fix(storybook): prevent infinite remount of component (#14101)

* fix(storybook): prevent infinite remount of component

* fix: disable flaky `.toMatch()` test

7 files changed, 41 insertions, 92 deletions

diff --git a/packages/frontend/.storybook/preview.ts b/packages/frontend/.storybook/preview.ts
index 73ee007fb8..d000a28232 100644
--- a/packages/frontend/.storybook/preview.ts
+++ b/packages/frontend/.storybook/preview.ts
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { FORCE_REMOUNT } from '@storybook/core-events';
+import { FORCE_RE_RENDER, FORCE_REMOUNT } from '@storybook/core-events';
 import { addons } from '@storybook/preview-api';
 import { type Preview, setup } from '@storybook/vue3';
 import isChromatic from 'chromatic/isChromatic';
@@ -16,7 +16,7 @@ import '../src/style.scss';
 
 const appInitialized = Symbol();
 
-let lastStory = null;
+let lastStory: string | null = null;
 let moduleInitialized = false;
 let unobserve = () => {};
 let misskeyOS = null;
@@ -110,7 +110,7 @@ const preview = {
 				}).catch(() => {});
 				Promise.all([resetIndexedDBPromise, resetDefaultStorePromise]).then(() => {
 					initLocalStorage();
-					channel.emit(FORCE_REMOUNT, { storyId: context.id });
+					channel.emit(FORCE_RE_RENDER, { storyId: context.id });
 				});
 			}
 			const story = Story();
diff --git a/packages/frontend/src/components/MkChannelFollowButton.stories.impl.ts b/packages/frontend/src/components/MkChannelFollowButton.stories.impl.ts
index b99620da22..b9770670dc 100644
--- a/packages/frontend/src/components/MkChannelFollowButton.stories.impl.ts
+++ b/packages/frontend/src/components/MkChannelFollowButton.stories.impl.ts
@@ -12,14 +12,12 @@ import { expect, userEvent, within } from '@storybook/test';
 import { channel } from '../../.storybook/fakes.js';
 import { commonHandlers } from '../../.storybook/mocks.js';
 import MkChannelFollowButton from './MkChannelFollowButton.vue';
-import { semaphore } from '@/scripts/test-utils.js';
 import { i18n } from '@/i18n.js';
 
 function sleep(ms: number) {
 	return new Promise(resolve => setTimeout(resolve, ms));
 }
 
-const s = semaphore();
 export const Default = {
 	render(args) {
 		return {
@@ -46,17 +44,13 @@ export const Default = {
 		full: true,
 	},
 	async play({ canvasElement }) {
-		await s.acquire();
-		await sleep(1000);
 		const canvas = within(canvasElement);
 		const buttonElement = canvas.getByRole<HTMLButtonElement>('button');
 		await expect(buttonElement).toHaveTextContent(i18n.ts.follow);
 		await userEvent.click(buttonElement);
 		await sleep(1000);
 		await expect(buttonElement).toHaveTextContent(i18n.ts.unfollow);
-		await sleep(100);
 		await userEvent.click(buttonElement);
-		s.release();
 	},
 	parameters: {
 		layout: 'centered',
diff --git a/packages/frontend/src/components/MkClickerGame.stories.impl.ts b/packages/frontend/src/components/MkClickerGame.stories.impl.ts
index 8378010f8b..36313f965d 100644
--- a/packages/frontend/src/components/MkClickerGame.stories.impl.ts
+++ b/packages/frontend/src/components/MkClickerGame.stories.impl.ts
@@ -8,7 +8,7 @@
 import { StoryObj } from '@storybook/vue3';
 import { HttpResponse, http } from 'msw';
 import { action } from '@storybook/addon-actions';
-import { expect, within } from '@storybook/test';
+import { expect, userEvent, within } from '@storybook/test';
 import { commonHandlers } from '../../.storybook/mocks.js';
 import MkClickerGame from './MkClickerGame.vue';
 
