How to see more descriptive/meaningful error for "An error was thrown in afterAll\nUncaught [object Object] thrown" in CI console cmd - jasmine

Question

I have been researching on this issue but was not able to find any solution below is the error that i get while running the ng test build in Continues Integration build command prompt.
"message": "An error was thrown in afterAll\nUncaught [object Object] thrown",
"str": "An error was thrown in afterAll\nUncaught [object Object] thrown"
Below is my karma config.js:
module.exports = function (config) {
config.set({
basePath: '',
frameworks: [
'jasmine', '#angular-devkit/build-angular'
],
plugins: [
require('karma-jasmine'),
require('karma-chrome-launcher'),
require('karma-jasmine-html-reporter'),
require('karma-coverage-istanbul-reporter'),
require('#angular-devkit/build-angular/plugins/karma'),
require('karma-trx-reporter')
],
client: {
clearContext: false // leave Jasmine Spec Runner output visible in browser
},
coverageIstanbulReporter: {
dir: require('path').join(__dirname, '../coverage'),
reports: [
'html', 'lcovonly', 'cobertura'
],
fixWebpackSourcePaths: true
},
junitReporter: {
outputDir: require('path').join(__dirname, '../coverage'),
outputFile: 'cobertura-coverage.xml'
},
reporters: [
'progress', 'kjhtml', 'trx'
],
// the default configuration
trxReporter: {
outputFile: 'test-results.xml',
shortTestName: false
},
port: 9876,
colors: true,
logLevel: config.LOG_INFO,
autoWatch: true,
browsers: ['Chrome'],
singleRun: false
});
};
Below is my Package.json:
{
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test --code-coverage --watch=false --browsers=ChromeHeadless",
"lint": "ng lint",
"e2e": "ng e2e",
},
"private": true,
"dependencies": {
"#angular/animations": "^7.1.0",
"#angular/common": "^7.1.0",
"#angular/compiler": "^7.1.0",
"#angular/core": "^7.1.0",
"#angular/forms": "^7.1.0",
"#angular/http": "^7.1.0",
"#angular/platform-browser": "^7.1.0",
"#angular/platform-browser-dynamic": "^7.1.0",
"#angular/router": "^7.1.0",
"#ng-bootstrap/ng-bootstrap": "^4.0.1",
"#types/applicationinsights-js": "^1.0.7",
"applicationinsights-js": "^1.0.20",
"core-js": "^2.5.7",
"moment": "^2.22.2",
"moment-es6": "^1.0.0",
"oidc-client": "^1.5.4",
"rxjs": "^6.3.3",
"rxjs-compat": "^6.3.3",
"zone.js": "^0.8.26"
},
"devDependencies": {
"#angular-devkit/build-angular": "^0.13.1",
"#angular/cli": "^7.0.4",
"#angular/compiler-cli": "^7.1.0",
"#angular/language-service": "^7.1.0",
"#types/jasmine": "^3.3.0",
"#types/jasminewd2": "^2.0.6",
"#types/node": "^10.12.10",
"codelyzer": "~4.5.0",
"jasmine-core": "~3.3.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~3.1.1",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "~2.0.0",
"karma-jasmine": "^2.0.1",
"karma-jasmine-html-reporter": "^1.4.0",
"karma-junit-reporter": "^1.2.0",
"karma-trx-reporter": "^0.4.0",
"protractor": "^5.4.1",
"ts-node": "~7.0.1",
"tslint": "~5.11.0",
"tslint-consistent-codestyle": "^1.14.1",
"tslint-defocus": "^2.0.5",
"tslint-eslint-rules": "^5.4.0",
"tslint-origin-ordered-imports-rule": "^1.1.2",
"tslint-rxjs-subject-restrictions-rule": "^1.0.4",
"tslint-sonarts": "^1.8.0",
"typescript": "3.2.4",
"webpack-dev-server": "^3.1.10"
}
}
How to log the specific file name that is causing this issue as it is very difficult to debug looking at this error.
any suggestion is highly appreciated.
and also i am aware that in local i don't see any such errors while running "ng test"/"npm run package"(Headless chrome).But only i get to see this error in Continuous Integration build console command prompt.

Answer 1

I also faced a similar issue, which occurs intermittently when we run ng test locally, as well.
The question question helped in resolving this issue:
Karma Start Fails - HeadlessChrome - ERROR Uncaught [object Object]