Test that sync XMLHttpRequest GET succeeds. Status: 200 Response: Hello Test that sync XMLHttpRequest POST fails. Received exception, code: 19, name: NetworkError, message: Failed to execute 'send' on 'XMLHttpRequest': Failed to load 'blob:file:///UUID': 'GET' is the only method allowed for 'blob:' URLs. Test that sync XMLHttpRequest GET fails after the blob URL is revoked. Received exception, code: 19, name: NetworkError, message: Failed to execute 'send' on 'XMLHttpRequest': Failed to load 'blob:file:///UUID'. Test that async XMLHttpRequest GET succeeds. Status: 200 Response: Hello Test that async XMLHttpRequest POST fails. Error event is dispatched Test the slicing the blob response doesn't crash the browser. Status: 200 First byte of response: H Test that async XMLHttpRequest GET fails after the blob URL is revoked. Error event is dispatched DONE