fix: implement simply array polyfills (fixes #328)

test/unit/shared.test.js

@@ -1,32 +1,7 @@
-/**
- * @jest-environment node
- */
-import setOptions from '../../src/shared/options'
+import { setOptions } from '../../src/shared/options'
 import { defaultOptions } from '../../src/shared/constants'
-import { ensureIsArray } from '../../src/utils/ensure'
-import { hasGlobalWindowFn } from '../../src/utils/window'
 
 describe('shared', () => {
-  test('ensureIsArray ensures var is array', () => {
-    let a = { p: 1 }
-    expect(ensureIsArray(a)).toEqual([])
-
-    a = 1
-    expect(ensureIsArray(a)).toEqual([])
-
-    a = [1]
-    expect(ensureIsArray(a)).toBe(a)
-  })
-
-  test('ensureIsArray ensures obj prop is array', () => {
-    const a = { p: 1 }
-    expect(ensureIsArray(a, 'p')).toEqual({ p: [] })
-  })
-
-  test('no error when window is not defined', () => {
-    expect(hasGlobalWindowFn()).toBe(false)
-  })
-
   test('can use setOptions', () => {
     const keyName = 'MY KEY'
     let options = { keyName }