Move get_signal_name() to test.support (#121251)

* Move get_signal_name() from test.libregrtest to test.support.
* Use get_signal_name() in support.script_helper.
* support.script_helper now decodes stdout and stderr from UTF-8,
  instead of ASCII, if a command failed.

1 files changed, 12 insertions, 0 deletions

diff --git a/Lib/test/test_support.py b/Lib/test/test_support.py
index d6f024a..e60e547 100644
--- a/Lib/test/test_support.py
+++ b/Lib/test/test_support.py
@@ -3,6 +3,7 @@ import importlib
 import io
 import os
 import shutil
+import signal
 import socket
 import stat
 import subprocess
@@ -732,6 +733,17 @@ class TestSupport(unittest.TestCase):
         self.assertEqual(support.copy_python_src_ignore(path, os.listdir(path)),
                          ignored)
 
+    def test_get_signal_name(self):
+        for exitcode, expected in (
+            (-int(signal.SIGINT), 'SIGINT'),
+            (-int(signal.SIGSEGV), 'SIGSEGV'),
+            (128 + int(signal.SIGABRT), 'SIGABRT'),
+            (3221225477, "STATUS_ACCESS_VIOLATION"),
+            (0xC00000FD, "STATUS_STACK_OVERFLOW"),
+        ):
+            self.assertEqual(support.get_signal_name(exitcode), expected,
+                             exitcode)
+
     # XXX -follows a list of untested API
     # make_legacy_pyc
     # is_resource_enabled