1 Tests that setting the value of input type=file throws and changing type resets.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS input.value is "example.txt"
8 PASS input.value = "foo" threw exception InvalidStateError: Failed to set the 'value' property on 'HTMLInputElement': This input element accepts a filename, which may only be programmatically set to the empty string..
9 PASS successfullyParsed is true