback tasks
+  }
+  return componentWrapper;
+}

tests/shared/bootstrap/FailTestOnConsoleError.ts

@@ -0,0 +1,23 @@
+import {
+  beforeEach, afterEach, vi, expect,
+} from 'vitest';
+import type { FunctionKeys } from '@/TypeHelpers';
+
+export function failTestOnConsoleError() {
+  const consoleMethodsToCheck: readonly FunctionKeys<Console>[] = [
+    'warn',
+    'error',
+  ];
+
+  beforeEach(() => {
+    consoleMethodsToCheck.forEach((methodName) => {
+      vi.spyOn(console, methodName).mockClear();
+    });
+  });
+
+  afterEach(() => {
+    consoleMethodsToCheck.forEach((methodName) => {
+      expect(console[methodName]).not.toHaveBeenCalled();
+    });
+  });
+}

tests/shared/bootstrap/setup.ts

@@ -1,6 +1,8 @@
 import { afterEach } from 'vitest';
 import { enableAutoUnmount } from '@vue/test-utils';
 import { polyfillBlob } from './BlobPolyfill';
+import { failTestOnConsoleError } from './FailTestOnConsoleError';
 
 enableAutoUnmount(afterEach);
 polyfillBlob();
+failTestOnConsoleError();

tests/unit/presentation/bootstrapping/DependencyProvider.spec.ts

@@ -6,6 +6,7 @@ import { ApplicationContextStub } from '@tests/unit/shared/Stubs/ApplicationCont
 import { itIsSingletonFactory } from '@tests/unit/shared/TestCases/SingletonFactoryTests';
 import type { IApplicationContext } from '@/application/Context/IApplicationContext';
 import { itIsTransientFactory } from '@tests/unit/shared/TestCases/TransientFactoryTests';
+import { executeInComponentSetupContext } from '@tests/shared/Vue/ExecuteInComponentSetupContext';
 
 describe('DependencyProvider', () => {
   describe('provideDependencies', () => {
@@ -55,9 +56,14 @@ function createTransientTests() {
         .provideDependencies();
       // act
       const getFactoryResult = () => {
-        const registeredObject = api.inject(injectionKey);
-        const factory = registeredObject as () => unknown;
-        return factory();
+        const registeredFactory = api.inject(injectionKey) as () => unknown;
+        let factoryResult: unknown;
+        executeInComponentSetupContext({
+          setupCallback: () => {
+            factoryResult = registeredFactory();
+          },
+        });
+        return factoryResult;
       };
       // assert
       itIsTransientFactory({
@@ -97,6 +103,7 @@ function createSingletonTests() {
     });
   };
 }
+
 class ProvideDependenciesBuilder {
   private context: IApplicationContext = new ApplicationContextStub();
 

tests/unit/presentation/components/Scripts/Menu/Recommendation/Rating/CircleRating.spec.ts

@@ -13,23 +13,10 @@ describe('CircleRating.vue', () => {
       const currentRating = MAX_RATING - 1;
 
       // act
-      const wrapper = shallowMount(CircleRating, {
-        propsData: {
-          rating: currentRating,
-        },
+      const wrapper = mountComponent({
+        rating: currentRating,
       });
 
-      // assert
-      const ratingCircles = wrapper.findAllComponents(RatingCircle);
-      expect(ratingCircles.length).to.equal(expectedMaxRating);
-    });
-    it('renders the correct number of RatingCircle components for default rating', () => {
-      // arrange
-      const expectedMaxRating = MAX_RATING;
-
-      // act
-      const wrapper = shallowMount(CircleRating);
-
       // assert
       const ratingCircles = wrapper.findAllComponents(RatingCircle);
       expect(ratingCircles.length).to.equal(expectedMaxRating);
@@ -42,10 +29,8 @@ describe('CircleRating.vue', () => {
       const expectedTotalComponents = 3;
 
       // act
-      const wrapper = shallowMount(CircleRating, {
-        propsData: {
-          rating: expectedTotalComponents,
-        },
+      const wrapper = mountComponent({
+        rating: expectedTotalComponents,
       });
 
       // assert
@@ -87,3 +72,13 @@ describe('CircleRating.vue', () => {
     });
   });
 });
+
+function mountComponent(options: {
+  readonly rating: number,
+}) {
+  return shallowMount(CircleRating, {
+    props: {
+      rating: options.rating,
+    },
+  });
+}

tests/unit/presentation/components/Scripts/Slider/UseDragHandler.spec.ts

@@ -4,6 +4,8 @@ import { useDragHandler, type DragDomModifier } from '@/presentation/components/
 import { ThrottleStub } from '@tests/unit/shared/Stubs/ThrottleStub';
 import { type ThrottleFunction } from '@/application/Common/Timing/Throttle';
 import type { ConstructorArguments } from '@/TypeHelpers';
+import type { LifecycleHook } from '@/presentation/components/Shared/Hooks/Common/LifecycleHook';
+import { LifecycleHookStub } from '@tests/unit/shared/Stubs/LifecycleHookStub';
 
 describe('useDragHandler', () => {
   describe('initially', () => {
@@ -80,7 +82,7 @@ describe('useDragHandler', () => {
       const finalDragX = 150;
       const expectedDisplacementX = finalDragX - initialDragX;
       const mockElement = document.createElement('div');
-      const dragDomModifierMock = new DragDomModifierMock();
+      const dragDomModifierMock = createDragDomModifierMock();
 
