{
})
})
+describe('App - 大输入与 worker 回退', () => {
+ it('超过快路径阈值的文件在无 Worker 环境回退同步计算', async () => {
+ const big = Array.from({ length: 2100 }, (_, i) => `row${i}`).join('\n')
+ window.api = mockApi({
+ openFile: async () => ({
+ path: '/tmp/big.txt',
+ name: 'big.txt',
+ text: big,
+ encoding: 'UTF-8',
+ binary: false
+ })
+ })
+ render()
+ fireEvent.click(screen.getByText('打开左侧'))
+ expect(await screen.findByText('导出报告')).toBeInTheDocument()
+ // jsdom 无 Worker：同步回退完成计算，不出现计算中遮罩，行已渲染
+ expect(screen.queryByText('正在计算差异…')).not.toBeInTheDocument()
+ expect(screen.getAllByText(/row0/).length).toBeGreaterThan(0)
+ })
+})
+
describe('App - 粘贴下拉交互', () => {
it('按 Esc 关闭粘贴下拉', () => {
render()
diff --git a/src/renderer/src/components/Toolbar.test.tsx b/src/renderer/src/components/Toolbar.test.tsx
index 92883d2..9e1715a 100644
--- a/src/renderer/src/components/Toolbar.test.tsx
+++ b/src/renderer/src/components/Toolbar.test.tsx
@@ -5,7 +5,7 @@ import { DiffSummary } from '../diff/diffEngine'
const summary: DiffSummary = { changedLines: 3, inserted: 1, deleted: 1, modified: 1 }
-function setup() {
+function setup(extra?: { computing?: boolean }) {
const onOptionsChange = vi.fn()
const onNav = vi.fn()
const onExport = vi.fn()
@@ -20,6 +20,7 @@ function setup() {
navCount={3}
onNav={onNav}
onExport={onExport}
+ computing={extra?.computing ?? false}
onlyDiff={false}
onOnlyDiffChange={onOnlyDiffChange}
onSwap={onSwap}
@@ -100,4 +101,9 @@ describe('Toolbar', () => {
fireEvent.keyDown(document, { key: 'Escape' })
expect(screen.queryByText('HTML 报告')).not.toBeInTheDocument()
})
+
+ it('后台计算中禁用导出按钮', () => {
+ setup({ computing: true })
+ expect(screen.getByText('导出报告')).toBeDisabled()
+ })
})
\ No newline at end of file
diff --git a/src/renderer/src/components/Toolbar.tsx b/src/renderer/src/components/Toolbar.tsx
index 6853d28..1858f11 100644
--- a/src/renderer/src/components/Toolbar.tsx
+++ b/src/renderer/src/components/Toolbar.tsx
@@ -17,6 +17,8 @@ interface ToolbarProps {
navCount: number
onNav: (dir: 1 | -1) => void
onExport: (fmt: ReportFormat) => void
+ /** 后台差异计算中（导出不可用） */
+ computing: boolean
/** 仅看差异视图开关 */
onlyDiff: boolean
onOnlyDiffChange: (v: boolean) => void
@@ -32,6 +34,7 @@ export default function Toolbar({
navCount,
onNav,
onExport,
+ computing,
onlyDiff,
onOnlyDiffChange,
onSwap
@@ -113,7 +116,12 @@ export default function Toolbar({
-