From c35b20a4cebbc1c1a4d13b59fb495cf99665f531 Mon Sep 17 00:00:00 2001
From: TrasherDK <trasherdk@fumlersoft.dk>
Date: Sun, 3 Oct 2021 12:11:34 +0200
Subject: [PATCH] DecimalToHex - Add test file DecimalToHex.test.js - Add
 export to DecimalToHex.js - Remove console.log from DecimalToHex.js

---
 Conversions/DecimalToHex.js           |  8 +++-----
 Conversions/test/DecimalToHex.test.js | 15 +++++++++++++++
 2 files changed, 18 insertions(+), 5 deletions(-)
 create mode 100644 Conversions/test/DecimalToHex.test.js

diff --git a/Conversions/DecimalToHex.js b/Conversions/DecimalToHex.js
index 5b130de9a..4c40a42c2 100644
--- a/Conversions/DecimalToHex.js
+++ b/Conversions/DecimalToHex.js
@@ -1,4 +1,4 @@
-function intToHex (num) {
+function intToHex(num) {
   switch (num) {
     case 10: return 'A'
     case 11: return 'B'
@@ -10,7 +10,7 @@ function intToHex (num) {
   return num
 }
 
-function decimalToHex (num) {
+function decimalToHex(num) {
   const hexOut = []
   while (num > 15) {
     hexOut.unshift(intToHex(num % 16))
@@ -19,6 +19,4 @@ function decimalToHex (num) {
   return intToHex(num) + hexOut.join('')
 }
 
-// test cases
-console.log(decimalToHex(999098) === 'F3EBA')
-console.log(decimalToHex(123) === '7B')
+export { decimalToHex }
diff --git a/Conversions/test/DecimalToHex.test.js b/Conversions/test/DecimalToHex.test.js
new file mode 100644
index 000000000..53cd88473
--- /dev/null
+++ b/Conversions/test/DecimalToHex.test.js
@@ -0,0 +1,15 @@
+import { decimalToHex } from '../DecimalToHex'
+
+describe('DecimalToHex', () => {
+  it('expects to return correct hexadecimal value', () => {
+    expect(decimalToHex(255)).toBe('FF')
+  })
+
+  it('expects to return correct hexadecimal value, matching (num).toString(16)', () => {
+    expect(decimalToHex(32768)).toBe((32768).toString(16).toUpperCase())
+  })
+
+  it('expects to not handle negative numbers', () => {
+    expect(decimalToHex(-32768)).not.toBe((-32768).toString(16).toUpperCase())
+  })
+})