Accessing FileReader when in a detached state.

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

PASS fileReader.readAsArrayBuffer(new File(['hello'], 'world.html')) threw exception AbortError: Failed to execute 'readAsArrayBuffer' on 'FileReader': Reading from a detached FileReader is not supported..
PASS successfullyParsed is true

TEST COMPLETE