What counts as a test run?

Tests are recorded when cypress run is called with the --record flag while supplying the record --key. This means your test run data is being "recorded" to the Cloud. 

We consider each time the it() function is called to be a single test. So you will generally have several tests recorded within each spec file and likely several spec files within a single run. 

You can always see how many tests you've recorded from your organization's Billing & Usage page within the Cloud.