       // act
       const { displacementX } = initializeDragHandlerWithMocks({
@@ -100,7 +102,7 @@ describe('useDragHandler', () => {
         'pointermove',
       ];
       const mockElement = document.createElement('div');
-      const dragDomModifierMock = new DragDomModifierMock();
+      const dragDomModifierMock = createDragDomModifierMock();
 
       // act
       initializeDragHandlerWithMocks({
@@ -153,7 +155,7 @@ describe('useDragHandler', () => {
         const expectedTotalThrottledEvents = 3;
         const throttleStub = new ThrottleStub();
         const mockElement = document.createElement('div');
-        const dragDomModifierMock = new DragDomModifierMock();
+        const dragDomModifierMock = createDragDomModifierMock();
 
         // act
         initializeDragHandlerWithMocks({
@@ -176,7 +178,7 @@ describe('useDragHandler', () => {
         const mockElement = document.createElement('div');
         const initialDragX = 100;
         const firstDisplacementX = 10;
-        const dragDomModifierMock = new DragDomModifierMock();
+        const dragDomModifierMock = createDragDomModifierMock();
 
         // act
         const { displacementX } = initializeDragHandlerWithMocks({
@@ -199,7 +201,7 @@ describe('useDragHandler', () => {
       // arrange
       const expectedDraggingState = false;
       const mockElement = document.createElement('div');
-      const dragDomModifierMock = new DragDomModifierMock();
+      const dragDomModifierMock = createDragDomModifierMock();
 
       // act
       const { isDragging } = initializeDragHandlerWithMocks({
@@ -215,7 +217,7 @@ describe('useDragHandler', () => {
     it('removes event listeners', () => {
       // arrange
       const mockElement = document.createElement('div');
-      const dragDomModifierMock = new DragDomModifierMock();
+      const dragDomModifierMock = createDragDomModifierMock();
 
       // act
       initializeDragHandlerWithMocks({
@@ -225,6 +227,27 @@ describe('useDragHandler', () => {
       mockElement.dispatchEvent(createMockPointerEvent('pointerdown', { clientX: 100 }));
       dragDomModifierMock.simulateEvent('pointerup', createMockPointerEvent('pointerup'));
 
+      // assert
+      const actualEvents = [...dragDomModifierMock.events];
+      expect(actualEvents).to.have.lengthOf(0);
+    });
+  });
+  describe('on teardown', () => {
+    it('removes event listeners', () => {
+      // arrange
+      const teardownHook = new LifecycleHookStub();
+      const mockElement = document.createElement('div');
+      const dragDomModifierMock = createDragDomModifierMock();
+
+      // act
+      initializeDragHandlerWithMocks({
+        draggableElementRef: ref(mockElement),
+        dragDomModifier: dragDomModifierMock,
+        onTeardown: teardownHook.getHook(),
+      });
+      mockElement.dispatchEvent(createMockPointerEvent('pointerdown', { clientX: 100 }));
+      teardownHook.executeAllCallbacks();
+
       // assert
       const actualEvents = [...dragDomModifierMock.events];
       expect(actualEvents).to.have.lengthOf(0);
@@ -236,11 +259,13 @@ function initializeDragHandlerWithMocks(mocks?: {
   readonly dragDomModifier?: DragDomModifier;
   readonly draggableElementRef?: Ref<HTMLElement>;
   readonly throttler?: ThrottleFunction,
+  readonly onTeardown?: LifecycleHook,
 }) {
   return useDragHandler(
     mocks?.draggableElementRef ?? ref(document.createElement('div')),
-    mocks?.dragDomModifier ?? new DragDomModifierMock(),
+    mocks?.dragDomModifier ?? createDragDomModifierMock(),
     mocks?.throttler ?? new ThrottleStub().withImmediateExecution(true).func,
+    mocks?.onTeardown ?? new LifecycleHookStub().getHook(),
   );
 }
 
@@ -248,22 +273,25 @@ function createMockPointerEvent(...args: ConstructorArguments<typeof PointerEven
   return new MouseEvent(...args) as PointerEvent; // jsdom does not support `PointerEvent` constructor, https://github.com/jsdom/jsdom/issues/2527
 }
 
