workflow caching cascade persistence

tests-ui/tests/platform/workflow/persistence/draftCache.test.ts

@@ -0,0 +1,77 @@
+import { describe, expect, it } from 'vitest'
+
+import {
+  MAX_DRAFTS,
+  type WorkflowDraftSnapshot,
+  createDraftCacheState,
+  mostRecentDraftPath,
+  moveDraft,
+  removeDraft,
+  touchEntry,
+  upsertDraft
+} from '@/platform/workflow/persistence/base/draftCache'
+
+const createSnapshot = (name: string): WorkflowDraftSnapshot => ({
+  data: JSON.stringify({ name }),
+  updatedAt: Date.now(),
+  name,
+  isTemporary: true
+})
+
+describe('draftCache helpers', () => {
+  it('touchEntry moves path to end', () => {
+    expect(touchEntry(['a', 'b'], 'a')).toEqual(['b', 'a'])
+    expect(touchEntry(['a', 'b'], 'c')).toEqual(['a', 'b', 'c'])
+  })
+
+  it('upsertDraft stores snapshot and applies LRU', () => {
+    let state = createDraftCacheState()
+    for (let i = 0; i < MAX_DRAFTS; i++) {
+      const path = `workflows/Draft${i}.json`
+      state = upsertDraft(state, path, createSnapshot(String(i)))
+    }
+
+    expect(Object.keys(state.drafts).length).toBe(MAX_DRAFTS)
+
+    state = upsertDraft(state, 'workflows/New.json', createSnapshot('new'))
+    expect(Object.keys(state.drafts).length).toBe(MAX_DRAFTS)
+    expect(state.drafts).not.toHaveProperty('workflows/Draft0.json')
+    expect(state.order[state.order.length - 1]).toBe('workflows/New.json')
+  })
+
+  it('removeDraft clears entry and order', () => {
+    const state = upsertDraft(
+      createDraftCacheState(),
+      'workflows/test.json',
+      createSnapshot('test')
+    )
+
+    const nextState = removeDraft(state, 'workflows/test.json')
+    expect(nextState.drafts).toEqual({})
+    expect(nextState.order).toEqual([])
+  })
+
+  it('moveDraft renames entry and updates order', () => {
+    const state = upsertDraft(
+      createDraftCacheState(),
+      'workflows/old.json',
+      createSnapshot('old')
+    )
+
+    const nextState = moveDraft(
+      state,
+      'workflows/old.json',
+      'workflows/new.json',
+      'new'
+    )
+    expect(nextState.drafts).not.toHaveProperty('workflows/old.json')
+    expect(nextState.drafts['workflows/new.json']?.name).toBe('new')
+    expect(nextState.order).toEqual(['workflows/new.json'])
+  })
+
+  it('mostRecentDraftPath returns last entry', () => {
+    const state = createDraftCacheState({}, ['a', 'b', 'c'])
+    expect(mostRecentDraftPath(state.order)).toBe('c')
+    expect(mostRecentDraftPath([])).toBeNull()
+  })
+})