canvas-lms/packages/jest-moxios-utils/index.js

56 lines
1.5 KiB
JavaScript

/*
* Copyright (C) 2018 - present Instructure, Inc.
*
* This file is part of Canvas.
*
* Canvas is free software: you can redistribute it and/or modify it under
* the terms of the GNU Affero General Public License as published by the Free
* Software Foundation, version 3 of the License.
*
* Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
* details.
*
* You should have received a copy of the GNU Affero General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
const moxios = require('moxios')
function isPromise(subject) {
return (
typeof subject !== 'undefined' &&
typeof subject.then !== 'undefined' &&
typeof subject.then === 'function'
)
}
function moxiosWait(fn) {
return new Promise((resolve, reject) => {
moxios.wait(() => {
try {
resolve(fn(moxios.requests.mostRecent()))
} catch (e) {
reject(e)
}
})
})
}
function moxiosRespond(response, requestPromise, opts = {}) {
if (!isPromise(requestPromise)) throw new Error('moxiosResult requires a promise for the request')
const waitPromise = moxiosWait(request => {
request.respondWith({status: 200, headers: {}, response, ...opts})
})
return Promise.all([waitPromise, requestPromise]).then(
([_waitResult, requestResult]) => requestResult
)
}
module.exports = {
isPromise,
moxiosWait,
moxiosRespond
}