-class DragDomModifierMock implements DragDomModifier {
-  public events = new Map<keyof DocumentEventMap, EventListener>();
-
-  public addEventListenerToDocument(type: keyof DocumentEventMap, handler: EventListener): void {
-    this.events.set(type, handler);
-  }
-
-  public removeEventListenerFromDocument(type: keyof DocumentEventMap): void {
-    this.events.delete(type);
-  }
-
-  public simulateEvent(type: keyof DocumentEventMap, event: Event) {
-    const handler = this.events.get(type);
-    if (!handler) {
-      throw new Error(`No event handler registered for: ${type}`);
-    }
-    handler(event);
-  }
+function createDragDomModifierMock(): DragDomModifier & {
+  simulateEvent(type: keyof DocumentEventMap, event: Event): void;
+  readonly events: Map<keyof DocumentEventMap, EventListener>;
+} {
+  const events = new Map<keyof DocumentEventMap, EventListener>();
+  return {
+    addEventListenerToDocument: (type, handler) => {
+      events.set(type, handler);
+    },
+    removeEventListenerFromDocument: (type) => {
+      events.delete(type);
+    },
+    simulateEvent: (type, event) => {
+      const handler = events.get(type);
+      if (!handler) {
+        throw new Error(`No event handler registered for: ${type}`);
+      }
+      handler(event);
+    },
+    events,
+  };
 }

tests/unit/presentation/components/Scripts/Slider/UseGlobalCursor.spec.ts

@@ -1,23 +1,25 @@
 import { it, describe, expect } from 'vitest';
 import {
-  type Ref, ref, defineComponent, nextTick,
+  type Ref, ref, nextTick,
 } from 'vue';
-import { shallowMount } from '@vue/test-utils';
 import { type CursorStyleDomModifier, useGlobalCursor } from '@/presentation/components/Scripts/Slider/UseGlobalCursor';
+import type { LifecycleHook } from '@/presentation/components/Shared/Hooks/Common/LifecycleHook';
+import { LifecycleHookStub } from '@tests/unit/shared/Stubs/LifecycleHookStub';
 
 describe('useGlobalCursor', () => {
   it('adds cursor style to head on activation', async () => {
     // arrange
     const expectedCursorCssStyleValue = 'pointer';
     const isActive = ref(false);
+    const domModifier = new CursorStyleDomModifierStub();
 
     // act
-    const { cursorStyleDomModifierMock } = createHookWithStubs({ isActive });
+    createHookWithStubs({ isActive, domModifier });
     isActive.value = true;
     await nextTick();
 
     // assert
-    const { elementsAppendedToHead: appendedElements } = cursorStyleDomModifierMock;
+    const { elementsAppendedToHead: appendedElements } = domModifier;
     expect(appendedElements.length).to.equal(1);
     expect(appendedElements[0].innerHTML).toContain(expectedCursorCssStyleValue);
   });
@@ -25,75 +27,61 @@ describe('useGlobalCursor', () => {
   it('removes cursor style from head on deactivation', async () => {
     // arrange
     const isActive = ref(true);
+    const domModifier = new CursorStyleDomModifierStub();
 
     // act
-    const { cursorStyleDomModifierMock } = createHookWithStubs({ isActive });
+    createHookWithStubs({ isActive, domModifier });
     await nextTick();
     isActive.value = false;
     await nextTick();
 
     // assert
-    expect(cursorStyleDomModifierMock.elementsRemovedFromHead.length).to.equal(1);
+    expect(domModifier.elementsRemovedFromHead.length).to.equal(1);
   });
 
   it('cleans up cursor style on unmount', async () => {
     // arrange
     const isActive = ref(true);
+    const domModifier = new CursorStyleDomModifierStub();
+    const onTeardown = new LifecycleHookStub();
 
     // act
-    const { wrapper, returnObject } = mountWrapperComponent({ isActive });
-    wrapper.unmount();
+    createHookWithStubs({ isActive, domModifier, onTeardown: onTeardown.getHook() });
+    onTeardown.executeAllCallbacks();
     await nextTick();
 
     // assert
-    const { cursorStyleDomModifierMock } = returnObject;
-    expect(cursorStyleDomModifierMock.elementsRemovedFromHead.length).to.equal(1);
+    expect(onTeardown.totalRegisteredCallbacks).to.be.greaterThan(0);
+    expect(domModifier.elementsRemovedFromHead.length).to.equal(1);
   });
 
   it('does not append style to head when initially inactive', async () => {
     // arrange
     const isActive = ref(false);
+    const domModifier = new CursorStyleDomModifierStub();
 
     // act
-    const { cursorStyleDomModifierMock } = createHookWithStubs({ isActive });
+    createHookWithStubs({ isActive, domModifier });
     await nextTick();
 
     // assert
-    expect(cursorStyleDomModifierMock.elementsAppendedToHead.length).toBe(0);
+    expect(domModifier.elementsAppendedToHead.length).toBe(0);
   });
 });
 
-function mountWrapperComponent(...hookOptions: Parameters<typeof createHookWithStubs>) {
-  let returnObject: ReturnType<typeof createHookWithStubs> | undefined;
-  const wrapper = shallowMount(
-    defineComponent({
-      setup() {
-        returnObject = createHookWithStubs(...hookOptions);
-      },
-      template: '<div></div>',
-    }),
-  );
-  if (!returnObject) {
-    throw new Error('missing hook result');
-  }
-  return {
-    wrapper,
-    returnObject,
-  };
-}
-
 function createHookWithStubs(options?: {
   readonly isActive?: Ref<boolean>;
   readonly expectedCursorCssStyleValue?: string;
+  readonly domModifier?: CursorStyleDomModifier;
+  readonly onTeardown?: LifecycleHook;
 }) {
-  const cursorStyleDomModifierMock = new CursorStyleDomModifierStub();
   const hookResult = useGlobalCursor(
     options?.isActive ?? ref(true),
     options?.expectedCursorCssStyleValue ?? 'pointer',
-    cursorStyleDomModifierMock,
+    options?.domModifier ?? new CursorStyleDomModifierStub(),
+    options?.onTeardown ?? new LifecycleHookStub().getHook(),
   );
   return {
-    cursorStyleDomModifierMock,
     hookResult,
   };
 }

tests/unit/presentation/components/Scripts/View/Tree/TreeView/UseNodeStateChangeAggregator.spec.ts

