Tests that telemetry for prevalent resources is calculated correctly.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS Hosts classified as prevalent resources.
PASS testResult.totalPrevalentResources is 0
PASS testResult.totalPrevalentResourcesWithUserInteraction is 0
PASS testResult.top3SubframeUnderTopFrameOrigins is 0
PASS Hosts classified as prevalent resources.
PASS testResult.totalPrevalentResources is 4
PASS testResult.totalPrevalentResourcesWithUserInteraction is 1
PASS testResult.top3SubframeUnderTopFrameOrigins is 4
PASS successfullyParsed is true

TEST COMPLETE