TypeError: Cannot read property 'log' of undefined

[tmjeee]

07 11 2018 10:00:32.674:ERROR [karma-server]: TypeError: Cannot read property 'log' of undefined
    at TeamcityReporter.getLog (C:\repos\bitbucket\iicewebmdm\node_modules\karma-teamcity-reporter\index.js:126:29)
    at TeamcityReporter.specSuccess (C:\repos\bitbucket\iicewebmdm\node_modules\karma-teamcity-reporter\index.js:81:20)

karma-teamcity-reporter: 1.1.0
karma: 3.1.1
Angular: 7
karma-phantomjs-launcher: 1.0.4

I'm getting this error pretty consistently when running angular tests in parallel off phantomjs. Is this an issue? Any possible fixes / workaround?

[pringelmann]

+1 Also experiencing this. Although it seems flaky.

In my case I am not using phantomjs at all but rather browserstack.

[hazems]

+1, this is an issue for me.

[johnjbarton]

Setting logLevel DEBUG http://karma-runner.github.io/3.0/config/configuration-file.html might help you debug this (I don't use this plugin).

[nickbullock]

Still facing it with karma-parallel.
logLevel DEBUG didn't help, but this comment did karma-runner/karma#3342 (comment)

[andy-maca]

Got the same issue with ChromeHeadless,

10 07 2020 12:24:59.551:ERROR [karma-server]: TypeError: Cannot read property 'log' of undefined
    at TeamcityReporter.getLog (X:\work\1536afa0d351403c\Web\node_modules\karma-teamcity-reporter\index.js:126:29)
    at TeamcityReporter.specSuccess (X:\work\1536afa0d351403c\Web\node_modules\karma-teamcity-reporter\index.js:81:20)
    at TeamcityReporter.BaseReporter.onSpecComplete (X:\work\1536afa0d351403c\Web\node_modules\karma\lib\reporters\base.js:107:12)
    at Server.<anonymous> (X:\work\1536afa0d351403c\Web\node_modules\karma\lib\events.js:40:26)
    at Server.emit (events.js:187:15)
    at Browser.onResult (X:\work\1536afa0d351403c\Web\node_modules\karma\lib\browser.js:159:20)
    at Socket.socket.on (X:\work\1536afa0d351403c\Web\node_modules\karma\lib\browser.js:209:42)
    at Socket.emit (events.js:182:13)
    at X:\work\1536afa0d351403c\Web\node_modules\socket.io\lib\socket.js:528:12
    at process._tickCallback (internal/process/next_tick.js:61:11)

[marius-hi]

I'm experiencing the same issue when running Karma with karma-teamcity-reporter (see the error below). This is randomly crashing and only on TeamCity agents.
karma-teamcity-reporter: 1.1.0
karma: 5.1.1
angular: 10.0.2
karma-chrome-launcher: 3.1.0 with ChromeHeadless

I enabled DEBUG mode and the only thing that I can see is that the socket disconnects. I tried to dig in the report and could observe that when it crashes, the function onBrowserStart() is not called which won't initialise the browser at the beginning. Therefore, at the moment of reporting a message this.browserResults[browser.id] from getLog() won't be available and browserResult.log will be undefined.

The question is what could be the reason why Karma doesn't report the browser informations at startup and always call onBrowserStart() ?

[16:44:23][JavaScript Unit Tests] 07 08 2020 14:41:12.249:ERROR [karma-server]: UncaughtException:: Cannot read property 'log' of undefined [16:44:23][JavaScript Unit Tests] 07 08 2020 14:41:12.249:ERROR [karma-server]: TypeError: Cannot read property 'log' of undefined [16:44:23][JavaScript Unit Tests] at TeamcityReporter.getLog (/opt/jetbrains/TeamcityBuildAgent/work/a0c7df66c0e3b0de/client/node_modules/karma-teamcity-reporter/index.js:126:29) [16:44:23][JavaScript Unit Tests] at TeamcityReporter.specSuccess (/opt/jetbrains/TeamcityBuildAgent/work/a0c7df66c0e3b0de/client/node_modules/karma-teamcity-reporter/index.js:81:20) [16:44:23][JavaScript Unit Tests] at TeamcityReporter.BaseReporter.onSpecComplete (/opt/jetbrains/TeamcityBuildAgent/work/a0c7df66c0e3b0de/client/node_modules/karma/lib/reporters/base.js:107:12) [16:44:23][JavaScript Unit Tests] at Server.<anonymous> (/opt/jetbrains/TeamcityBuildAgent/work/a0c7df66c0e3b0de/client/node_modules/karma/lib/events.js:40:26) [16:44:23][JavaScript Unit Tests] at Server.emit (events.js:203:15) [16:44:23][JavaScript Unit Tests] at Browser.onResult (/opt/jetbrains/TeamcityBuildAgent/work/a0c7df66c0e3b0de/client/node_modules/karma/lib/browser.js:159:20) [16:44:23][JavaScript Unit Tests] at Socket.socket.on (/opt/jetbrains/TeamcityBuildAgent/work/a0c7df66c0e3b0de/client/node_modules/karma/lib/browser.js:209:42) [16:44:23][JavaScript Unit Tests] at Socket.emit (events.js:198:13)

[Franziskus1988]

To conclude: onBrowserStart and onRunStart sporadically don't get triggered when running a headless browser in TC. I don't know enough to estimate if this is a TC, Karma or browser problem.
A ugly fix could be checking if browserResult is undefined in this.getLog and call initializeBrowser if it is the case.

[andy-maca]

I made a workaround by creating a patcher like this in karma-teamcity-reporter-patcher.js:

module.exports = function(tcReporterPlugin) {
  
  const TCReporter = tcReporterPlugin['reporter:teamcity'][1];

  var newTCReporter = function(baseReporterDecorator) {
    TCReporter.call(this, baseReporterDecorator);
    
    var specSuccess = this.specSuccess;
    var specFailure = this.specFailure;
    var specSkipped = this.specSkipped;
    
    this.specSuccess = function(browser, result) {
      this.browserResults[browser.id] && specSuccess.call(this, browser, result);
    }
    
    this.specFailure = function(browser, result) {
      this.browserResults[browser.id] && specFailure.call(this, browser, result);
    }
    
    this.specSkipped = function(browser, result) {
      this.browserResults[browser.id] && specSkipped.call(this, browser, result);
    }
  }

  newTCReporter.$inject = TCReporter.$inject;

  tcReporterPlugin['reporter:teamcity'][1] = newTCReporter;
  
  return tcReporterPlugin;
}

Then in karma.config.js, use it like this:

const patcher = require("./karma-teamcity-reporter-patcher.js");
...

plugins: [
      require("karma-jasmine"),
      require("karma-chrome-launcher"),
      require("karma-firefox-launcher"),
      require("karma-coverage-istanbul-reporter"),
      teamcityReporterPatcher(require("karma-teamcity-reporter")),
      require("karma-spec-reporter"),
      require("@angular-devkit/build-angular/plugins/karma")
    ],

[Franziskus1988]

@dignifiedquire Is this repo still supported? E.g. this issue here is open for 2 and a half years now...

[bobbyg603]

thanks @andy-maca! our first run with this patch was green - hopefully things stay green!

[eliBlooma]

I got this issue. Then run the build again and it was gone. Hope this helps someone.