fix: fix clone

Author: iamkun

package.json

@@ -40,5 +40,8 @@
     "rollup": "^0.57.1",
     "rollup-plugin-babel": "^4.0.0-beta.4",
     "rollup-plugin-uglify": "^3.0.0"
+  },
+  "dependencies": {
+    "lodash": "^4.17.5"
   }
 }

src/index.js

@@ -1,3 +1,4 @@
+import { cloneDeep } from 'lodash'
 import * as Constant from './constant'
 
 const padStart = (string, length, pad) => {
@@ -83,6 +84,9 @@ class Dayjs {
       case 'month':
         this.$date.setMonth(int)
         break
+      case 'year':
+        this.$date.setFullYear(int)
+        break
       default:
         break
     }
@@ -179,7 +183,7 @@ class Dayjs {
   }
 
   clone() {
-    return Object.assign(Object.create(this), this)
+    return cloneDeep(this)
   }
 }
 

test/parse.test.js

@@ -27,3 +27,17 @@ test('String Other', () => {
   global.console.warn = jest.genMockFunction()// moment.js otherString will throw warn
   expect(dayjs('otherString').toString().toLowerCase()).toBe(moment('otherString').toString().toLowerCase())
 })
+
+it('Clone not affect each other', () => {
+  const base = dayjs()
+  const year = base.year()
+  const another = base.clone()
+  another.set('year', year + 1)
+  expect(another.unix() - base.unix()).toBe(31536000)
+})
+
+it('Clone with same value', () => {
+  const base = dayjs('20170101')
+  const another = base.clone()
+  expect(base.toString()).toBe(another.toString())
+})