feat: 初始化工程

src/utils/debounce.test.ts

@@ -0,0 +1,59 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { debounce } from './debounce'
+
+describe('debounce', () => {
+  beforeEach(() => {
+    vi.useFakeTimers()
+  })
+
+  afterEach(() => {
+    vi.useRealTimers()
+  })
+
+  it('trailing edge（默认）：多次调用后只触发一次，使用最后一次的参数', () => {
+    const fn = vi.fn()
+    const debouncedFn = debounce(fn, 100)
+
+    debouncedFn('first')
+    debouncedFn('second')
+    debouncedFn('last')
+
+    expect(fn).not.toHaveBeenCalled()
+
+    vi.advanceTimersByTime(100)
+
+    expect(fn).toHaveBeenCalledTimes(1)
+    expect(fn).toHaveBeenCalledWith('last')
+  })
+
+  it('cancel：取消后计时器到期不执行', () => {
+    const fn = vi.fn()
+    const debouncedFn = debounce(fn, 100)
+
+    debouncedFn()
+    debouncedFn.cancel()
+
+    vi.advanceTimersByTime(100)
+
+    expect(fn).not.toHaveBeenCalled()
+  })
+
+  it('flush：立即执行待执行的调用并传递参数', () => {
+    const fn = vi.fn()
+    const debouncedFn = debounce(fn, 100)
+
+    debouncedFn('arg1')
+    debouncedFn.flush()
+
+    expect(fn).toHaveBeenCalledWith('arg1')
+  })
+
+  it('leading edge：第一次调用立即执行', () => {
+    const fn = vi.fn()
+    const debouncedFn = debounce(fn, 100, { edges: ['leading'] })
+
+    debouncedFn()
+
+    expect(fn).toHaveBeenCalledTimes(1)
+  })
+})