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test/py: fix timeout to be absolute

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Currently, Spawn.expect() imposes its timeout solely upon receipt of new
data, not on its overall operation. In theory, this could cause the
timeout not to fire if U-Boot continually generated output that did not
match the expected patterns.

Fix the code to additionally impose a timeout on overall operation, which
is the intended mode of operation.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stephen Warren 2016-01-22 12:30:07 -07:00 • committed by Simon Glass
parent b75fdc11eb
commit d314e247e1
1 changed files with 6 additions and 1 deletions
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7
test/py/u_boot_spawn.py
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@ -122,6 +122,7 @@ class Spawn(object):
if type(patterns[pi]) == type(''):
patterns[pi] = re.compile(patterns[pi])
tstart_s = time.time()
try:
while True:
earliest_m = None
@ -142,7 +143,11 @@ class Spawn(object):
self.after = self.buf[pos:posafter]
self.buf = self.buf[posafter:]
return earliest_pi
events = self.poll.poll(self.timeout)
tnow_s = time.time()
tdelta_ms = (tnow_s - tstart_s) * 1000
if tdelta_ms > self.timeout:
raise Timeout()
events = self.poll.poll(self.timeout - tdelta_ms)
if not events:
raise Timeout()
c = os.read(self.fd, 1024)