mirror of
https://github.com/TheAlgorithms/JavaScript.git
synced 2025-07-07 11:08:54 +08:00
85b0571d81
* Add credit card number validator
- Validates the credit card number based on Luhn algorithm
* Test Cases: ValidateCreditCard
* Auto-update DIRECTORY.md
* Fix: Spell check
* Add references and move const inside function
* Add comments
* Fix trailing spaces
* Add short description
* Remove trailing spaces
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
40 lines
2.0 KiB
JavaScript
40 lines
2.0 KiB
JavaScript
import { validateCreditCard } from '../ValidateCreditCard'
|
|
|
|
describe('Validate credit card number', () => {
|
|
it('should throw error if card number is boolean', () => {
|
|
const invalidCC = true
|
|
expect(() => validateCreditCard(invalidCC)).toThrow(
|
|
'The given value is not a string'
|
|
)
|
|
})
|
|
it('returns true if the credit card number is valid', () => {
|
|
const validCreditCard = '4111111111111111'
|
|
const validationResult = validateCreditCard(validCreditCard)
|
|
expect(validationResult).toBe(true)
|
|
})
|
|
it('should throw an error on non-numeric character in given credit card number', () => {
|
|
const nonNumericCCNumbers = ['123ABCDEF', 'ABCDKDKD', 'ADS232']
|
|
nonNumericCCNumbers.forEach(nonNumericCC => expect(() => validateCreditCard(nonNumericCC)).toThrow(
|
|
`${nonNumericCC} is an invalid credit card number because ` + 'it has nonnumerical characters.'
|
|
))
|
|
})
|
|
it('should throw an error on credit card with invalid length', () => {
|
|
const ccWithInvalidLength = ['41111', '4111111111111111111111']
|
|
ccWithInvalidLength.forEach(invalidCC => expect(() => validateCreditCard(invalidCC)).toThrow(
|
|
`${invalidCC} is an invalid credit card number because ` + 'of its length.'
|
|
))
|
|
})
|
|
it('should throw an error on credit card with invalid start substring', () => {
|
|
const ccWithInvalidStartSubstring = ['12345678912345', '23456789123456', '789123456789123', '891234567891234', '912345678912345', '31345678912345', '32345678912345', '33345678912345', '38345678912345']
|
|
ccWithInvalidStartSubstring.forEach(invalidCC => expect(() => validateCreditCard(invalidCC)).toThrow(
|
|
`${invalidCC} is an invalid credit card number because ` + 'of its first two digits.'
|
|
))
|
|
})
|
|
it('should throw an error on credit card with luhn check fail', () => {
|
|
const invalidCCs = ['411111111111111', '371211111111111', '49999999999999']
|
|
invalidCCs.forEach(invalidCC => expect(() => validateCreditCard(invalidCC)).toThrow(
|
|
`${invalidCC} is an invalid credit card number because ` + 'it fails the Luhn check.'
|
|
))
|
|
})
|
|
})
|