Merge pull request #226 from goodboy/debugger_test_tweaks

Debugger tests determinism

examples/asynchronous_generators.py

@@ -1,23 +1,20 @@
+from typing import AsyncIterator
 from itertools import repeat
+
 import trio
 import tractor
 
-tractor.log.get_console_log("INFO")
 
+async def stream_forever() -> AsyncIterator[int]:
 
-async def stream_forever():
     for i in repeat("I can see these little future bubble things"):
-        # each yielded value is sent over the ``Channel`` to the
+        # each yielded value is sent over the ``Channel`` to the parent actor
-        # parent actor
         yield i
         await trio.sleep(0.01)
 
 
 async def main():
 
-    # stream for at most 1 seconds
-    with trio.move_on_after(1) as cancel_scope:
-
     async with tractor.open_nursery() as n:
 
         portal = await n.start_actor(
@@ -28,12 +25,17 @@ async def main():
         # this async for loop streams values from the above
         # async generator running in a separate process
         async with portal.open_stream_from(stream_forever) as stream:
+            count = 0
             async for letter in stream:
                 print(letter)
+                count += 1
 
-    # we support trio's cancellation system
+                if count > 50:
-    assert cancel_scope.cancelled_caught
+                    break
-    assert n.cancelled
+
+        print('stream terminated')
+
+        await portal.cancel_actor()
 
 
 if __name__ == '__main__':

tests/test_debugger.py

@@ -422,26 +422,21 @@ def test_multi_nested_subactors_error_through_nurseries(spawn):
 
     child = spawn('multi_nested_subactors_error_up_through_nurseries')
 
+    timed_out_early: bool = False
+
     for i in range(12):
         try:
             child.expect(r"\(Pdb\+\+\)")
             child.sendline('c')
             time.sleep(0.1)
 
-        except (
+        except pexpect.exceptions.EOF:
-            pexpect.exceptions.EOF,
-            pexpect.exceptions.TIMEOUT,
-        ):
-            # races all over..
-
-            print(f"Failed early on {i}?")
-            before = str(child.before.decode())
-
-            timed_out_early = True
 
             # race conditions on how fast the continue is sent?
+            print(f"Failed early on {i}?")
+            timed_out_early = True
             break
-
+    else:
         child.expect(pexpect.EOF)
 
     if not timed_out_early:
@@ -499,6 +494,7 @@ def test_root_nursery_cancels_before_child_releases_tty_lock(
             child.expect(pexpect.EOF)
             break
         except pexpect.exceptions.TIMEOUT:
+            child.sendline('c')
             print('child was able to grab tty lock again?')
 
     if not timed_out_early:

tractor/_root.py

@@ -17,6 +17,7 @@ from . import _spawn
 from . import _state
 from . import log
 from ._ipc import _connect_chan
+from ._exceptions import is_multi_cancelled
 
 
 # set at startup and after forks
@@ -177,7 +178,7 @@ async def open_root_actor(
 
                 entered = await _debug._maybe_enter_pm(err)
 
-                if not entered:
+                if not entered and not is_multi_cancelled(err):
                     logger.exception("Root actor crashed:")
 
                 # always re-raise

tractor/_trionics.py

@@ -281,7 +281,6 @@ async def _open_and_supervise_one_cancels_all_nursery(
                     # Instead try to wait for pdb to be released before
                     # tearing down.
                     if is_root_process():
-                        log.exception(f"we're root with {err}")
 
                         # TODO: could this make things more deterministic?
                         # wait to see if a sub-actor task will be