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import {expect} from 'chai'

import {apply, isPolyfilled, isSupported, withResolvers} from '../src/promise-withResolvers.ts'

describe('withResolvers', () => {

it('has standard isSupported, isPolyfilled, apply API', () => {

expect(isSupported).to.be.a('function')

expect(isPolyfilled).to.be.a('function')

expect(apply).to.be.a('function')

expect(isSupported()).to.be.a('boolean')

expect(isPolyfilled()).to.equal(false)

})

it('resolves to first resolving value', async () => {

const arg = withResolvers()

expect(Object.keys(arg).sort()).to.eql(['promise', 'reject', 'resolve'])

expect(arg).to.have.property('promise').to.be.a('promise')

expect(arg).to.have.property('resolve').to.be.a('function')

expect(arg).to.have.property('reject').to.be.a('function')

arg.resolve(1)

expect(await arg.promise).to.be.eql(1)

})

it('rejects to first rejecting reason', async () => {

const arg = withResolvers()

expect(Object.keys(arg).sort()).to.eql(['promise', 'reject', 'resolve'])

expect(arg).to.have.property('promise').to.be.a('promise')

expect(arg).to.have.property('resolve').to.be.a('function')

expect(arg).to.have.property('reject').to.be.a('function')

const err = new Error('rejected')

try {

arg.reject(err)

await arg.promise

expect.fail('should fail')

} catch (e) {

expect(e).to.be.eql(err)

}

})

})