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import Mocha from 'mocha'
import logger from '@wdio/logger'
import { runTestInFiberContext, executeHooksWithArgs } from '@wdio/config'
import { loadModule } from './utils'
import { INTERFACES, EVENTS, NOOP } from './constants'
const log = logger('@wdio/mocha-framework')
/**
* Extracts the mocha UI type following this convention:
* - If the mochaOpts.ui provided doesn't contain a '-' then the full name
* is taken as ui type (i.e. 'bdd','tdd','qunit')
* - If it contains a '-' then it asumes we are providing a custom ui for
* mocha. Then it extracts the text after the last '-' (ignoring .js if
* provided) as the interface type. (i.e. strong-bdd in
* https://github.com/strongloop/strong-mocha-interfaces)
*/
const MOCHA_UI_TYPE_EXTRACTOR = /^(?:.*-)?([^-.]+)(?:.js)?$/
const DEFAULT_INTERFACE_TYPE = 'bdd'
/**
* Mocha runner
*/
class MochaAdapter {
constructor (cid, config, specs, capabilities, reporter) {
this.cid = cid
this.capabilities = capabilities
this.reporter = reporter
this.specs = specs
this.config = Object.assign({
mochaOpts: {}
}, config)
this.runner = {}
this.level = 0
this.suiteCnt = new Map()
this.hookCnt = new Map()
this.testCnt = new Map()
this.suiteIds = ['0']
}
async run () {
const { mochaOpts } = this.config
const mocha = this.mocha = new Mocha(mochaOpts)
mocha.loadFiles()
mocha.reporter(NOOP)
mocha.fullTrace()
this.specs.forEach((spec) => mocha.addFile(spec))
mocha.suite.on('pre-require', ::this.preRequire)
let runtimeError
await executeHooksWithArgs(this.config.before, [this.capabilities, this.specs])
const result = await new Promise((resolve) => {
try {
this.runner = mocha.run(resolve)
} catch (e) {
runtimeError = e
return resolve(1)
}
Object.keys(EVENTS).forEach((e) =>
this.runner.on(e, this.emit.bind(this, EVENTS[e])))
this.runner.suite.beforeAll(this.wrapHook('beforeSuite'))
this.runner.suite.beforeEach(this.wrapHook('beforeTest'))
this.runner.suite.afterEach(this.wrapHook('afterTest'))
this.runner.suite.afterAll(this.wrapHook('afterSuite'))
})
await executeHooksWithArgs(this.config.after, [runtimeError || result, this.capabilities, this.specs])
/**
* in case the spec has a runtime error throw after the wdio hook
*/
if (runtimeError) {
throw runtimeError
}
return result
}
options (options, context) {
let { require = [], compilers = [] } = options
if (typeof require === 'string') {
require = [require]
}
this.requireExternalModules([...compilers, ...require], context)
}
preRequire (context, file, mocha) {
const options = this.config.mochaOpts
const match = MOCHA_UI_TYPE_EXTRACTOR.exec(options.ui)
const type = (match && INTERFACES[match[1]] && match[1]) || DEFAULT_INTERFACE_TYPE
INTERFACES[type].forEach((fnName) => {
let testCommand = INTERFACES[type][0]
runTestInFiberContext(
[testCommand, testCommand + '.only'],
this.config.beforeHook,
this.config.afterHook,
fnName
)
})
this.options(options, { context, file, mocha, options })
}
/**
* Hooks which are added as true Mocha hooks need to call done() to notify async
*/
wrapHook (hookName) {
return () => executeHooksWithArgs(
this.config[hookName],
this.prepareMessage(hookName)
).catch((e) => {
log.error(`Error in ${hookName} hook: ${e.stack.slice(7)}`)
})
}
prepareMessage (hookName) {
const params = { type: hookName }
switch (hookName) {
case 'beforeSuite':
case 'afterSuite':
params.payload = this.runner.suite.suites[0]
break
case 'beforeTest':
case 'afterTest':
params.payload = this.runner.test
break
}
params.err = this.lastError
delete this.lastError
return this.formatMessage(params)
}
formatMessage (params) {
let message = {
type: params.type
}
if (params.err) {
message.error = {