@@ -24,7 +24,7 @@ describe('useNodeStateChangeAggregator', () => {
     // arrange
     const expectedTreeRootRef = shallowRef(new TreeRootStub());
     const currentTreeNodesStub = new UseCurrentTreeNodesStub();
-    const builder = new UseNodeStateChangeAggregatorBuilder()
+    const builder = new TestContext()
       .withCurrentTreeNodes(currentTreeNodesStub.get())
       .withTreeRootRef(expectedTreeRootRef);
     // act
@@ -61,7 +61,7 @@ describe('useNodeStateChangeAggregator', () => {
             // arrange
             const nodesStub = new UseCurrentTreeNodesStub()
               .withQueryableNodes(createFlatCollection(expectedNodes));
-            const { returnObject } = new UseNodeStateChangeAggregatorBuilder()
+            const { returnObject } = new TestContext()
               .withCurrentTreeNodes(nodesStub.get())
               .mountWrapperComponent();
             const { callback, calledArgs } = createSpyingCallback();
@@ -81,7 +81,7 @@ describe('useNodeStateChangeAggregator', () => {
           it(description, async () => {
             // arrange
             const nodesStub = new UseCurrentTreeNodesStub();
-            const { returnObject } = new UseNodeStateChangeAggregatorBuilder()
+            const { returnObject } = new TestContext()
               .withCurrentTreeNodes(nodesStub.get())
               .mountWrapperComponent();
             const { callback, calledArgs } = createSpyingCallback();
@@ -104,7 +104,7 @@ describe('useNodeStateChangeAggregator', () => {
             // arrange
             const nodesStub = new UseCurrentTreeNodesStub()
               .withQueryableNodes(createFlatCollection(expectedNodes));
-            const { returnObject } = new UseNodeStateChangeAggregatorBuilder()
+            const { returnObject } = new TestContext()
               .withCurrentTreeNodes(nodesStub.get())
               .mountWrapperComponent();
             const { callback, calledArgs } = createSpyingCallback();
@@ -167,7 +167,7 @@ describe('useNodeStateChangeAggregator', () => {
               .withQueryableNodes(createFlatCollection(initialNodes));
             const nodeState = new TreeNodeStateAccessStub();
             changedNode.withState(nodeState);
-            const { returnObject } = new UseNodeStateChangeAggregatorBuilder()
+            const { returnObject } = new TestContext()
               .withCurrentTreeNodes(nodesStub.get())
               .mountWrapperComponent();
             const { callback, calledArgs } = createSpyingCallback();
@@ -216,7 +216,7 @@ describe('useNodeStateChangeAggregator', () => {
         const nodesStub = new UseCurrentTreeNodesStub()
           .withQueryableNodes(createFlatCollection(initialNodes));
         const eventsStub = new UseAutoUnsubscribedEventsStub();
-        const { returnObject } = new UseNodeStateChangeAggregatorBuilder()
+        const { returnObject } = new TestContext()
           .withCurrentTreeNodes(nodesStub.get())
           .withEventsStub(eventsStub)
           .mountWrapperComponent();
@@ -290,7 +290,7 @@ function createFlatCollection(nodes: readonly TreeNode[]): QueryableNodesStub {
   return new QueryableNodesStub().withFlattenedNodes(nodes);
 }
 
-class UseNodeStateChangeAggregatorBuilder {
+class TestContext {
   private treeRootRef: Readonly<Ref<TreeRoot>> = shallowRef(new TreeRootStub());
 
   private currentTreeNodes: typeof useCurrentTreeNodes = new UseCurrentTreeNodesStub().get();

tests/unit/presentation/components/Shared/Hooks/UseAutoUnsubscribedEventListener.spec.ts

