From a1d75625e46bf19452365ce5f4ec5be960130fbf Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Mon, 24 Feb 2025 13:08:23 -0500
Subject: [PATCH] Draft test-doc for "out-of-band" `asyncio.Task`..

Since there's no way to activate `greenback`'s portal in such cases, we
should at least have a test verifying our very loud error about the
inability to support this usage..
---
 tests/conftest.py                      | 12 ++++++++++++
 tests/devx/test_pause_from_non_trio.py | 25 +++++++++++++++++++++++--
 2 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/tests/conftest.py b/tests/conftest.py
index 5ce8442..810b642 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -150,6 +150,18 @@ def pytest_generate_tests(metafunc):
         metafunc.parametrize("start_method", [spawn_backend], scope='module')
 
 
+# TODO: a way to let test scripts (like from `examples/`)
+# guarantee they won't registry addr collide!
+# @pytest.fixture
+# def open_test_runtime(
+#     reg_addr: tuple,
+# ) -> AsyncContextManager:
+#     return partial(
+#         tractor.open_nursery,
+#         registry_addrs=[reg_addr],
+#     )
+
+
 def sig_prog(proc, sig):
     "Kill the actor-process with ``sig``."
     proc.send_signal(sig)
diff --git a/tests/devx/test_pause_from_non_trio.py b/tests/devx/test_pause_from_non_trio.py
index f3fd15a..3a7140e 100644
--- a/tests/devx/test_pause_from_non_trio.py
+++ b/tests/devx/test_pause_from_non_trio.py
@@ -218,10 +218,9 @@ def expect_any_of(
         )
 
     return expected_patts
-    # yield child
 
 
-def test_pause_from_asyncio_task(
+def test_sync_pause_from_aio_task(
     spawn,
     ctlc: bool
     # ^TODO, fix for `asyncio`!!
@@ -327,3 +326,25 @@ def test_pause_from_asyncio_task(
 
     child.sendline('c')
     child.expect(EOF)
+
+
+def test_sync_pause_from_non_greenbacked_aio_task():
+    '''
+    Where the `breakpoint()` caller task is NOT spawned by
+    `tractor.to_asyncio` and thus never activates
+    a `greenback.ensure_portal()` beforehand, presumably bc the task
+    was started by some lib/dep as in often seen in the field.
+
+    Ensure sync pausing works when the pause is in,
+
+    - the root actor running in infected-mode?
+      |_ since we don't need any IPC to acquire the debug lock?
+      |_ is there some way to handle this like the non-main-thread case?
+
+    All other cases need to error out appropriately right?
+
+    - for any subactor we can't avoid needing the repl lock..
+      |_ is there a way to hook into `asyncio.ensure_future(obj)`?
+
+    '''
+    pass