diff --git a/Conversions/HexToBinary.js b/Conversions/HexToBinary.js
index 2334954f92..2456dba016 100644
--- a/Conversions/HexToBinary.js
+++ b/Conversions/HexToBinary.js
@@ -1,34 +1,41 @@
-const binLookup = (c) => {
- switch (c.toLowerCase()) {
- case '0': return '0000'
- case '1': return '0001'
- case '2': return '0010'
- case '3': return '0011'
- case '4': return '0100'
- case '5': return '0101'
- case '6': return '0110'
- case '7': return '0111'
- case '8': return '1000'
- case '9': return '1001'
- case 'a': return '1010'
- case 'b': return '1011'
- case 'c': return '1100'
- case 'd': return '1101'
- case 'e': return '1110'
- case 'f': return '1111'
- default: return ''
- }
-}
+const binLookup = (key) => ({
+ 0: '0000',
+ 1: '0001',
+ 2: '0010',
+ 3: '0011',
+ 4: '0100',
+ 5: '0101',
+ 6: '0110',
+ 7: '0111',
+ 8: '1000',
+ 9: '1001',
+ a: '1010',
+ b: '1011',
+ c: '1100',
+ d: '1101',
+ e: '1110',
+ f: '1111'
+}[key.toLowerCase()]) // select the binary number by valid hex key with the help javascript object
+
const hexToBinary = (hexString) => {
+ if (typeof hexString !== 'string') {
+ throw new TypeError('Argument is not a string type')
+ }
+
+ if (/[^\da-f]/gi.test(hexString)) {
+ throw new Error('Argument is not a valid HEX code!')
+ }
/*
Function for converting Hex to Binary
1. We convert every hexadecimal bit to 4 binary bits
2. Conversion goes by searching in the lookup table
+ */
- */
- const hexLexemes = hexString.split('')
- return hexLexemes.map(lexeme => binLookup(lexeme)).join('')
+ return hexString.replace(
+ /[0-9a-f]/gi,
+ lexeme => binLookup(lexeme)
+ )
}
export default hexToBinary
diff --git a/Conversions/test/HexToBinary.test.js b/Conversions/test/HexToBinary.test.js
index 40148d1cee..6a7ec265d9 100644
--- a/Conversions/test/HexToBinary.test.js
+++ b/Conversions/test/HexToBinary.test.js
@@ -1,6 +1,18 @@
import hexToBinary from '../HexToBinary'
-describe('hexToBinary', () => {
+describe('Testing hexToBinary', () => {
+ it('expects throw error in invalid types', () => {
+ expect(() => hexToBinary(false)).toThrowError()
+ expect(() => hexToBinary(null)).toThrowError()
+ expect(() => hexToBinary(23464)).toThrowError()
+ })
+
+ it('expects throw error in invalid hex', () => {
+ expect(() => hexToBinary('Hello i am not a valid Hex')).toThrowError()
+ expect(() => hexToBinary('Gf46f')).toThrowError()
+ expect(() => hexToBinary('M')).toThrowError()
+ })
+
it('expects to return correct hexadecimal value', () => {
expect(hexToBinary('8')).toBe('1000')
})
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