@@ -1,9 +1,9 @@
 import { describe, it, expect } from 'vitest';
-import { shallowMount } from '@vue/test-utils';
 import { nextTick, shallowRef } from 'vue';
 import { useAutoUnsubscribedEventListener } from '@/presentation/components/Shared/Hooks/UseAutoUnsubscribedEventListener';
-import { expectExists } from '@tests/shared/Assertions/ExpectExists';
 import { expectDoesNotThrowAsync } from '@tests/shared/Assertions/ExpectThrowsAsync';
+import type { LifecycleHook } from '@/presentation/components/Shared/Hooks/Common/LifecycleHook';
+import { LifecycleHookStub } from '@tests/unit/shared/Stubs/LifecycleHookStub';
 
 describe('UseAutoUnsubscribedEventListener', () => {
   describe('startListening', () => {
@@ -17,9 +17,10 @@ describe('UseAutoUnsubscribedEventListener', () => {
         const callback = (event: Event) => {
           actualEvent = event;
         };
+        const context = new TestContext();
         // act
-        const { returnObject } = mountWrapper();
-        returnObject.startListening(eventTarget, eventType, callback);
+        const { startListening } = context.use();
+        startListening(eventTarget, eventType, callback);
         eventTarget.dispatchEvent(expectedEvent);
         // assert
         expect(actualEvent).to.equal(expectedEvent);
@@ -33,13 +34,16 @@ describe('UseAutoUnsubscribedEventListener', () => {
         };
         const eventTarget = new EventTarget();
         const eventType: keyof HTMLElementEventMap = 'abort';
+        const teardownHook = new LifecycleHookStub();
+        const context = new TestContext()
+          .withOnTeardown(teardownHook.getHook());
         // act
-        const { wrapper } = mountWrapper({
-          setup: (listener) => listener.startListening(eventTarget, eventType, callback),
-        });
-        wrapper.unmount();
+        const { startListening } = context.use();
+        startListening(eventTarget, eventType, callback);
+        teardownHook.executeAllCallbacks();
         eventTarget.dispatchEvent(new CustomEvent(eventType));
         // assert
+        expect(teardownHook.totalRegisteredCallbacks).to.greaterThan(0);
         expect(isCallbackCalled).to.equal(expectedCallbackCall);
       });
     });
@@ -54,9 +58,10 @@ describe('UseAutoUnsubscribedEventListener', () => {
         const callback = (event: Event) => {
           actualEvent = event;
         };
+        const context = new TestContext();
         // act
-        const { returnObject } = mountWrapper();
-        returnObject.startListening(eventTargetRef, eventType, callback);
+        const { startListening } = context.use();
+        startListening(eventTargetRef, eventType, callback);
         eventTarget.dispatchEvent(expectedEvent);
         // assert
         expect(actualEvent).to.equal(expectedEvent);
@@ -72,9 +77,10 @@ describe('UseAutoUnsubscribedEventListener', () => {
         const callback = (event: Event) => {
           actualEvent = event;
         };
+        const context = new TestContext();
         // act
-        const { returnObject } = mountWrapper();
-        returnObject.startListening(targetRef, eventType, callback);
+        const { startListening } = context.use();
+        startListening(targetRef, eventType, callback);
         targetRef.value = newValue;
         await nextTick();
         newValue.dispatchEvent(expectedEvent);
@@ -84,10 +90,11 @@ describe('UseAutoUnsubscribedEventListener', () => {
       it('does not throw if initial element is undefined', () => {
         // arrange
         const targetRef = shallowRef(undefined);
+        const context = new TestContext();
         // act
-        const { returnObject } = mountWrapper();
+        const { startListening } = context.use();
         const act = () => {
-          returnObject.startListening(targetRef, 'abort', () => { /* NO OP */ });
+          startListening(targetRef, 'abort', () => { /* NO OP */ });
         };
         // assert
         expect(act).to.not.throw();
@@ -95,9 +102,10 @@ describe('UseAutoUnsubscribedEventListener', () => {
       it('does not throw when reference becomes undefined', async () => {
         // arrange
         const targetRef = shallowRef<EventTarget | undefined>(new EventTarget());
+        const context = new TestContext();
         // act
-        const { returnObject } = mountWrapper();
-        returnObject.startListening(targetRef, 'abort', () => { /* NO OP */ });
+        const { startListening } = context.use();
+        startListening(targetRef, 'abort', () => { /* NO OP */ });
         const act = async () => {
           targetRef.value = undefined;
           await nextTick();
@@ -117,9 +125,10 @@ describe('UseAutoUnsubscribedEventListener', () => {
         const targetRef = shallowRef(oldValue);
         const eventType: keyof HTMLElementEventMap = 'abort';
         const expectedEvent = new CustomEvent(eventType);
+        const context = new TestContext();
         // act
-        const { returnObject } = mountWrapper();
-        returnObject.startListening(targetRef, eventType, callback);
+        const { startListening } = context.use();
+        startListening(targetRef, eventType, callback);
         targetRef.value = newValue;
         await nextTick();
         oldValue.dispatchEvent(expectedEvent);
@@ -136,11 +145,13 @@ describe('UseAutoUnsubscribedEventListener', () => {
         const target = new EventTarget();
         const targetRef = shallowRef(target);
         const eventType: keyof HTMLElementEventMap = 'abort';
+        const teardownHook = new LifecycleHookStub();
+        const context = new TestContext()
+          .withOnTeardown(teardownHook.getHook());
         // act
-        const { wrapper } = mountWrapper({
-          setup: (listener) => listener.startListening(targetRef, eventType, callback),
-        });
-        wrapper.unmount();
+        const { startListening } = context.use();
+        startListening(targetRef, eventType, callback);
+        teardownHook.executeAllCallbacks();
         target.dispatchEvent(new CustomEvent(eventType));
         // assert
         expect(isCallbackCalled).to.equal(expectedCallbackCall);
@@ -149,24 +160,18 @@ describe('UseAutoUnsubscribedEventListener', () => {
   });
 });
 
