[3.11] gh-110388: Add tests for tty (GH-110394) (GH-110634)

(cherry picked from commit 7f702b2)

2 files changed, 61 insertions, 0 deletions

diff --git a/Lib/test/test_tty.py b/Lib/test/test_tty.py
new file mode 100644
index 0000000..ec1f340
--- /dev/null
+++ b/Lib/test/test_tty.py
@@ -0,0 +1,60 @@
+import os
+import unittest
+from test.support.import_helper import import_module
+
+termios = import_module('termios')
+tty = import_module('tty')
+
+
+@unittest.skipUnless(hasattr(os, 'openpty'), "need os.openpty()")
+class TestTty(unittest.TestCase):
+
+    def setUp(self):
+        master_fd, self.fd = os.openpty()
+        self.addCleanup(os.close, master_fd)
+        self.stream = self.enterContext(open(self.fd, 'wb', buffering=0))
+        self.fd = self.stream.fileno()
+        self.mode = termios.tcgetattr(self.fd)
+        self.addCleanup(termios.tcsetattr, self.fd, termios.TCSANOW, self.mode)
+        self.addCleanup(termios.tcsetattr, self.fd, termios.TCSAFLUSH, self.mode)
+
+    def check_cbreak(self, mode):
+        self.assertEqual(mode[3] & termios.ECHO, 0)
+        self.assertEqual(mode[3] & termios.ICANON, 0)
+        self.assertEqual(mode[6][termios.VMIN], 1)
+        self.assertEqual(mode[6][termios.VTIME], 0)
+
+    def check_raw(self, mode):
+        self.assertEqual(mode[0] & termios.ICRNL, 0)
+        self.check_cbreak(mode)
+        self.assertEqual(mode[0] & termios.ISTRIP, 0)
+        self.assertEqual(mode[0] & termios.ICRNL, 0)
+        self.assertEqual(mode[1] & termios.OPOST, 0)
+        self.assertEqual(mode[2] & termios.PARENB, termios.CS8 & termios.PARENB)
+        self.assertEqual(mode[2] & termios.CSIZE, termios.CS8 & termios.CSIZE)
+        self.assertEqual(mode[2] & termios.CS8, termios.CS8)
+        self.assertEqual(mode[3] & termios.ECHO, 0)
+        self.assertEqual(mode[3] & termios.ICANON, 0)
+        self.assertEqual(mode[3] & termios.ISIG, 0)
+        self.assertEqual(mode[6][termios.VMIN], 1)
+        self.assertEqual(mode[6][termios.VTIME], 0)
+
+    def test_setraw(self):
+        tty.setraw(self.fd)
+        mode = termios.tcgetattr(self.fd)
+        self.check_raw(mode)
+        tty.setraw(self.fd, termios.TCSANOW)
+        tty.setraw(self.stream)
+        tty.setraw(fd=self.fd, when=termios.TCSANOW)
+
+    def test_setcbreak(self):
+        tty.setcbreak(self.fd)
+        mode = termios.tcgetattr(self.fd)
+        self.check_cbreak(mode)
+        tty.setcbreak(self.fd, termios.TCSANOW)
+        tty.setcbreak(self.stream)
+        tty.setcbreak(fd=self.fd, when=termios.TCSANOW)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/Misc/NEWS.d/next/Tests/2023-10-05-14-22-48.gh-issue-110388.1-HQJO.rst b/Misc/NEWS.d/next/Tests/2023-10-05-14-22-48.gh-issue-110388.1-HQJO.rst
new file mode 100644
index 0000000..caac41f
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2023-10-05-14-22-48.gh-issue-110388.1-HQJO.rst
@@ -0,0 +1 @@
+Add tests for :mod:`tty`.