From aed859666a2405da3d4bd879455bb440119503b5 Mon Sep 17 00:00:00 2001
From: SlimCandy <cgpnrjmhppeb@ro.ru>
Date: Wed, 8 Feb 2023 15:02:50 +0100
Subject: [PATCH] Add lastDayOfMonth support

---
 src/code-sandbox.json                               |  1 +
 .../date-fns/08-month/lastDayOfMonth/date-fns.js    |  6 ++++++
 .../date-fns/08-month/lastDayOfMonth/notes.md       |  1 +
 .../date-fns/08-month/lastDayOfMonth/spec.js        |  9 +++++++++
 .../date-fns/08-month/lastDayOfMonth/vanilla.js     | 13 +++++++++++++
 5 files changed, 30 insertions(+)
 create mode 100644 src/content/date-fns/08-month/lastDayOfMonth/date-fns.js
 create mode 100644 src/content/date-fns/08-month/lastDayOfMonth/notes.md
 create mode 100644 src/content/date-fns/08-month/lastDayOfMonth/spec.js
 create mode 100644 src/content/date-fns/08-month/lastDayOfMonth/vanilla.js

diff --git a/src/code-sandbox.json b/src/code-sandbox.json
index 829023ce..e9dbb6e7 100644
--- a/src/code-sandbox.json
+++ b/src/code-sandbox.json
@@ -61,6 +61,7 @@
   "date-fns/08-month/getMonth": "https://codesandbox.io/s/jqquk?previewwindow=tests&file=/08-month/getMonth/vanilla.js",
   "date-fns/08-month/isFirstDayOfMonth": "https://codesandbox.io/s/ltltp?previewwindow=tests&file=/08-month/isFirstDayOfMonth/vanilla.js",
   "date-fns/08-month/isLastDayOfMonth": "https://codesandbox.io/s/d9veq?previewwindow=tests&file=/08-month/isLastDayOfMonth/vanilla.js",
+  "date-fns/08-month/lastDayOfMonth": "https://codesandbox.io/s/date-fns-lastdayofmonth-eun1ls?previewwindow=tests&file=/00-generic/compareDesc/vanilla.js",
   "date-fns/08-month/isSameMonth": "https://codesandbox.io/s/04clz?previewwindow=tests&file=/08-month/isSameMonth/vanilla.js",
   "date-fns/08-month/isThisMonth": "https://codesandbox.io/s/4u126?previewwindow=tests&file=/08-month/isThisMonth/vanilla.js",
   "date-fns/08-month/setMonth": "https://codesandbox.io/s/jcvuk?previewwindow=tests&file=/08-month/setMonth/vanilla.js",
diff --git a/src/content/date-fns/08-month/lastDayOfMonth/date-fns.js b/src/content/date-fns/08-month/lastDayOfMonth/date-fns.js
new file mode 100644
index 00000000..38b394a9
--- /dev/null
+++ b/src/content/date-fns/08-month/lastDayOfMonth/date-fns.js
@@ -0,0 +1,6 @@
+// https://date-fns.org/v2.29.3/docs/lastDayOfMonth
+const lastDayOfMonth = require('date-fns/lastDayOfMonth')
+
+// Get the last day of a month.
+module.exports = lastDayOfMonth(new Date(2014, 1, 25)).toDateString()
+// => Fri Feb 28 2014
diff --git a/src/content/date-fns/08-month/lastDayOfMonth/notes.md b/src/content/date-fns/08-month/lastDayOfMonth/notes.md
new file mode 100644
index 00000000..d4f676ec
--- /dev/null
+++ b/src/content/date-fns/08-month/lastDayOfMonth/notes.md
@@ -0,0 +1 @@
+Get the last day of a month from date.
\ No newline at end of file
diff --git a/src/content/date-fns/08-month/lastDayOfMonth/spec.js b/src/content/date-fns/08-month/lastDayOfMonth/spec.js
new file mode 100644
index 00000000..c9c5f517
--- /dev/null
+++ b/src/content/date-fns/08-month/lastDayOfMonth/spec.js
@@ -0,0 +1,9 @@
+const expected = 'Fri Feb 28 2014'
+
+const datefns = require('./date-fns')
+const plain = require('./vanilla')
+
+test('lastDayOfMonth', () => {
+  expect(datefns).toEqual(expected)
+  expect(plain).toEqual(datefns)
+})
diff --git a/src/content/date-fns/08-month/lastDayOfMonth/vanilla.js b/src/content/date-fns/08-month/lastDayOfMonth/vanilla.js
new file mode 100644
index 00000000..eb290947
--- /dev/null
+++ b/src/content/date-fns/08-month/lastDayOfMonth/vanilla.js
@@ -0,0 +1,13 @@
+function lastDayOfMonth(date) {
+  const dateClone = new Date(date.getTime())
+  const month = dateClone.getMonth()
+  dateClone.setDate(1)
+  dateClone.setMonth(month + 1)
+  dateClone.setDate(0)
+
+  return dateClone
+}
+
+// Get the last day of a month.
+module.exports = lastDayOfMonth(new Date(2014, 1, 25)).toDateString()
+// => Fri Feb 28 2014