优化构架

src/shared/utils/copyText.test.ts

@@ -0,0 +1,31 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { copyText } from './copyText'
+
+describe('copyText', () => {
+  afterEach(() => {
+    vi.restoreAllMocks()
+    vi.unstubAllGlobals()
+    Reflect.deleteProperty(document, 'execCommand')
+    document.querySelectorAll('textarea[aria-hidden="true"]').forEach((element) => element.remove())
+  })
+
+  it('uses the Clipboard API when it is available', async () => {
+    const writeText = vi.fn().mockResolvedValue(undefined)
+    vi.stubGlobal('navigator', { clipboard: { writeText } })
+
+    await copyText('request-123')
+
+    expect(writeText).toHaveBeenCalledWith('request-123')
+  })
+
+  it('falls back to a temporary textarea when Clipboard API access is denied', async () => {
+    vi.stubGlobal('navigator', { clipboard: { writeText: vi.fn().mockRejectedValue(new Error('denied')) } })
+    const execCommand = vi.fn().mockReturnValue(true)
+    Object.defineProperty(document, 'execCommand', { configurable: true, value: execCommand })
+
+    await copyText('trace-456')
+
+    expect(execCommand).toHaveBeenCalledWith('copy')
+    expect(document.querySelector('textarea[aria-hidden="true"]')).toBeNull()
+  })
+})