def test_recv_with_no_items_blocks(self):
chan = gochans.BufferedChannel(1)
markers = []
def recvall():
markers.append(chan.recv())
markers.append(chan.recv())
be.run(recvall)
self.assertEqual(markers, [])
chan.send(1)
self.assertEqual(markers, [1])
chan.send(2)
self.assertEqual(markers, [1, 2])
def test_recv_and_send_with_full_buffer_block(self):
chan = gochans.BufferedChannel(2)
markers = []
def sendall():
markers.append(chan.send(4))
markers.append(chan.send(3))
markers.append(chan.send(2))
markers.append(chan.send(1))
sender = be.run(sendall)
self.assertEqual(len(markers), 2)
got = [chan.recv(), chan.recv()]
be.resume(sender)
self.assertEqual(len(markers), 4)
self.assertEqual(got, [4, 3])
got.extend([chan.recv(), chan.recv()])
self.assertEqual(got, [4, 3, 2, 1])
def test_recv_and_send_with_room_do_not_block(self):
resultschan = gochans.BufferedChannel(5)
endchan = gochans.SyncChannel()
def square(x):
return x * x
def func():
for num in range(5):
resultschan.send(square(num))
endchan.send()
goless.go(func)
# Waiting on the endchan tells us our results are
# queued up in resultschan
endchan.recv()
got = [resultschan.recv() for _ in range(5)]
ideal = [square(i) for i in range(5)]
self.assertEqual(got, ideal)
def makechan(self):
return gochans.BufferedChannel(2)