feat: add research decks with WebMCP controls

src/features/decks/use-deck.test.ts

@@ -0,0 +1,45 @@
+import { act, renderHook } from '@testing-library/react'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { EMPTY_DECK } from './model'
+import { DECK_STORAGE_KEY, useDeck } from './use-deck'
+
+beforeEach(() => {
+  localStorage.clear()
+  vi.restoreAllMocks()
+})
+
+describe('saved deck', () => {
+  it('restores saved conditions without overwriting them during mount', () => {
+    const saved = { ...EMPTY_DECK, title: 'WebMCP調査' }
+    localStorage.setItem(DECK_STORAGE_KEY, JSON.stringify(saved))
+    const { result } = renderHook(useDeck)
+    expect(result.current.ready).toBe(true)
+    expect(result.current.deck).toEqual(saved)
+    expect(JSON.parse(localStorage.getItem(DECK_STORAGE_KEY) ?? '')).toEqual(
+      saved,
+    )
+  })
+  it('keeps invalid saved data untouched and explains the failure', () => {
+    localStorage.setItem(DECK_STORAGE_KEY, '{broken')
+    const { result } = renderHook(useDeck)
+    expect(result.current.storageError).toContain('読み込めません')
+    expect(localStorage.getItem(DECK_STORAGE_KEY)).toBe('{broken')
+  })
+  it('persists edits and restores them on remount', () => {
+    const first = renderHook(useDeck)
+    act(() =>
+      first.result.current.save({ ...EMPTY_DECK, title: '保存した調査' }),
+    )
+    first.unmount()
+    expect(renderHook(useDeck).result.current.deck.title).toBe('保存した調査')
+  })
+  it('reports failed writes instead of claiming that changes were saved', () => {
+    vi.spyOn(Storage.prototype, 'setItem').mockImplementation(() => {
+      throw new Error('QuotaExceededError')
+    })
+    const { result } = renderHook(useDeck)
+    act(() => result.current.save({ ...EMPTY_DECK, title: '未保存' }))
+    expect(result.current.deck.title).toBe('未保存')
+    expect(result.current.storageError).toContain('保存できません')
+  })
+})