From: Ben Darnell <ben@bendarnell.com>
Date: Tue, 9 Dec 2025 17:10:18 +0000 (-0500)
Subject: process_test: Use isolated mode for subprocess tests
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=00dd0802eb60e2c01a40b1b5308596364709abc6;p=thirdparty%2Ftornado.git

process_test: Use isolated mode for subprocess tests

Prompt customizations (notably the PYTHONSTARTUP file used by
vscode's terminal integration) can interfere with tests that run
interactive interpreters in a subprocess. Run those interpreters
in isolated mode to avoid this problem.)
---

diff --git a/tornado/test/process_test.py b/tornado/test/process_test.py
index 0fdb9418..1c5cff32 100644
--- a/tornado/test/process_test.py
+++ b/tornado/test/process_test.py
@@ -141,7 +141,7 @@ class SubprocessTest(AsyncTestCase):
     @gen_test
     def test_subprocess(self):
         subproc = Subprocess(
-            [sys.executable, "-u", "-i"],
+            [sys.executable, "-u", "-i", "-I"],
             stdin=Subprocess.STREAM,
             stdout=Subprocess.STREAM,
             stderr=subprocess.STDOUT,
@@ -163,7 +163,7 @@ class SubprocessTest(AsyncTestCase):
     def test_close_stdin(self):
         # Close the parent's stdin handle and see that the child recognizes it.
         subproc = Subprocess(
-            [sys.executable, "-u", "-i"],
+            [sys.executable, "-u", "-i", "-I"],
             stdin=Subprocess.STREAM,
             stdout=Subprocess.STREAM,
             stderr=subprocess.STDOUT,