test(bezier-react): Improved array test coverage

packages/bezier-react/src/components/Avatars/AvatarGroup/AvatarGroup.tsx

@@ -8,7 +8,7 @@ import { MoreIcon } from '@channel.io/bezier-icons'
 
 import { Typography } from '~/src/foundation'
 
-import { isLastIndex } from '~/src/utils/array'
+import { isLastArrayIndex } from '~/src/utils/array'
 import { noop } from '~/src/utils/function'
 import {
   cssVarName,
@@ -135,7 +135,7 @@ forwardedRef: React.Ref<HTMLDivElement>,
 
       const AvatarElement = renderAvatarElement(avatar, slicedAvatarList.length)
 
-      if (!isLastIndex(arr, index)) {
+      if (!isLastArrayIndex(arr, index)) {
         return AvatarElement
       }
 

packages/bezier-react/src/utils/array.test.ts

@@ -1,20 +1,37 @@
 import {
   compact,
   flattenDeep,
+  isLastArrayIndex,
 } from './array'
 
-describe('arrayUtils', () => {
-  describe('compact', () => {
-    it('should remove falsy item', () => {
-      const array = [0, 1, false, 2, '', 3]
-      expect(compact(array)).toEqual([1, 2, 3])
-    })
+describe('isLastArrayIndex', () => {
+  it('should return true when the last array index', () => {
+    const arr = [0, 1, 2, 3, 4]
+
+    const result = isLastArrayIndex(arr, 4)
+
+    expect(result).toBe(true)
+  })
+
+  it('should return false when not the last array index', () => {
+    const arr = [0, 1, 2, 3, 4]
+
+    const result = isLastArrayIndex(arr, 1)
+
+    expect(result).toBe(false)
   })
+})
+
+describe('compact', () => {
+  it('should remove falsy item', () => {
+    const array = [0, 1, false, 2, '', 3]
+    expect(compact(array)).toEqual([1, 2, 3])
+  })
+})
 
-  describe('flattenDeep', () => {
-    it('should return flatten array', () => {
-      const array = [1, [2, [3, [4]], 5]]
-      expect(flattenDeep(array)).toEqual([1, 2, 3, 4, 5])
-    })
+describe('flattenDeep', () => {
+  it('should return flatten array', () => {
+    const array = [1, [2, [3, [4]], 5]]
+    expect(flattenDeep(array)).toEqual([1, 2, 3, 4, 5])
   })
 })

packages/bezier-react/src/utils/array.ts

@@ -1,6 +1,6 @@
 import { isArray } from './type'
 
-export function isLastIndex(array: any[], index: number) {
+export function isLastArrayIndex(array: any[], index: number) {
   return array.length - 1 === index
 }