def test_pipe(self):
reader, writer = os.pipe()
try:
loop = EventLoop()
nb_reads = [0]
nb_writes = [0]
duration = .1
interval = .0095
expected_nb = 10
assert expected_nb == duration // interval
# Avoid a race condition between the loop stop and the last read.
assert expected_nb < duration / interval
start = time.time()
loop.add_timer(duration)(loop.stop)
@loop.add_timer(interval, repeat=True)
def write_something():
assert os.write(writer, 'foo') == 3
nb_writes[0] += 1
@loop.block_reader(reader)
def incoming(data):
assert data == 'foo'
nb_reads[0] += 1
loop.run()
assert round(time.time() - start, 2) == duration
assert nb_writes[0] == expected_nb, nb_writes
assert nb_reads[0] == expected_nb, nb_reads
finally:
os.close(reader)
os.close(writer)
