test(node): run the connection processes on Windows, source and frozen

Connection processes and the larger UDP receive buffer were written and
measured on Linux; nothing had run on Windows, and `meshbay-node.exe
webrtc-worker` had never run from a frozen build on any system.

- test_connection_processes.py failed on Windows (8 tests): the selector
  loop the suite uses there cannot start a process. A test marked
  `daemon_loop` now runs on the daemon's own loop, chosen through
  pytest-asyncio's loop factories.
- The build starts both frozen executables as connection processes and
  carries a connection through each (smoke-connection-process.py). The
  daemon's own smoke test never signs in to a hub, which is when the
  processes start.
- The warning for a receive buffer below what was asked named
  net.core.rmem_max on every system; it names it on Linux only. Windows
  grants the 4 MB.

Measured on an installed build in service mode, docs/WINDOWS-PORT.md §5.12:
two processes at startup and on a live change, a browser's handshake, chat,
a 200 MB download over 8 connections across both processes, an upload, a
video stream, and stop, restart and start leaving no process behind.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/packages/meshbay-node/tests/test_packaging_win.py b/packages/meshbay-node/tests/test_packaging_win.py
index 6f6388e..69eefc8 100644
--- a/packages/meshbay-node/tests/test_packaging_win.py
+++ b/packages/meshbay-node/tests/test_packaging_win.py
@@ -369,6 +369,30 @@ def test_the_build_starts_the_frozen_daemon_not_only_its_help():
     assert 'url      = "http://127.0.0.1:1"' in smoke
 
 
+def test_the_build_starts_a_frozen_connection_process():
+    """Above one `connection_processes` a frozen node starts copies of itself,
+    `meshbay-node.exe webrtc-worker`. No source checkout takes that path and
+    the daemon's smoke test stops short of it: it never signs in to a hub,
+    which is when the processes start."""
+    build = (WIN / "build-node-runtime.ps1").read_text(encoding="utf-8")
+    step = build.split("smoke test: the frozen node as a connection process", 1)[1]
+    assert 'smoke-connection-process.py") $exe (Join-Path $OutDir "meshbay-nodew.exe")' in step
+    assert "if ($LASTEXITCODE -ne 0) { throw" in step
+    # The other end is the node's own modules, in the build interpreter: removed
+    # any earlier, the step has nothing to run with.
+    assert build.count("Remove-Item -Recurse -Force $BuildVenv") == 1
+    assert "Remove-Item -Recurse -Force $BuildVenv" in step
+
+    smoke = (WIN / "smoke-connection-process.py").read_text(encoding="utf-8")
+    assert 'workers._argv = lambda: [exe, "webrtc-worker"]' in smoke
+    # The words a frozen node starts itself with, and the ones it answers to.
+    node = ROOT / "packages" / "meshbay-node" / "src" / "meshbay_node"
+    assert 'return [sys.executable, "webrtc-worker"]' in (
+        node / "transport" / "webrtc" / "workers.py").read_text(encoding="utf-8")
+    assert 'if sys.argv[1:2] == ["webrtc-worker"]:' in (
+        node / "daemon.py").read_text(encoding="utf-8")
+
+
 def _run_stop_node(tmp_path, dummy_name, localappdata):
     """stop-node.ps1 as setup runs it, with the process and task names swapped
     for ones that belong to this test -- the real ones would stop the