From f2a2ea6dc2948c6492ac51422fce3939c95a6272 Mon Sep 17 00:00:00 2001
From: iamkun <kunhello@outlook.com>
Date: Wed, 26 May 2021 14:37:03 +0800
Subject: [PATCH] test: add utc plugin test

---
 src/constant.js         |  4 ----
 src/plugin/utc/index.js |  5 ++++-
 test/plugin/utc.test.js | 10 ++++++++++
 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/constant.js b/src/constant.js
index f6af3efe2..6be602e2c 100644
--- a/src/constant.js
+++ b/src/constant.js
@@ -28,7 +28,3 @@ export const INVALID_DATE_STRING = 'Invalid Date'
 // regex
 export const REGEX_PARSE = /^(\d{4})[-/]?(\d{1,2})?[-/]?(\d{0,2})[^0-9]*(\d{1,2})?:?(\d{1,2})?:?(\d{1,2})?[.:]?(\d+)?$/
 export const REGEX_FORMAT = /\[([^\]]+)]|Y{1,4}|M{1,4}|D{1,2}|d{1,4}|H{1,2}|h{1,2}|a|A|m{1,2}|s{1,2}|Z{1,2}|SSS/g
-
-// used by plugins/utc
-export const REGEX_VALID_OFFSET_FORMAT = /[+-]\d\d(?::?\d\d)?/g
-export const REGEX_OFFSET_HOURS_MINUTES_FORMAT = /([+-]|\d\d)/g
diff --git a/src/plugin/utc/index.js b/src/plugin/utc/index.js
index 7e842b3b0..10ff1ec9a 100644
--- a/src/plugin/utc/index.js
+++ b/src/plugin/utc/index.js
@@ -1,4 +1,7 @@
-import { MILLISECONDS_A_MINUTE, MIN, REGEX_VALID_OFFSET_FORMAT, REGEX_OFFSET_HOURS_MINUTES_FORMAT } from '../../constant'
+import { MILLISECONDS_A_MINUTE, MIN } from '../../constant'
+
+const REGEX_VALID_OFFSET_FORMAT = /[+-]\d\d(?::?\d\d)?/g
+const REGEX_OFFSET_HOURS_MINUTES_FORMAT = /([+-]|\d\d)/g
 
 function offsetFromString(value = '') {
   const offset = value.match(REGEX_VALID_OFFSET_FORMAT)
diff --git a/test/plugin/utc.test.js b/test/plugin/utc.test.js
index 2dd5c0c35..b8fc92591 100644
--- a/test/plugin/utc.test.js
+++ b/test/plugin/utc.test.js
@@ -291,6 +291,16 @@ describe('UTC Offset', () => {
     expect(daysJS.utcOffset()).toEqual(0)
     expect(daysJS.utcOffset()).toEqual(momentJS.utcOffset())
   })
+
+  it('get utc offset with an invalid string value, value: 0', () => {
+    const time = '2021-02-28 19:40:10'
+    const daysJS = dayjs(time, { utc: true }).utc(true).utcOffset('+0000')
+    const momentJS = moment(time).utc(true).utcOffset('+0000')
+
+    expect(daysJS.toISOString()).toEqual(momentJS.toISOString())
+    expect(daysJS.utcOffset()).toEqual(0)
+    expect(daysJS.utcOffset()).toEqual(momentJS.utcOffset())
+  })
 })
 
 describe('Diff', () => {