'use strict'
const { getResponseData, buildKey, addMockDispatch } = require('./mock-utils')
const {
kDispatches,
kDispatchKey,
kDefaultHeaders,
kDefaultTrailers,
kContentLength,
kMockDispatch
} = require('./mock-symbols')
const { InvalidArgumentError } = require('../core/errors')
const { buildURL } = require('../core/util')
/**
* Defines the scope API for an interceptor reply
*/
class MockScope {
constructor (mockDispatch) {
this[kMockDispatch] = mockDispatch
}
/**
* Delay a reply by a set amount in ms.
*/
delay (waitInMs) {
if (typeof waitInMs !== 'number' || !Number.isInteger(waitInMs) || waitInMs <= 0) {
throw new InvalidArgumentError('waitInMs must be a valid integer > 0')
}
this[kMockDispatch].delay = waitInMs
return this
}
/**
* For a defined reply, never mark as consumed.
*/
persist () {
this[kMockDispatch].persist = true
return this
}
/**
* Allow one to define a reply for a set amount of matching requests.
*/
times (repeatTimes) {
if (typeof repeatTimes !== 'number' || !Number.isInteger(repeatTimes) || repeatTimes <= 0) {
throw new InvalidArgumentError('repeatTimes must be a valid integer > 0')
}
this[kMockDispatch].times = repeatTimes
return this
}
}
/**
* Defines an interceptor for a Mock
*/
class MockInterceptor {
constructor (opts, mockDispatches) {
if (typeof opts !== 'object') {
throw new InvalidArgumentError('opts must be an object')
}
if (typeof opts.path === 'undefined') {
throw new InvalidArgumentError('opts.path must be defined')
}
if (typeof opts.method === 'undefined') {
opts.method = 'GET'
}
// See https://github.com/nodejs/undici/issues/1245
// As per RFC 3986, clients are not supposed to send URI
// fragments to servers when they retrieve a document,
if (typeof opts.path === 'string') {
if (opts.query) {
opts.path = buildURL(opts.path, opts.query)
} else {
// Matches https://github.com/nodejs/undici/blob/main/lib/fetch/index.js#L1811
const parsedURL = new URL(opts.path, 'data://')
opts.path = parsedURL.pathname + parsedURL.search
}
}
if (typeof opts.method === 'string') {
opts.method = opts.method.toUpperCase()
}
this[kDispatchKey] = buildKey(opts)
this[kDispatches] = mockDispatches
this[kDefaultHeaders] = {}
this[kDefaultTrailers] = {}
this[kContentLength] = false
}
createMockScopeDispatchData (statusCode, data, responseOptions = {}) {
const responseData = getResponseData(data)
const contentLength = this[kContentLength] ? { 'content-length': responseData.length } : {}
const headers = { ...this[kDefaultHeaders], ...contentLength, ...responseOptions.headers }
const trailers = { ...this[kDefaultTrailers], ...responseOptions.trailers }
return { statusCode, data, headers, trailers }
}
validateReplyParameters (statusCode, data, responseOptions) {
if (typeof statusCode === 'undefined') {
throw new InvalidArgumentError('statusCode must be defined')
}
if (typeof data === 'undefined') {
throw new InvalidArgumentError('data must be defined')
}
if (typeof responseOptions !== 'object') {
throw new InvalidArgumentError('responseOptions must be an object')
}
}
/**
* Mock an undici request with a defined reply.
*/
reply (replyData) {
// Values of reply aren't available right now as they
// can only be available when the reply callback is invoked.
if (typeof replyData === 'function') {
// We'll first wrap the provided callback in another function,
// this function will properly resolve the data from the callback
// when invoked.
const wrappedDefaultsCallback = (opts) => {
// Our reply options callback contains the parameter for statusCode, data and options.
const resolvedData = replyData(opts)
// Check if it is in the right format
if (typeof resolvedData !== 'object') {
throw new InvalidArgumentError('reply options callback must return an object')
}
const { statusCode, data = '', responseOptions = {} } = resolvedData
this.validateReplyParameters(statusCode, data, responseOptions)
// Since the values can be obtained immediately we return them
// from this higher order function that will be resolved later.
return {
...this.createMockScopeDispatchData(statusCode, data, responseOptions)
}
}
// Add usual dispatch data, but this time set the data parameter to function that will eventually provide data.
const newMockDispatch = addMockDispatch(this[kDispatches], this[kDispatchKey], wrappedDefaultsCallback)
return new MockScope(newMockDispatch)
}
// We can have either one or three parameters, if we get here,
// we should have 1-3 parameters. So we spread the arguments of
// this function to obtain the parameters, since replyData will always
// just be the statusCode.
const [statusCode, data = '', responseOptions = {}] = [...arguments]
this.validateReplyParameters(statusCode, data, responseOptions)
// Send in-already provided data like usual
const dispatchData = this.createMockScopeDispatchData(statusCode, data, responseOptions)
const newMockDispatch = addMockDispatch(this[kDispatches], this[kDispatchKey], dispatchData)
return new MockScope(newMockDispatch)
}
/**
* Mock an undici request with a defined error.
*/
replyWithError (error) {
if (typeof error === 'undefined') {
throw new InvalidArgumentError('error must be defined')
}
const newMockDispatch = addMockDispatch(this[kDispatches], this[kDispatchKey], { error })
return new MockScope(newMockDispatch)
}
/**
* Set default reply headers on the interceptor for subsequent replies
*/
defaultReplyHeaders (headers) {
if (typeof headers === 'undefined') {
throw new InvalidArgumentError('headers must be defined')
}
this[kDefaultHeaders] = headers
return this
}
/**
* Set default reply trailers on the interceptor for subsequent replies
*/
defaultReplyTrailers (trailers) {
if (typeof trailers === 'undefined') {
throw new InvalidArgumentError('trailers must be defined')
}
this[kDefaultTrailers] = trailers
return this
}
/**
* Set reply content length header for replies on the interceptor
*/
replyContentLength () {
this[kContentLength] = true
return this
}
}
module.exports.MockInterceptor = MockInterceptor
module.exports.MockScope = MockScope
