Since I am QA I have a question. How to test the Lightning component? I know for sure that: 1) Check the design attributes 2) Is the component displayed on the page? And what else and how else can you project? I perform manual/functional testing
You can always run the flow to do positive testing as they should work as expected.
Second, you can use Lightning Testing Service. Use Lightning Testing Service (LTS) to ensure your components perform as expected. LTS is a full suite of tools and services integrated with Salesforce DX to make testing easy.
There is a trailhead module for same which you can refer. Write Tests for Your Lightning Components