feat: adding testing for the function

index.js

@@ -9,6 +9,45 @@ const addCero = (num) => {
   return num < 10 ? `0${num}` : num
 }
 
+const gmtChecker = (gmt) => {
+  const array = [
+    'GMT+00:00',
+    'GMT-00:00',
+    'GMT+01:00',
+    'GMT+02:00',
+    'GMT+02:00',
+    'GMT+03:00',
+    'GMT+03:30',
+    'GMT+04:00',
+    'GMT+05:00',
+    'GMT+05:30',
+    'GMT+06:00',
+    'GMT+07:00',
+    'GMT+08:00',
+    'GMT+09:00',
+    'GMT+09:30',
+    'GMT+10:00',
+    'GMT+11:00',
+    'GMT+12:00',
+    'GMT-11:00',
+    'GMT-10:00',
+    'GMT-09:00',
+    'GMT-08:00',
+    'GMT-07:00',
+    'GMT-07:00',
+    'GMT-06:00',
+    'GMT-05:00',
+    'GMT-05:00',
+    'GMT-04:00',
+    'GMT-03:30',
+    'GMT-03:00',
+    'GMT-03:00',
+    'GMT-01:00'
+  ]
+  if (gmt === undefined) return true
+  return array.includes(gmt)
+}
+
 /**
  * Retrieve the date as format yyyy/mm/dd hh:mm:ss
 * @param {timestamp} date
@@ -22,7 +61,9 @@ module.exports = (dateGetThem, gmtHours) => {
     if (!valid) return -1
   }
 
-  gmtHours = !gmtHours ? 'GMT-00:00' : gmtHours
+  if (!gmtChecker(gmtHours)) return -1
+  gmtHours = !gmtHours ? 'GMT+00:00' : gmtHours
+
   const gmt = new GMT(gmtHours)
   let currentDate = (!dateGetThem) ? new Date() : new Date(dateGetThem)
   currentDate = gmt.relativeDate(currentDate)
@@ -36,3 +77,4 @@ module.exports = (dateGetThem, gmtHours) => {
   const yearMonthDay = `${year}/${addCero(month + 1)}/${addCero(date)} ${addCero(hour)}:${addCero(minutes)}:${addCero(seconds)}`
   return yearMonthDay
 }
+

package.json

@@ -4,7 +4,7 @@
   "description": "convert the timestamp in a format dd/mm/yyyy hh:mm:ss",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "jest"
   },
   "keywords": [
     "time",
@@ -23,7 +23,8 @@
   "devDependencies": {
     "@commitlint/cli": "^15.0.0",
     "@commitlint/config-conventional": "^15.0.0",
-    "husky": "^4.3.8"
+    "husky": "^4.3.8",
+    "jest": "^27.3.1"
   },
   "dependencies": {
     "node-gmt": "^0.0.2"

test/checkerGmt.test.js

@@ -0,0 +1,48 @@
+const gmthours = require('../index')
+
+describe('hours format', () => {
+  it ('get current hours format', () => {
+    const result = gmthours()
+    expect(result).not.toBeNull()
+  })
+
+  it ('get hours by timestamp', () => {
+    const dateNow = new Date()
+    expect(gmthours(dateNow)).not.toBeNull()
+  })
+
+  it ('get hours by timestamp specifically', () => {
+    const dateNow = new Date(1995, 11, 17)
+    expect(gmthours(dateNow)).toBe('1995/12/17 06:00:00')
+  })
+
+  it ('get hours by time and gmt specifically', () => {
+    const dateNow = new Date(1995, 11, 17)
+    const gmt = 'GMT-05:00'
+    expect(gmthours(dateNow, gmt)).toBe('1995/12/17 01:00:00')
+  })
+})
+
+describe('check bad request', () => {
+  it ('string is not allowed', () => {
+    const stringWord = 'string word'
+    expect(gmthours(stringWord)).toBe(-1)
+  })
+
+  it ('number is not allowed', () => {
+    const numberWord = 10
+    expect(gmthours(numberWord)).toBe(-1)
+  })
+
+  it ('gmt allowed in GMT format', () => {
+    const dateNow = new Date(1995, 11, 17)
+    const gmt = 'esto es un string'
+    expect(gmthours(dateNow, gmt)).toBe(-1)
+  })
+
+  it ('gmt allowed in GMT format', () => {
+    const dateNow = new Date(1995, 11, 17)
+    const gmt = 10
+    expect(gmthours(dateNow, gmt)).toBe(-1)
+  })
+})