Runner Cleanup: SuiteRunner & TestRunner classes

[flashdesignory]

• move SuiteRunner class into a separate file
• create a new TestRunner class, which a remote workload could consume in the future
• rename _runTestAndRecordResults to TestRunner.runTest()
• create class methods for functions used in the runSync & measureAsync functions

[bgrins]

I like the direction here - would like @julienw to review the change if possible.

@flashdesignory to confirm - the big picture idea here is that remote tests will (eventually) consume resources/test-runner.mjs themselves, and it will grow functionality to manage communication back and forth with the suite (postMessage etc)?

[flashdesignory]

@flashdesignory to confirm - the big picture idea here is that remote tests will (eventually) consume resources/test-runner.mjs themselves, and it will grow functionality to manage communication back and forth with the suite (postMessage etc)?

remote tests would use the test-runner class, that's correct 😄. postMessage communication will happen on a higher level in the workloads, not on a test-runner level.

[julienw]

FTR looks good to me!