@@ -41,12 +41,10 @@ export const Default = {
 		await sleep(1000);
 		const canvas = within(canvasElement);
 		const count = canvas.getByTestId('count');
-		// NOTE: flaky なので N/A も通しておく
-		await expect(count).toHaveTextContent(/^(0|N\/A)$/);
-		// FIXME: flaky
-		// const buttonElement = canvas.getByRole<HTMLButtonElement>('button');
-		// await userEvent.click(buttonElement);
-		// await expect(count).toHaveTextContent('1');
+		await expect(count).toHaveTextContent('0');
+		const buttonElement = canvas.getByRole<HTMLButtonElement>('button');
+		await userEvent.click(buttonElement);
+		await expect(count).toHaveTextContent('1');
 	},
 	parameters: {
 		layout: 'centered',
diff --git a/packages/frontend/src/components/MkCwButton.stories.impl.ts b/packages/frontend/src/components/MkCwButton.stories.impl.ts
index 05c6001552..5d6ea56da9 100644
--- a/packages/frontend/src/components/MkCwButton.stories.impl.ts
+++ b/packages/frontend/src/components/MkCwButton.stories.impl.ts
@@ -11,13 +11,6 @@ import { expect, userEvent, within } from '@storybook/test';
 import { file } from '../../.storybook/fakes.js';
 import MkCwButton from './MkCwButton.vue';
 import { i18n } from '@/i18n.js';
-import { semaphore } from '@/scripts/test-utils.js';
-
-function sleep(ms: number) {
-	return new Promise(resolve => setTimeout(resolve, ms));
-}
-
-const s = semaphore();
 
 export const Default = {
 	render(args) {
@@ -54,8 +47,6 @@ export const Default = {
 		text: 'Some CW content',
 	},
 	async play({ canvasElement }) {
-		await s.acquire();
-		await sleep(1000);
 		const canvas = within(canvasElement);
 		const buttonElement = canvas.getByRole<HTMLButtonElement>('button');
 		await expect(buttonElement).toHaveTextContent(i18n.ts._cw.show);
@@ -63,7 +54,6 @@ export const Default = {
 		await userEvent.click(buttonElement);
 		await expect(buttonElement).toHaveTextContent(i18n.ts._cw.hide);
 		await userEvent.click(buttonElement);
-		s.release();
 	},
 	parameters: {
 		chromatic: {
diff --git a/packages/frontend/src/components/global/MkA.stories.impl.ts b/packages/frontend/src/components/global/MkA.stories.impl.ts
index c1d8cf0ca6..02e5a7f98c 100644
--- a/packages/frontend/src/components/global/MkA.stories.impl.ts
+++ b/packages/frontend/src/components/global/MkA.stories.impl.ts
@@ -35,12 +35,10 @@ export const Default = {
 		// FIXME: 通るけどその後落ちるのでコメントアウト
 		// await expect(a.href).toMatch(/^https?:\/\/.*#test$/);
 		await userEvent.pointer({ keys: '[MouseRight]', target: a });
-		await tick();
 		const menu = canvas.getByRole('menu');
 		await expect(menu).toBeInTheDocument();
 		await userEvent.click(a);
 		a.blur();
-		await tick();
 		await expect(menu).not.toBeInTheDocument();
 	},
 	args: {
diff --git a/packages/frontend/src/components/global/MkAd.stories.impl.ts b/packages/frontend/src/components/global/MkAd.stories.impl.ts
index aef26ab92d..8c0b7ef52f 100644
--- a/packages/frontend/src/components/global/MkAd.stories.impl.ts
+++ b/packages/frontend/src/components/global/MkAd.stories.impl.ts
@@ -9,12 +9,6 @@ import { StoryObj } from '@storybook/vue3';
 import MkAd from './MkAd.vue';
 import { i18n } from '@/i18n.js';
 
