add test script

Author: ニヒル デ フーン ( Michiel de Hoon )

Lib/test/test_tkinter/test_tkinter_stdin_pipe.py

@@ -0,0 +1,34 @@
+import unittest
+import subprocess
+import sys
+from test import support
+from test.support import import_helper
+
+tkinter = import_helper.import_module("tkinter")
+
+
+@unittest.skipUnless(support.has_subprocess_support, "test requires subprocess")
+class TkStdinPipe(unittest.TestCase):
+
+    def test_pipe_stdin(self):
+        proc = subprocess.Popen([sys.executable, "-i"],
+                                 stdin=subprocess.PIPE,
+                                 stdout=subprocess.PIPE,
+                                 stderr=subprocess.PIPE)
+        proc.stdin.write(b"import tkinter\n")
+        proc.stdin.write(b"interpreter = tkinter.Tcl()\n")
+        proc.stdin.write(b"print('hello')\n")
+        proc.stdin.write(b"quit()\n")
+
+        stdout, stderr = proc.communicate()
+        stdout = stdout.decode()
+        stderr = stderr.decode()
+
+        if proc.returncode != 0:
+            self.fail(f"Child exited with {proc.returncode}\nSTDOUT:\n{out}\nSTDERR:\n{err}")
+
+        self.assertEqual(stdout.rstrip(), "hello")
+
+
+if __name__ == "__main__":
+    unittest.main()