How to test performance / load of a modern angular application

Question

I want to load / performance test a web application which uses angular 6+ as the frontend-framework. The application is quite big and uses lots of wizards / modals etc. I w

Answer 1

You can not truly stress test your application using only UI browser testing, ideally, you would like to do both stress test all your application API calls, while also running UI/browser test.

One option to consider could be endly e2e runner, it can do both of these tasks, load test and run selenium test in parallel

It may look like the following, where "data" folder contains previously recorded http requests with optional desired validation rules hiting your API

@test.yaml

defaults:
  target:
    URL: ssh://127.0.0.1/
    credentials: localhost
pipeline:
  init:
    action: selenium:start
    version: 3.4.0
    port: 8085
    sdk: jdk
    sdkVersion: 1.8

  test:
    multiAction: true
    stressTest:
      action: run
      request: @load_test
      async: true
    testUI:
      action: selenium:run
      browser: firefox
      remoteSelenium:
        URL: http://127.0.0.1:8085
      commands:
        - get(http://play.golang.org/?simple=1)
        - (#code).clear
        - (#code).sendKeys(package main

          import "fmt"

          func main() {
          fmt.Println("Hello Endly!")
          }
          )
        - (#run).click
        - command: output = (#output).text
          exit: $output.Text:/Endly/
          sleepTimeMs: 1000
          repeat: 10
        - close
      expect:
        output:
          Text: /Hello Endly!/

where @load_test.yaml

init
  testEndpoint: rest.myapp.com
pipeline:
  test:
    data:
      []Requests: '@data/*request.json'
    range: '1..1'
    template:
      info:
        action: print
        message: starting load testing
      load:
        action: 'http/runner:load'
        threadCount: 3
        '@repeat': 100000
        requests: $data.Requests
      load-info:
        action: print
        message: 'QPS: $load.QPS: Response: min: $load.MinResponseTimeInMs ms, avg: $load.AvgResponseTimeInMs ms max: $load.MaxResponseTimeInMs ms'