tamtamchik / exchanger

import { getExchangeRate } from '../src'

const shouldRunAcceptanceTests = process.env.RUN_ACCEPTANCE_TESTS === 'true'

const runOrSkip = shouldRunAcceptanceTests ? describe : describe.skip

runOrSkip('getExchangeRate acceptance tests', () => {

  jest.setTimeout(30 * 1000)

  it('should return exchange rate for real API call', async () => {

    const rate = await getExchangeRate('USD', 'EUR')

    console.log(`1 USD = ${rate} EUR`)

    expect(rate).toBeGreaterThan(0)  // Basic check, as the actual rate will vary

  })

  it('should handle requests for multiple currency pairs', async () => {

    const rates = await Promise.all([

      getExchangeRate('USD', 'EUR'),

      getExchangeRate('USD', 'GBP'),

      getExchangeRate('USD', 'JPY'),

    ])

    console.log(`1 USD = ${rates[0]} EUR`)

    console.log(`1 USD = ${rates[1]} GBP`)

    console.log(`1 USD = ${rates[2]} JPY`)

    rates.forEach(rate => {

      expect(rate).toBeGreaterThan(0)

    })

  })

  it('should throw an error for unknown currency codes', async () => {

    await expect(getExchangeRate('USD', 'ZZZ')).rejects.toThrow()

  })

})