fix(move): 对空数组移动应返回空数组

src/utils/move.test.ts

@@ -4,6 +4,22 @@ describe('move', () => {
   test('是原地移动且移动正常', () => {
     const arr = [1, 2, 3]
     expect(move(arr, 0, 1)).toBe(arr).toEqual([2, 1, 3])
-    expect(move(arr, 1, 1)).toBe(arr).toEqual([2, 1, 3])
+  })
+
+  test('from 等于 to 时移动正常', () => {
+    const arr = [1, 2, 3]
+    expect(move(arr, 1, 1)).toBe(arr).toEqual([1, 2, 3])
+  })
+
+  test('超过长度时不补空', () => {
+    const arr = [1, 2, 3]
+    expect(move(arr.slice(), 0, 5)).toEqual([2, 3, 1])
+    expect(move(arr.slice(), 7, 1)).toEqual([1, 2, 3])
+  })
+
+  test('对空数组移动应返回空数组', () => {
+    const arr: any[] = []
+    expect(move(arr.slice(), 0, 1)).toEqual([])
+    expect(move(arr.slice(), 1, 1)).toEqual([])
   })
 })

src/utils/move.ts

@@ -11,6 +11,7 @@
  * ```
  */
 export function move<T>(arr: T[], from: number, to: number): T[] {
+  if (arr.length === 0 || from >= arr.length || from === to) return arr
   const item = arr.splice(from, 1)[0]
   arr.splice(to, 0, item)
   return arr