-function mountWrapper(options?: {
-  readonly constructorArgs?: Parameters<typeof useAutoUnsubscribedEventListener>,
-  /** Running inside `setup` allows simulating lifecycle events like unmounting. */
-  readonly setup?: (returnObject: ReturnType<typeof useAutoUnsubscribedEventListener>) => void,
-}) {
-  let returnObject: ReturnType<typeof useAutoUnsubscribedEventListener> | undefined;
-  const wrapper = shallowMount({
-    setup() {
-      returnObject = useAutoUnsubscribedEventListener(...(options?.constructorArgs ?? []));
-      if (options?.setup) {
-        options.setup(returnObject);
-      }
-    },
-    template: '<div></div>',
-  });
-  expectExists(returnObject);
-  return {
-    wrapper,
-    returnObject,
-  };
+class TestContext {
+  private onTeardown: LifecycleHook = new LifecycleHookStub()
+    .getHook();
+
+  public withOnTeardown(onTeardown: LifecycleHook): this {
+    this.onTeardown = onTeardown;
+    return this;
+  }
+
+  public use(): ReturnType<typeof useAutoUnsubscribedEventListener> {
+    return useAutoUnsubscribedEventListener(
+      this.onTeardown,
+    );
+  }
 }

tests/unit/presentation/components/Shared/Hooks/UseAutoUnsubscribedEvents.spec.ts

@@ -1,43 +1,38 @@
 import { describe, it, expect } from 'vitest';
-import { shallowMount } from '@vue/test-utils';
 import { useAutoUnsubscribedEvents } from '@/presentation/components/Shared/Hooks/UseAutoUnsubscribedEvents';
 import { EventSubscriptionCollectionStub } from '@tests/unit/shared/Stubs/EventSubscriptionCollectionStub';
 import { EventSubscriptionStub } from '@tests/unit/shared/Stubs/EventSubscriptionStub';
 import { EventSubscriptionCollection } from '@/infrastructure/Events/EventSubscriptionCollection';
 import type { FunctionKeys } from '@/TypeHelpers';
+import type { LifecycleHook } from '@/presentation/components/Shared/Hooks/Common/LifecycleHook';
+import { LifecycleHookStub } from '@tests/unit/shared/Stubs/LifecycleHookStub';
+import type { IEventSubscriptionCollection } from '@/infrastructure/Events/IEventSubscriptionCollection';
 
 describe('UseAutoUnsubscribedEvents', () => {
   describe('event collection handling', () => {
     it('returns the provided event collection when initialized', () => {
       // arrange
       const expectedEvents = new EventSubscriptionCollectionStub();
+      const context = new TestContext()
+        .withEvents(expectedEvents);
 
       // act
-      const { events: actualEvents } = useAutoUnsubscribedEvents(expectedEvents);
+      const { events: actualEvents } = context.use();
 
       // assert
       expect(actualEvents).to.equal(expectedEvents);
     });
 
-    it('uses a default event collection when none is provided during initialization', () => {
-      // arrange
-      const expectedType = EventSubscriptionCollection;
-
-      // act
-      const { events: actualEvents } = useAutoUnsubscribedEvents();
-
-      // assert
-      expect(actualEvents).to.be.instanceOf(expectedType);
-    });
-
     it('throws error when there are existing subscriptions', () => {
       // arrange
       const expectedError = 'there are existing subscriptions, this may lead to side-effects';
       const events = new EventSubscriptionCollectionStub();
       events.register([new EventSubscriptionStub(), new EventSubscriptionStub()]);
+      const context = new TestContext()
+        .withEvents(events);
 
       // act
-      const act = () => useAutoUnsubscribedEvents(events);
+      const act = () => context.use();
 
       // assert
       expect(act).to.throw(expectedError);
@@ -48,21 +43,44 @@ describe('UseAutoUnsubscribedEvents', () => {
       // arrange
       const events = new EventSubscriptionCollectionStub();
       const expectedCall: FunctionKeys<EventSubscriptionCollection> = 'unsubscribeAll';
-      const stubComponent = shallowMount({
-        setup() {
-          useAutoUnsubscribedEvents(events);
-          events.register([new EventSubscriptionStub(), new EventSubscriptionStub()]);
-        },
-        template: '<div></div>',
-      });
-      events.callHistory.length = 0;
+      const onTeardown = new LifecycleHookStub();
+      const context = new TestContext()
+        .withEvents(events)
+        .withOnTeardown(onTeardown.getHook());
 
       // act
-      stubComponent.unmount();
+      context.use();
+      events.register([new EventSubscriptionStub(), new EventSubscriptionStub()]);
+      events.callHistory.length = 0;
+      onTeardown.executeAllCallbacks();
 
