Possibility to start app under tests several times, but harnesses only once

[sergey-rubtsov-05]

Situation

A Web API application has to warm up a cache right after starting in an IHostedService. For example, a dictionary of cities' telephone codes from a relational database. How are component tests able to help to handle it? One test required an empty dictionary and another test required several records.

Use cases

• A class with tests where a new app instance started for every test.
• A class with tests where an app is configured once (the content of the dictionary of telephone codes) started once and used for every test.

What is required from Enhanced.Testing.Component

• Configured version of IComponent with started harnesses.
• Separate actions of starting an app under tests and starting harnesses.