view tests/test-notfound @ 2016:ff5c9a92f556

fix backtrace printed when cannot get lock.

change lock error handling code so exceptions have useful info and
exception handling in one place.

add test case for when cannot get lock.

#!/bin/sh

hg init

echo "Is there an error message when trying to diff non-existing files?"
hg diff not found

echo "Is there an error message when trying to add non-existing files?"
hg add not found