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Improved abs function #923

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Merged
raklaptudirm merged 2 commits into from
Mar 15, 2022
Merged

Improved abs function #923

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c582f58
feat: added validation, test codes
fahimfaisaal Mar 14, 2022
cdff0e3
chore: remove useless words
fahimfaisaal Mar 15, 2022
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30 changes: 15 additions & 15 deletions Maths/Abs.js
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Original file line number Diff line number Diff line change
@@ -1,22 +1,22 @@
/**
* @function absVal
* @function abs
* @description This script will find the absolute value of a number.
* @param {Integer} num - The input integer
* @return {Integer} - Absolute number of num.
* @see [Absolute_value](https://en.wikipedia.org/wiki/Absolute_value)
* @example absVal(-10) = 10
* @example absVal(50) = 50
* @example absVal(0) = 0
* @param {number} num - The input integer
* @return {number} - Absolute number of num.
* @see https://en.wikipedia.org/wiki/Absolute_value
* @example abs(-10) = 10
* @example abs(50) = 50
* @example abs(0) = 0
*/

const absVal = (num) => {
// Find absolute value of `num`.
'use strict'
if (num < 0) {
return -num
const abs = (num) => {
const validNumber = +num // converted to number, also can use - Number(num)

if (Number.isNaN(validNumber)) {
throw new TypeError('Argument is NaN - Not a Number')
}
// Executes if condition is not met.
return num

return validNumber < 0 ? -validNumber : validNumber // if number is less then zero mean negative then it converted to positive. i.e -> n = -2 = -(-2) = 2
}

export { absVal }
export { abs }
31 changes: 26 additions & 5 deletions Maths/test/Abs.test.js
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Original file line number Diff line number Diff line change
@@ -1,18 +1,39 @@
import { absVal } from '../Abs'
import { abs } from '../Abs'

describe('Testing abs function', () => {
it('Testing for invalid types', () => {
expect(() => abs('234a')).toThrow()
expect(() => abs({})).toThrow()
expect(() => abs([12, -32, -60])).toThrow()
})

it('Testing for number of string type', () => {
expect(abs('-345')).toBe(345)
expect(abs('-345.455645')).toBe(345.455645)
})

it('Testing for a boolean type', () => {
expect(abs(true)).toBe(1)
expect(abs(false)).toBe(0)
})

describe('absVal', () => {
it('should return an absolute value of a negative number', () => {
const absOfNegativeNumber = absVal(-34)
const absOfNegativeNumber = abs(-34)
expect(absOfNegativeNumber).toBe(34)
})

it('should return an absolute value of a positive number', () => {
const absOfPositiveNumber = absVal(50)
const absOfPositiveNumber = abs(50)
expect(absOfPositiveNumber).toBe(50)
})

it('should return an absolute value of a zero number', () => {
const absOfPositiveNumber = absVal(0)
const absOfPositiveNumber = abs(0)
expect(absOfPositiveNumber).toBe(0)
})

it('should return an absolute value of any floating number', () => {
const absOfPositiveNumber = abs(-20.2034)
expect(absOfPositiveNumber).toBe(20.2034)
})
})