Add a test case.

Author: ZeroIntensity

Lib/test/test_interpreters/test_api.py

@@ -1,6 +1,7 @@
 import contextlib
 import os
 import pickle
+import signal
 import sys
 from textwrap import dedent
 import threading
@@ -11,7 +12,7 @@
 from test.support import os_helper
 from test.support import script_helper
 from test.support import import_helper
-from test.support.script_helper import assert_python_ok
+from test.support.script_helper import assert_python_ok, spawn_python
 # Raise SkipTest if subinterpreters not supported.
 _interpreters = import_helper.import_module('_interpreters')
 from concurrent import interpreters
@@ -434,6 +435,32 @@ def test_cleanup_in_repl(self):
         self.assertIn(b"remaining subinterpreters", stdout)
         self.assertNotIn(b"Traceback", stdout)
 
+    @support.requires_subprocess()
+    @unittest.skipIf(os.name == 'nt', "signals don't work well on windows")
+    def test_keyboard_interrupt_in_thread_running_interp(self):
+        import subprocess
+        source = f"""if True:
+        from concurrent import interpreters
+        from threading import Thread
+
+        def test():
+            import time
+            print('a', flush=True, end='')
+            time.sleep(10)
+
+        interp = interpreters.create()
+        interp.call_in_thread(test)
+        """
+
+        with spawn_python("-c", source, stderr=subprocess.PIPE) as proc:
+            self.assertEqual(proc.stdout.read(1), b'a')
+            proc.send_signal(signal.SIGINT)
+            proc.stderr.flush()
+            error = proc.stderr.read()
+            self.assertIn(b"KeyboardInterrupt", error)
+            retcode = proc.wait()
+            self.assertEqual(retcode, 0)
+
 
 
 class TestInterpreterIsRunning(TestBase):