Update docs for testing section to the latest Angular version (v7) #27331
Description
📚 Docs or angular.io bug report
Description
✍️ Right now documentation for testing is outdated and npm commands are not updated to the latest angular version (v7)
🔬 Minimal Reproduction
Open https://angular.io/guide/testing#configure-project-for-circle-ci and you will see that npm scripts are using --single-run which is not longer supported and other outdated flags.
What's the affected URL?**
https://angular.io/guide/testing#configure-project-for-circle-ci
https://angular.io/guide/testing#configure-project-for-travis-ci
https://angular.io/guide/testing#configure-cli-for-ci-testing-in-chrome
Reproduction Steps**
Expected vs Actual Behavior**
📷Screenshot
🔥 Exception or Error