       // assert
+      expect(onTeardown.totalRegisteredCallbacks).to.be.greaterThan(0);
       expect(events.callHistory).to.have.lengthOf(1);
       expect(events.callHistory[0].methodName).to.equal(expectedCall);
     });
   });
 });
+
+class TestContext {
+  private onTeardown: LifecycleHook = new LifecycleHookStub().getHook();
+
+  private events: IEventSubscriptionCollection = new EventSubscriptionCollectionStub();
+
+  public withOnTeardown(onTeardown: LifecycleHook): this {
+    this.onTeardown = onTeardown;
+    return this;
+  }
+
+  public withEvents(events: IEventSubscriptionCollection): this {
+    this.events = events;
+    return this;
+  }
+
+  public use(): ReturnType<typeof useAutoUnsubscribedEvents> {
+    return useAutoUnsubscribedEvents(
+      this.events,
+      this.onTeardown,
+    );
+  }
+}

tests/unit/presentation/components/Shared/Icon/UseSvgLoader.spec.ts

@@ -4,7 +4,7 @@ import {
 import { ref } from 'vue';
 import type { IconName } from '@/presentation/components/Shared/Icon/IconName';
 import { type FileLoaders, clearIconCache, useSvgLoader } from '@/presentation/components/Shared/Icon/UseSvgLoader';
-import { waitForValueChange } from '@tests/shared/WaitForValueChange';
+import { waitForValueChange } from '@tests/shared/Vue/WaitForValueChange';
 
 describe('useSvgLoader', () => {
   beforeEach(() => {

tests/unit/presentation/components/Shared/Modal/Hooks/ScrollLock/UseLockBodyBackgroundScroll.spec.ts

@@ -1,8 +1,8 @@
 import { describe, it, expect } from 'vitest';
-import { shallowMount } from '@vue/test-utils';
-import { ref, nextTick, defineComponent } from 'vue';
+import { ref, nextTick } from 'vue';
 import { useLockBodyBackgroundScroll } from '@/presentation/components/Shared/Modal/Hooks/ScrollLock/UseLockBodyBackgroundScroll';
 import type { ScrollDomStateAccessor } from '@/presentation/components/Shared/Modal/Hooks/ScrollLock/ScrollDomStateAccessor';
+import { executeInComponentSetupContext } from '@tests/shared/Vue/ExecuteInComponentSetupContext';
 import { DomStateChangeTestScenarios } from './DomStateChangeTestScenarios';
 
 describe('useLockBodyBackgroundScroll', () => {
@@ -13,7 +13,7 @@ describe('useLockBodyBackgroundScroll', () => {
         const isInitiallyActive = true;
 
         // act
-        createComponent(isInitiallyActive, dom);
+        mountWrapperComponent(isInitiallyActive, dom);
         await nextTick();
       });
     });
@@ -22,7 +22,7 @@ describe('useLockBodyBackgroundScroll', () => {
       const isInitiallyActive = false;
 
       // act
-      const { initialDomState, actualDomState } = createComponent(isInitiallyActive);
+      const { initialDomState, actualDomState } = mountWrapperComponent(isInitiallyActive);
       await nextTick();
 
       // assert
@@ -34,7 +34,7 @@ describe('useLockBodyBackgroundScroll', () => {
       itEachScrollBlockEffect(async (dom) => {
         // arrange
         const isInitiallyActive = false;
-        const { isActive } = createComponent(isInitiallyActive, dom);
+        const { isActive } = mountWrapperComponent(isInitiallyActive, dom);
 
         // act
         isActive.value = true;
@@ -44,7 +44,9 @@ describe('useLockBodyBackgroundScroll', () => {
     it('reverts to initial styles when deactivated', async () => {
       // arrange
       const isInitiallyActive = true;
-      const { isActive, initialDomState, actualDomState } = createComponent(isInitiallyActive);
+      const {
+        isActive, initialDomState, actualDomState,
+      } = mountWrapperComponent(isInitiallyActive);
 
       // act
       isActive.value = false;
@@ -57,7 +59,9 @@ describe('useLockBodyBackgroundScroll', () => {
   it('restores original styles on unmount', async () => {
     // arrange
     const isInitiallyActive = true;
-    const { component, initialDomState, actualDomState } = createComponent(isInitiallyActive);
+    const {
+      component, initialDomState, actualDomState,
+    } = mountWrapperComponent(isInitiallyActive);
 
     // act
     component.unmount();
@@ -68,19 +72,19 @@ describe('useLockBodyBackgroundScroll', () => {
   });
 });
 
-function createComponent(
+function mountWrapperComponent(
   initialIsActiveValue: boolean,
   dom?: ScrollDomStateAccessor,
 ) {
   const actualDomState = dom ?? createMockDomStateAccessor();
   const initialDomState = { ...actualDomState };
   const isActive = ref(initialIsActiveValue);
-  const component = shallowMount(defineComponent({
-    setup() {
+  const component = executeInComponentSetupContext({
+    setupCallback: () => {
       useLockBodyBackgroundScroll(isActive, actualDomState);
     },
-    template: '<div></div>',
-  }));
+    disableAutoUnmount: true,
+  });
   return {
     component, isActive, initialDomState, actualDomState,
   };

