From b9553463a3eed4e97d02c2ffdc3e69cf5fe610ac Mon Sep 17 00:00:00 2001
From: merelymyself <88221256+merelymyself@users.noreply.github.com>
Date: Mon, 25 Apr 2022 21:14:57 +0800
Subject: [PATCH 1/5] Create ZellersCongruenceAlgorithm.js
---
Maths/ZellersCongruenceAlgorithm.js | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
create mode 100644 Maths/ZellersCongruenceAlgorithm.js
diff --git a/Maths/ZellersCongruenceAlgorithm.js b/Maths/ZellersCongruenceAlgorithm.js
new file mode 100644
index 0000000000..3382173009
--- /dev/null
+++ b/Maths/ZellersCongruenceAlgorithm.js
@@ -0,0 +1,26 @@
+// Zeller's Congruence Algorithm finds the day of the week from the Gregorian Date. Wikipedia: https://en.wikipedia.org/wiki/Zeller%27s_congruence
+export const zellersCongruenceAlgorithm = (day, month, year) => {
+ if (typeof day !== 'number' || typeof month !== 'number' || typeof year !== 'number') {
+ return new TypeError('Arguments are not all numbers.')
+ }
+ const q = day
+ let m = month
+ let y = year
+ if (month < 3) {
+ m += 12
+ y -= 1
+ }
+ day =
+ (q + Math.floor(26 * (m + 1) / 10) + (y % 100) + Math.floor((y % 100) / 4) + Math.floor(Math.floor(y / 100) / 4) + (5 * Math.floor(y / 100))) %
+ 7
+ const days = [
+ 'Saturday',
+ 'Sunday',
+ 'Monday',
+ 'Tuesday',
+ 'Wednesday',
+ 'Thursday',
+ 'Friday'
+ ]
+ return days[day]
+}
From 525df1c430c3d019d0bc3196ac8fbf8fdbd5c9ae Mon Sep 17 00:00:00 2001
From: merelymyself <88221256+merelymyself@users.noreply.github.com>
Date: Mon, 25 Apr 2022 21:21:52 +0800
Subject: [PATCH 2/5] Create ZellersCongruenceAlgorithm.test.js
---
Maths/test/ZellersCongruenceAlgorithm.test.js | 13 +++++++++++++
1 file changed, 13 insertions(+)
create mode 100644 Maths/test/ZellersCongruenceAlgorithm.test.js
diff --git a/Maths/test/ZellersCongruenceAlgorithm.test.js b/Maths/test/ZellersCongruenceAlgorithm.test.js
new file mode 100644
index 0000000000..9861fe1cad
--- /dev/null
+++ b/Maths/test/ZellersCongruenceAlgorithm.test.js
@@ -0,0 +1,13 @@
+import { zellersCongruenceAlgorithm } from '../ZellersCongruenceAlgorithm'
+
+function testZeller (day, month, year, expected) {
+ test('Testing on ' + day + '/' + month + '/' + year, () => {
+ expect(zellersCongruenceAlgorithm(day, month, year)).toBe(expected)
+ })
+}
+
+expect(zellersCongruenceAlgorithm('this', 'should', 'error').toThrowError(new TypeError('Arguments are not all numbers.')))
+testZeller(25, 1, 2013, 'Friday')
+testZeller(26, 1, 2013, 'Saturday')
+testZeller(16, 4, 2022, 'Saturday')
+testZeller(25, 4, 2022, 'Monday')
From d007557d5080bc14dd0fd3cf61ff4d93a5ee22e7 Mon Sep 17 00:00:00 2001
From: merelymyself <88221256+merelymyself@users.noreply.github.com>
Date: Mon, 25 Apr 2022 21:26:33 +0800
Subject: [PATCH 3/5] toThrowError not valid?
---
Maths/test/ZellersCongruenceAlgorithm.test.js | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/Maths/test/ZellersCongruenceAlgorithm.test.js b/Maths/test/ZellersCongruenceAlgorithm.test.js
index 9861fe1cad..3a401a3e33 100644
--- a/Maths/test/ZellersCongruenceAlgorithm.test.js
+++ b/Maths/test/ZellersCongruenceAlgorithm.test.js
@@ -6,7 +6,11 @@ function testZeller (day, month, year, expected) {
})
}
-expect(zellersCongruenceAlgorithm('this', 'should', 'error').toThrowError(new TypeError('Arguments are not all numbers.')))
+test('Testing on this/should/throw', () => {
+ expect(() => {
+ zellersCongruenceAlgorithm('this', 'should', 'error')
+ }).toThrow(new TypeError('Arguments are not all numbers.'))
+})
testZeller(25, 1, 2013, 'Friday')
testZeller(26, 1, 2013, 'Saturday')
testZeller(16, 4, 2022, 'Saturday')
From 9dc30cd47f061b89a68097646522d09a71b2679c Mon Sep 17 00:00:00 2001
From: merelymyself <88221256+merelymyself@users.noreply.github.com>
Date: Mon, 25 Apr 2022 21:30:25 +0800
Subject: [PATCH 4/5] Update ZellersCongruenceAlgorithm.test.js
---
Maths/test/ZellersCongruenceAlgorithm.test.js | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Maths/test/ZellersCongruenceAlgorithm.test.js b/Maths/test/ZellersCongruenceAlgorithm.test.js
index 3a401a3e33..931a9348a0 100644
--- a/Maths/test/ZellersCongruenceAlgorithm.test.js
+++ b/Maths/test/ZellersCongruenceAlgorithm.test.js
@@ -9,7 +9,7 @@ function testZeller (day, month, year, expected) {
test('Testing on this/should/throw', () => {
expect(() => {
zellersCongruenceAlgorithm('this', 'should', 'error')
- }).toThrow(new TypeError('Arguments are not all numbers.'))
+ }).toThrowError(new TypeError('Arguments are not all numbers.'))
})
testZeller(25, 1, 2013, 'Friday')
testZeller(26, 1, 2013, 'Saturday')
From 86c7eecf47e502124be4333a4417e5adcc64d5e5 Mon Sep 17 00:00:00 2001
From: merelymyself <88221256+merelymyself@users.noreply.github.com>
Date: Mon, 25 Apr 2022 21:34:19 +0800
Subject: [PATCH 5/5] throw, not return.
---
Maths/ZellersCongruenceAlgorithm.js | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Maths/ZellersCongruenceAlgorithm.js b/Maths/ZellersCongruenceAlgorithm.js
index 3382173009..728fc9cc16 100644
--- a/Maths/ZellersCongruenceAlgorithm.js
+++ b/Maths/ZellersCongruenceAlgorithm.js
@@ -1,7 +1,7 @@
// Zeller's Congruence Algorithm finds the day of the week from the Gregorian Date. Wikipedia: https://en.wikipedia.org/wiki/Zeller%27s_congruence
export const zellersCongruenceAlgorithm = (day, month, year) => {
if (typeof day !== 'number' || typeof month !== 'number' || typeof year !== 'number') {
- return new TypeError('Arguments are not all numbers.')
+ throw new TypeError('Arguments are not all numbers.')
}
const q = day
let m = month
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