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61 lines (60 loc) · 2.2 KB
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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.'
)
)
})
})