tests/unit/presentation/components/Shared/Modal/ModalContainer.spec.ts

@@ -182,7 +182,7 @@ function mountComponent(options: {
         },
         [COMPONENT_MODAL_CONTENT_NAME]: {
           name: COMPONENT_MODAL_CONTENT_NAME,
-          template: '<slot />',
+          template: '<div><slot /></div>',
         },
       },
     },

tests/unit/presentation/components/Shared/Resize/UseResizeObserver.spec.ts

@@ -1,9 +1,10 @@
 import { shallowRef } from 'vue';
-import { useResizeObserver, type LifecycleHookRegistration, type ObservedElementReference } from '@/presentation/components/Shared/Hooks/Resize/UseResizeObserver';
+import { useResizeObserver, type ObservedElementReference } from '@/presentation/components/Shared/Hooks/Resize/UseResizeObserver';
 import { flushPromiseResolutionQueue } from '@tests/unit/shared/PromiseInspection';
 import type { AnimationFrameLimiter } from '@/presentation/components/Shared/Hooks/Resize/UseAnimationFrameLimiter';
 import { ThrottleStub } from '@tests/unit/shared/Stubs/ThrottleStub';
-import { expectExists } from '@tests/shared/Assertions/ExpectExists';
+import type { LifecycleHook } from '@/presentation/components/Shared/Hooks/Common/LifecycleHook';
+import { LifecycleHookStub } from '@tests/unit/shared/Stubs/LifecycleHookStub';
 
 describe('UseResizeObserver', () => {
   it('registers observer once mounted', async () => {
@@ -30,18 +31,16 @@ describe('UseResizeObserver', () => {
     resizeObserverStub.disconnect = () => {
       isObserverDisconnected = true;
     };
-    let teardownCallback: (() => void) | undefined;
+    const teardownHook = new LifecycleHookStub();
     // act
     new TestContext()
       .withResizeObserver(resizeObserverStub)
-      .withOnTeardown((callback) => {
-        teardownCallback = callback;
-      })
+      .withOnTeardown(teardownHook.getHook())
       .useResizeObserver();
     await flushPromiseResolutionQueue();
-    expectExists(teardownCallback);
-    teardownCallback();
+    teardownHook.executeAllCallbacks();
     // assert
+    expect(teardownHook.totalRegisteredCallbacks).to.be.greaterThan(0);
     expect(isObserverDisconnected).to.equal(true);
   });
 });
@@ -66,9 +65,12 @@ class TestContext {
 
   private observedElementRef: ObservedElementReference = shallowRef(document.createElement('div'));
 
-  private onSetup: LifecycleHookRegistration = (callback) => { callback(); };
+  private onSetup: LifecycleHook = new LifecycleHookStub()
+    .withInvokeCallbackImmediately(true)
+    .getHook();
 
-  private onTeardown: LifecycleHookRegistration = () => { };
+  private onTeardown: LifecycleHook = new LifecycleHookStub()
+    .getHook();
 
   public withResizeObserver(resizeObserver: ResizeObserver): this {
     this.resizeObserver = resizeObserver;
@@ -80,12 +82,12 @@ class TestContext {
     return this;
   }
 
-  public withOnSetup(onSetup: LifecycleHookRegistration): this {
+  public withOnSetup(onSetup: LifecycleHook): this {
     this.onSetup = onSetup;
     return this;
   }
 
-  public withOnTeardown(onTeardown: LifecycleHookRegistration): this {
+  public withOnTeardown(onTeardown: LifecycleHook): this {
     this.onTeardown = onTeardown;
     return this;
   }

tests/unit/shared/Stubs/LifecycleHookStub.ts

@@ -0,0 +1,31 @@
+import type { LifecycleHookCallback, LifecycleHook } from '@/presentation/components/Shared/Hooks/Common/LifecycleHook';
+
+export class LifecycleHookStub {
+  private registeredCallbacks = new Array<LifecycleHookCallback>();
+
+  private invokeCallbackImmediately = false;
+
+  public withInvokeCallbackImmediately(callImmediatelyOnRegistration: boolean): this {
+    this.invokeCallbackImmediately = callImmediatelyOnRegistration;
+    return this;
+  }
+
+  public get totalRegisteredCallbacks(): number {
+    return this.registeredCallbacks.length;
+  }
+
+  public executeAllCallbacks() {
+    for (const callback of this.registeredCallbacks) {
+      callback();
+    }
+  }
+
+  public getHook(): LifecycleHook {
+    return (callback: LifecycleHookCallback) => {
+      this.registeredCallbacks.push(callback);
+      if (this.invokeCallbackImmediately) {
+        callback();
+      }
+    };
+  }
+}

tests/unit/shared/Stubs/VueDependencyInjectionApiStub.ts

@@ -9,6 +9,10 @@ export class VueDependencyInjectionApiStub implements VueDependencyInjectionApi
   }
 
   public inject<T>(key: InjectionKey<T>): T {
-    return this.injections.get(key) as T;
+    const providedValue = this.injections.get(key);
+    if (providedValue === undefined) {
+      throw new Error(`[VueDependencyInjectionApiStub] No value provided for key: ${String(key)}`);
+    }
+    return providedValue as T;
   }
 }