This way we test the real scenario where server is not launched
in the same node process.
Additionally, move all connect-related tests to a single file and
clean them up.
Our current tests excercise the same-process launchServer/connect
combination. This change adds tests for remote server and immediately
exposes a bug with selector engines.
This patch moves fixtures.js to base.fixtures.ts that sits next to tests. All tests get an extra import to get the base fixtures (both types and implementations).
