For the functional testing stage, the first step is to install the application under test. To avoid the potential problems of installing the same release twice, we'll use helm upgrade instead of install.
As you already know, Helm only acknowledges that the resources are created, not that all the Pods are running. To mitigate that, we'll wait for rollout status before proceeding with tests.
Once the application is rolled out, we'll run the functional tests. Please note that, in this case, we will run only one set of tests. In the "real" world scenario, there would probably be others like, for example, performance tests or front-end tests for different browsers.
When running multiple sets of different tests, consider using parallel construct. More information can be found in the Parallelism and Distributed Builds with...