main frame - didStartProvisionalLoadForFrame
main frame - didCommitLoadForFrame
CONSOLE MESSAGE: Refused to load http://127.0.0.1:8000/loading/resources/zero-length.js because it does not appear in the script-src directive of the Content Security Policy.
CONSOLE MESSAGE: Refused to load http://127.0.0.1:8000/loading/resources/zero-length.js because it does not appear in the script-src directive of the Content Security Policy.
main frame - didFinishDocumentLoadForFrame
main frame - didHandleOnloadEventsForFrame
main frame - didFinishLoadForFrame
This test makes sure that the Preload scanner does not preload a script resource that is blocked by the Content Security Policy of the page. 
PASS