From 92d878254f4916356bf428d4c1393fe4054cb703 Mon Sep 17 00:00:00 2001
From: Nam PHAM <13-npham@users.noreply.gitlab.maiia.io>
Date: Thu, 9 Dec 2021 15:22:27 +0100
Subject: [PATCH] test: Check if valueOf() is correct across DST

---
 test/plugin/timezone.test.js | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/test/plugin/timezone.test.js b/test/plugin/timezone.test.js
index dfcebf47e..2b28cc309 100644
--- a/test/plugin/timezone.test.js
+++ b/test/plugin/timezone.test.js
@@ -21,6 +21,7 @@ const NY = 'America/New_York'
 const VAN = 'America/Vancouver'
 const DEN = 'America/Denver'
 const TOKYO = 'Asia/Tokyo'
+const PARIS = 'Europe/Paris'
 
 describe('Guess', () => {
   it('return string', () => {
@@ -212,6 +213,18 @@ describe('DST, a time that never existed Fall Back', () => {
   })
 })
 
+it('DST valueOf', () => {
+  const day1 = '2021-11-17T09:45:00.000Z'
+  const d1 = dayjs.utc(day1).tz(PARIS)
+  const m1 = moment.tz(day1, PARIS)
+  expect(d1.valueOf()).toBe(m1.valueOf())
+
+  const day2 = '2021-05-17T09:45:00.000Z'
+  const d2 = dayjs.utc(day2).tz(PARIS)
+  const m2 = moment.tz(day2, PARIS)
+  expect(d2.valueOf()).toBe(m2.valueOf())
+})
+
 describe('set Default', () => {
   it('default timezone', () => {
     const dateStr = '2014-06-01 12:00'