qemu.py: make VM() a context manager
commitd792bc3811f22a22a46c7d9a725fd29029f54095
authorStefan Hajnoczi <stefanha@redhat.com>
Thu, 24 Aug 2017 07:22:00 +0000 (24 08:22 +0100)
committerStefan Hajnoczi <stefanha@redhat.com>
Tue, 5 Sep 2017 09:32:06 +0000 (5 10:32 +0100)
tree050d6c420bae261d0909575b340dc37bf1fac2f9
parent2b483739791b33c46e6084b51edcf62107058ae1
qemu.py: make VM() a context manager

There are a number of ways to ensure that the QEMU process is shut down
when the test ends, including atexit.register(), try: finally:, or
unittest.teardown() methods.  All of these require extra code and the
programmer must remember to add vm.shutdown().

A nice solution is context managers:

  with VM(binary) as vm:
      ...
  # vm is guaranteed to be shut down here

Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-id: 20170824072202.26818-2-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
scripts/qemu.py