message: params.err.message,
stack: params.err.stack,
type: params.err.type || params.err.name,
expected: params.err.expected,
actual: params.err.actual
}
/**
* hook failures are emitted as "test:fail"
*/
if (params.payload && params.payload.title && params.payload.title.match(/^"(before|after)( all)*" hook/g)) {
message.type = 'hook:end'
}
}
if (params.payload) {
message.title = params.payload.title
message.parent = params.payload.parent ? params.payload.parent.title : null
message.fullTitle = params.payload.fullTitle ? params.payload.fullTitle() : message.parent + ' ' + message.title
message.pending = params.payload.pending || false
message.file = params.payload.file
message.duration = params.payload.duration
/**
* Add the current test title to the payload for cases where it helps to
* identify the test, e.g. when running inside a beforeEach hook
*/
if (params.payload.ctx && params.payload.ctx.currentTest) {
message.currentTest = params.payload.ctx.currentTest.title
}
if (params.type.match(/Test/)) {
message.passed = (params.payload.state === 'passed')
}
if (params.payload.context) { message.context = params.payload.context }
}
return message
}
requireExternalModules (modules, context) {
modules.forEach(module => {
if (!module) {
return
}
module = module.replace(/.*:/, '')
if (module.substr(0, 1) === '.') {
module = path.join(process.cwd(), module)
}
loadModule(module, context)
})
}
emit (event, payload, err) {
/**
* For some reason, Mocha fires a second 'suite:end' event for the root suite,
* with no matching 'suite:start', so this can be ignored.
*/
if (payload.root) return
let message = this.formatMessage({ type: event, payload, err })
message.cid = this.cid
message.specs = this.specs
message.uid = this.getUID(message)
Eif (message.error) {
this.lastError = message.error
}
this.reporter.emit(message.type, message)
}
getSyncEventIdStart (type) {
const prop = `${type}Cnt`
const suiteId = this.suiteIds[this.suiteIds.length - 1]
const cnt = this[prop].has(suiteId)
? this[prop].get(suiteId)
: 0
this[prop].set(suiteId, cnt + 1)
return `${type}-${suiteId}-${cnt}`
}
getSyncEventIdEnd (type) {
const prop = `${type}Cnt`
const suiteId = this.suiteIds[this.suiteIds.length - 1]
const cnt = this[prop].get(suiteId) - 1
return `${type}-${suiteId}-${cnt}`
}
getUID (message) {
if (message.type === 'suite:start') {
const suiteCnt = this.suiteCnt.has(this.level)
? this.suiteCnt.get(this.level)
: 0
const suiteId = `suite-${this.level}-${suiteCnt}`
if (this.suiteCnt.has(this.level)) {
this.suiteCnt.set(this.level, this.suiteCnt.get(this.level) + 1)
} else {
this.suiteCnt.set(this.level, 1)
}
// const suiteId = this.getSyncEventIdStart('suite')
this.suiteIds.push(`${this.level}${suiteCnt}`)
this.level++
return suiteId
}
if (message.type === 'suite:end') {
this.level--
const suiteCnt = this.suiteCnt.get(this.level) - 1
const suiteId = `suite-${this.level}-${suiteCnt}`
this.suiteIds.pop()
return suiteId
}
if (message.type === 'hook:start') {
return this.getSyncEventIdStart('hook')
}
if (message.type === 'hook:end') {
return this.getSyncEventIdEnd('hook')
}
if (['test:start', 'test:pending'].includes(message.type)) {
return this.getSyncEventIdStart('test')
}
if (['test:end', 'test:pass', 'test:fail'].includes(message.type)) {
return this.getSyncEventIdEnd('test')
}
throw new Error(`Unknown message type : ${message.type}`)
}
}
const adapterFactory = {}
adapterFactory.run = async function (...args) {
const adapter = new MochaAdapter(...args)
const result = await adapter.run()
return result
}
export default adapterFactory
export { MochaAdapter, adapterFactory }
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