Verify subs topics at each step

tests/test_local.py

@@ -7,7 +7,6 @@ import pytest
 import trio
 import tractor
 
-
 from conftest import tractor_test
 
 

tests/test_pubsub.py

@@ -1,3 +1,4 @@
+import time
 from functools import partial
 from itertools import cycle
 
@@ -14,13 +15,18 @@ def is_even(i):
 
 @tractor.msg.pub
 async def pubber(get_topics):
+    ss = tractor.current_actor().statespace
+
     for i in cycle(range(10)):
-        topics = get_topics()
+
+        # ensure topic subscriptions are as expected
+        ss['get_topics'] = get_topics
+
         yield {'even' if is_even(i) else 'odd': i}
         await trio.sleep(0.1)
 
 
-async def subs(which):
+async def subs(which, pub_actor_name):
     if len(which) == 1:
         if which[0] == 'even':
             pred = is_even
@@ -29,7 +35,7 @@ async def subs(which):
     else:
         pred = lambda i: isinstance(i, int)
 
-    async with tractor.find_actor('streamer') as portal:
+    async with tractor.find_actor(pub_actor_name) as portal:
         agen = await portal.run(__name__, 'pubber', topics=which)
         async with aclosing(agen) as agen:
             async for pkt in agen:
@@ -37,25 +43,60 @@ async def subs(which):
                     assert pred(value)
 
 
+@pytest.mark.parametrize(
+    'pub_actor',
+    ['streamer', 'arbiter']
+)
 def test_pubsub_multi_actor_subs(
     loglevel,
     arb_addr,
+    pub_actor,
 ):
+    """Try out the neato @pub decorator system.
+    """
     async def main():
+        ss = tractor.current_actor().statespace
+
         async with tractor.open_nursery() as n:
+
+            name = 'arbiter'
+
+            if pub_actor is 'streamer':
                 # start the publisher as a daemon
                 master_portal = await n.start_actor(
                     'streamer',
                     rpc_module_paths=[__name__],
                 )
 
-            even_portal = await n.run_in_actor('evens', subs, which=['even'])
-            odd_portal = await n.run_in_actor('odds', subs, which=['odd'])
+            even_portal = await n.run_in_actor(
+                'evens', subs, which=['even'], pub_actor_name=name)
+            odd_portal = await n.run_in_actor(
+                'odds', subs, which=['odd'], pub_actor_name=name)
+
+            async with tractor.wait_for_actor('evens'):
+                # block until 2nd actor is initialized
+                pass
+
+            if pub_actor is 'arbiter':
+                # wait for publisher task to be spawned in a local RPC task
+                while not ss.get('get_topics'):
+                    await trio.sleep(0.1)
+
+                get_topics = ss.get('get_topics')
+
+                assert 'even' in get_topics()
 
             async with tractor.wait_for_actor('odds'):
                 # block until 2nd actor is initialized
                 pass
 
+            if pub_actor is 'arbiter':
+                start = time.time()
+                while 'odd' not in get_topics():
+                    await trio.sleep(0.1)
+                    if time.time() - start > 1:
+                        pytest.fail("odds subscription never arrived?")
+
             # TODO: how to make this work when the arbiter gets
             # a portal to itself? Currently this causes a hang
             # when the channel server is torn down due to a lingering
@@ -67,11 +108,22 @@ def test_pubsub_multi_actor_subs(
             # blocking due to actor never terminating loop
             # await even_portal.result()
 
-            await trio.sleep(1)
+            await trio.sleep(0.5)
             await even_portal.cancel_actor()
-            await trio.sleep(1)
-            await odd_portal.cancel_actor()
+            await trio.sleep(0.5)
 
+            if pub_actor is 'arbiter':
+                assert 'even' not in get_topics()
+
+            await odd_portal.cancel_actor()
+            await trio.sleep(1)
+
+            if pub_actor is 'arbiter':
+                while get_topics():
+                    await trio.sleep(0.1)
+                    if time.time() - start > 1:
+                        pytest.fail("odds subscription never dropped?")
+            else:
                 await master_portal.cancel_actor()
 
     tractor.run(