-let lock: Promise<undefined> | undefined;
-
-function sleep(ms: number) {
-	return new Promise(resolve => setTimeout(resolve, ms));
-}
-
 const common = {
 	render(args) {
 		return {
@@ -37,56 +31,41 @@ const common = {
 		};
 	},
 	async play({ canvasElement, args }) {
-		if (lock) {
-			console.warn('This test is unexpectedly running twice in parallel, fix it!');
-			console.warn('See also: https://github.com/misskey-dev/misskey/issues/11267');
-			await lock;
+		const canvas = within(canvasElement);
+		const a = canvas.getByRole<HTMLAnchorElement>('link');
+		// FIXME: 通るけどその後落ちるのでコメントアウト
+		// await expect(a.href).toMatch(/^https?:\/\/.*#test$/);
+		const img = within(a).getByRole('img');
+		await expect(img).toBeInTheDocument();
+		let buttons = canvas.getAllByRole<HTMLButtonElement>('button');
+		await expect(buttons).toHaveLength(1);
+		const i = buttons[0];
+		await expect(i).toBeInTheDocument();
+		await userEvent.click(i);
+		await expect(canvasElement).toHaveTextContent(i18n.ts._ad.back);
+		await expect(a).not.toBeInTheDocument();
+		await expect(i).not.toBeInTheDocument();
+		buttons = canvas.getAllByRole<HTMLButtonElement>('button');
+		const hasReduceFrequency = args.specify?.ratio !== 0;
+		await expect(buttons).toHaveLength(hasReduceFrequency ? 2 : 1);
+		const reduce = hasReduceFrequency ? buttons[0] : null;
+		const back = buttons[hasReduceFrequency ? 1 : 0];
+		if (reduce) {
+			await expect(reduce).toBeInTheDocument();
+			await expect(reduce).toHaveTextContent(i18n.ts._ad.reduceFrequencyOfThisAd);
 		}
-
-		let resolve: (value?: any) => void;
-		lock = new Promise(r => resolve = r);
-
-		try {
-			// NOTE: sleep しないと何故か落ちる
-			await sleep(100);
-			const canvas = within(canvasElement);
-			const a = canvas.getByRole<HTMLAnchorElement>('link');
-			// await expect(a.href).toMatch(/^https?:\/\/.*#test$/);
-			const img = within(a).getByRole('img');
-			await expect(img).toBeInTheDocument();
-			let buttons = canvas.getAllByRole<HTMLButtonElement>('button');
-			await expect(buttons).toHaveLength(1);
-			const i = buttons[0];
-			await expect(i).toBeInTheDocument();
-			await userEvent.click(i);
-			await expect(canvasElement).toHaveTextContent(i18n.ts._ad.back);
-			await expect(a).not.toBeInTheDocument();
-			await expect(i).not.toBeInTheDocument();
-			buttons = canvas.getAllByRole<HTMLButtonElement>('button');
-			const hasReduceFrequency = args.specify?.ratio !== 0;
-			await expect(buttons).toHaveLength(hasReduceFrequency ? 2 : 1);
-			const reduce = hasReduceFrequency ? buttons[0] : null;
-			const back = buttons[hasReduceFrequency ? 1 : 0];
-			if (reduce) {
-				await expect(reduce).toBeInTheDocument();
-				await expect(reduce).toHaveTextContent(i18n.ts._ad.reduceFrequencyOfThisAd);
-			}
-			await expect(back).toBeInTheDocument();
-			await expect(back).toHaveTextContent(i18n.ts._ad.back);
-			await userEvent.click(back);
-			await waitFor(() => expect(canvas.queryByRole('img')).toBeTruthy());
-			if (reduce) {
-				await expect(reduce).not.toBeInTheDocument();
-			}
-			await expect(back).not.toBeInTheDocument();
-			const aAgain = canvas.getByRole<HTMLAnchorElement>('link');
-			await expect(aAgain).toBeInTheDocument();
-			const imgAgain = within(aAgain).getByRole('img');
-			await expect(imgAgain).toBeInTheDocument();
-		} finally {
-			resolve!();
-			lock = undefined;
+		await expect(back).toBeInTheDocument();
+		await expect(back).toHaveTextContent(i18n.ts._ad.back);
+		await userEvent.click(back);
+		await waitFor(() => expect(canvas.queryByRole('img')).toBeTruthy());
+		if (reduce) {
+			await expect(reduce).not.toBeInTheDocument();
 		}
+		await expect(back).not.toBeInTheDocument();
+		const aAgain = canvas.getByRole<HTMLAnchorElement>('link');
+		await expect(aAgain).toBeInTheDocument();
+		const imgAgain = within(aAgain).getByRole('img');
+		await expect(imgAgain).toBeInTheDocument();
 	},
 	args: {
 		prefer: [],
diff --git a/packages/frontend/src/scripts/test-utils.ts b/packages/frontend/src/scripts/test-utils.ts
index a32315f4df..52bb2d94e0 100644
--- a/packages/frontend/src/scripts/test-utils.ts
+++ b/packages/frontend/src/scripts/test-utils.ts
@@ -7,13 +7,3 @@ export async function tick(): Promise<void> {
 	// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
 	await new Promise((globalThis.requestIdleCallback ?? setTimeout) as never);
 }
-
-/**
- * @see https://github.com/misskey-dev/misskey/issues/11267
- */
-export function semaphore(counter = 0, waiting: (() => void)[] = []) {
-	return {
-		acquire: () => ++counter > 1 && new Promise<void>(resolve => waiting.push(resolve)),
-		release: () => --counter && waiting.pop()?.(),
-	};
-}