Add initial infected asyncio error propagation test

tests/test_infected_asyncio.py

@@ -0,0 +1,22 @@
+import asyncio
+
+import pytest
+import tractor
+
+async def sleep_and_err():
+    await asyncio.sleep(0.1)
+    assert 0
+
+
+async def trio_main():
+    await tractor.to_asyncio.run_task(sleep_and_err)
+
+
+def test_infected_simple_error(arb_addr):
+
+    async def main():
+        async with tractor.open_nursery() as n:
+            await n.run_in_actor('asyncio_actor', trio_main, infected_asyncio=True)
+
+    with pytest.raises(tractor.RemoteActorError) as excinfo:
+        tractor.run(main, arbiter_addr=arb_addr)