fix: jest-dev-server can't detect used ports (#235)

packages/jest-dev-server/README.md

@@ -143,9 +143,9 @@ module.exports = {
 
 ### `protocol`
 
-Type: `string`, default to `null`.
+Type: `string`, (`https`, `http`, `tcp`, `socket`) default to `tcp`.
 
-To wait for an HTTP endpoint before considering the server running, include `http` as a protocol.
+To wait for an HTTP or TCP endpoint before considering the server running, include `http` or `tcp` as a protocol.
 Must be used in conjunction with `port`.
 
 ```js

packages/jest-dev-server/src/global.js

@@ -16,7 +16,7 @@ const DEFAULT_CONFIG = {
  launchTimeout: 5000,
  host: 'localhost',
  port: null,
- protocol: 'http',
+ protocol: 'tcp',
  usedPortAction: 'ask',
  waitOnScheme: {},
 }
@@ -189,28 +189,26 @@ async function setupJestServer(providedConfig, index) {
  if (config.port) {
  const { launchTimeout, protocol, host, port, waitOnScheme } = config
 
+ let url = ''
+ if (protocol === 'tcp' || protocol === 'socket') {
+ url = `${protocol}:${host}:${port}`
+ } else {
+ url = `${protocol}://${host}:${port}`
+ }
  const opts = {
- resources: [`${protocol}://${host}:${port}`],
+ resources: [url],
+ timeout: launchTimeout,
  ...waitOnScheme,
  }
 
- let timeout
- await Promise.race([
- new Promise((resolve, reject) => {
- timeout = setTimeout(
- () =>
- reject(
- new JestDevServerError(
- `Server has taken more than ${launchTimeout}ms to start.`,
- ERROR_TIMEOUT,
- ),
- ),
- launchTimeout,
- )
- }),
- waitOn(opts),
- ])
- clearTimeout(timeout)
+ try {
+ await waitOn(opts)
+ } catch (err) {
+ throw new JestDevServerError(
+ `Server has taken more than ${launchTimeout}ms to start.`,
+ ERROR_TIMEOUT,
+ )
+ }
  }
 }