Merge pull request #12 from xx45/dev

feat(api): add year(), month()

src/index.js

@@ -7,14 +7,23 @@ class Dayjs {
 
   parseConfig(config) {
     if (!config) return new Date()
+    if (config instanceof Date) return config
     if (/^(\d){8}$/.test(config)) {
       this.utc = true
       const y = config.substr(0, 4)
       const m = config.substr(4, 2)
       const d = config.substr(6, 2)
       return `${y}-${m}-${d}`
     }
-    return false
+    return config
+  }
+
+  year() {
+    return this.date.getFullYear()
+  }
+
+  month() {
+    return this.date.getMonth()
   }
 
   unix() {
@@ -25,6 +34,17 @@ class Dayjs {
   toString() {
     return this.date.toUTCString()
   }
+
+  startOf(arg) {
+    switch (arg) {
+      case 'year':
+        return new Dayjs(new Date(this.year(), 0, 1))
+      case 'month':
+        return new Dayjs(new Date(this.year(), this.month(), 1))
+      default:
+        return this
+    }
+  }
 }
 
 export default config => (

test/get-set.test.js

@@ -0,0 +1,11 @@
+import moment from 'moment'
+import dayjs from '../src'
+
+test('Year', () => {
+  expect(dayjs().year()).toBe(moment().year())
+})
+
+test('Month', () => {
+  expect(dayjs().month()).toBe(moment().month())
+})
+

test/manipulate.test.js

@@ -0,0 +1,15 @@
+import moment from 'moment'
+import dayjs from '../src'
+
+test('StartOf Year', () => {
+  expect(dayjs().startOf('year').unix()).toBe(moment().startOf('year').unix())
+})
+
+test('StartOf Month', () => {
+  expect(dayjs().startOf('month').unix()).toBe(moment().startOf('month').unix())
+})
+
+test('StartOf Other', () => {
+  expect(dayjs().startOf('otherString').unix()).toBe(moment().startOf('otherString').unix())
+})
+

test/parse.test.js

@@ -8,3 +8,8 @@ test('Now', () => {
 test('String 20130208', () => {
   expect(dayjs('20130208').unix()).toBe(moment('20130208').unix())
 })
+
+test('String Other', () => {
+  global.console.warn = jest.genMockFunction()// moment.js otherString will throw warn
+  expect(dayjs('otherString').toString().toLowerCase()).toBe(moment('otherString').toString().toLowerCase())
+})