The tool you are thinking about is Nightwatch.
With this, you can do E2E testing with Vue.js.
Even better, this is bundled by default when you are using vue-cli, ready to run.
The command line to create a project with Nightwatch activated by default is vue init webpack myProjectName.
Here are small tutorials about it.
EDIT: Lately I used Webdriver.io a lot, and I must say I prefer it to Nightwatch (better documentation, reactive community with a live gitter, issues that are treated in a timely fashion, etc.)