From ebd03958a5ccdc8ed677957aecc43b3506614573 Mon Sep 17 00:00:00 2001
From: peter279k <peter279k@gmail.com>
Date: Fri, 19 Jul 2019 22:07:02 +0800
Subject: [PATCH] Add isWeekend code snippets

---
 snippets/isWeekend.md  | 16 ++++++++++++++++
 tag_database           |  1 +
 test/isWeekend.test.js | 16 ++++++++++++++++
 3 files changed, 33 insertions(+)
 create mode 100644 snippets/isWeekend.md
 create mode 100644 test/isWeekend.test.js

diff --git a/snippets/isWeekend.md b/snippets/isWeekend.md
new file mode 100644
index 000000000..e3d0a1529
--- /dev/null
+++ b/snippets/isWeekend.md
@@ -0,0 +1,16 @@
+### isWeekend
+
+Results in a boolean representation of a specific date.
+
+Pass the specific date object firstly.
+Use `Date.getDay()` to check weekend then return a boolean.
+
+```js
+const isWeekend = (t = new Date()) => {
+  return t.getDay() === 0 || t.getDay() === 6;
+};
+```
+
+```js
+isWeekend(); // 2018-10-19 (if current date is 2018-10-18)
+```
diff --git a/tag_database b/tag_database
index 2ee3c14f4..2a08c84e7 100644
--- a/tag_database
+++ b/tag_database
@@ -173,6 +173,7 @@ isUndefined:type,beginner
 isUpperCase:string,utility,beginner
 isValidJSON:type,json,intermediate
 isWeekday:date,beginner
+isWeekend:uncategorized
 isWritableStream:node,type,intermediate
 join:array,intermediate
 JSONtoCSV:array,string,object,advanced
diff --git a/test/isWeekend.test.js b/test/isWeekend.test.js
new file mode 100644
index 000000000..ec5e06dd4
--- /dev/null
+++ b/test/isWeekend.test.js
@@ -0,0 +1,16 @@
+const {isWeekend} = require('./_30s.js');
+
+test('isWeekend is a Function', () => {
+  expect(isWeekend).toBeInstanceOf(Function);
+});
+test('Returns the correct type', () => {
+  expect(typeof isWeekend()).toBe('boolean');
+});
+const friday = new Date('2019-07-19');
+const saturday = new Date('2019-07-20');
+test('Returns true', () => {
+  expect(isWeekend(friday)).toBe(false);
+});
+test('Returns false', () => {
+  expect(isWeekend(saturday)).toBe(true);
+});