Updated the files.

my-app/node_modules/karma/lib/launchers/base.js

@@ -0,0 +1,140 @@
+const KarmaEventEmitter = require('../events').EventEmitter
+const EventEmitter = require('events').EventEmitter
+
+const log = require('../logger').create('launcher')
+const helper = require('../helper')
+
+const BEING_CAPTURED = 'BEING_CAPTURED'
+const CAPTURED = 'CAPTURED'
+const BEING_KILLED = 'BEING_KILLED'
+const FINISHED = 'FINISHED'
+const RESTARTING = 'RESTARTING'
+const BEING_FORCE_KILLED = 'BEING_FORCE_KILLED'
+
+/**
+ * Base launcher that any custom launcher extends.
+ */
+function BaseLauncher (id, emitter) {
+  if (this.start) {
+    return
+  }
+
+  // TODO(vojta): figure out how to do inheritance with DI
+  Object.keys(EventEmitter.prototype).forEach(function (method) {
+    this[method] = EventEmitter.prototype[method]
+  }, this)
+
+  this.bind = KarmaEventEmitter.prototype.bind.bind(this)
+  this.emitAsync = KarmaEventEmitter.prototype.emitAsync.bind(this)
+
+  this.id = id
+  this._state = null
+  Object.defineProperty(this, 'state', {
+    get: () => {
+      return this._state
+    },
+    set: (toState) => {
+      log.debug(`${this._state} -> ${toState}`)
+      this._state = toState
+    }
+  })
+
+  this.error = null
+
+  let killingPromise
+  let previousUrl
+
+  this.start = function (url) {
+    previousUrl = url
+
+    this.error = null
+    this.state = BEING_CAPTURED
+    this.emit('start', url + '?id=' + this.id + (helper.isDefined(this.displayName) ? '&displayName=' + encodeURIComponent(this.displayName) : ''))
+  }
+
+  this.kill = function () {
+    // Already killed, or being killed.
+    if (killingPromise) {
+      return killingPromise
+    }
+
+    killingPromise = this.emitAsync('kill').then(() => {
+      this.state = FINISHED
+    })
+
+    this.state = BEING_KILLED
+
+    return killingPromise
+  }
+
+  this.forceKill = function () {
+    this.kill()
+    this.state = BEING_FORCE_KILLED
+
+    return killingPromise
+  }
+
+  this.restart = function () {
+    if (this.state === BEING_FORCE_KILLED) {
+      return
+    }
+
+    if (!killingPromise) {
+      killingPromise = this.emitAsync('kill')
+    }
+
+    killingPromise.then(() => {
+      if (this.state === BEING_FORCE_KILLED) {
+        this.state = FINISHED
+      } else {
+        killingPromise = null
+        log.debug(`Restarting ${this.name}`)
+        this.start(previousUrl)
+      }
+    })
+
+    this.state = RESTARTING
+  }
+
+  this.markCaptured = function () {
+    if (this.state === BEING_CAPTURED) {
+      this.state = CAPTURED
+    }
+  }
+
+  this.isCaptured = function () {
+    return this.state === CAPTURED
+  }
+
+  this.toString = function () {
+    return this.name
+  }
+
+  this._done = function (error) {
+    killingPromise = killingPromise || Promise.resolve()
+
+    this.error = this.error || error
+    this.emit('done')
+
+    if (this.error && this.state !== BEING_FORCE_KILLED && this.state !== RESTARTING) {
+      emitter.emit('browser_process_failure', this)
+    }
+
+    this.state = FINISHED
+  }
+
+  this.STATE_BEING_CAPTURED = BEING_CAPTURED
+  this.STATE_CAPTURED = CAPTURED
+  this.STATE_BEING_KILLED = BEING_KILLED
+  this.STATE_FINISHED = FINISHED
+  this.STATE_RESTARTING = RESTARTING
+  this.STATE_BEING_FORCE_KILLED = BEING_FORCE_KILLED
+}
+
+BaseLauncher.decoratorFactory = function (id, emitter) {
+  return function (launcher) {
+    BaseLauncher.call(launcher, id, emitter)
+  }
+}
+
+module.exports = BaseLauncher