gh-132742: Fix tcflush() tests on Android

Author: serhiy-storchaka

Lib/test/test_ioctl.py

@@ -143,7 +143,9 @@ def setUp(self):
     def test_ioctl_clear_input_or_output(self):
         wfd = self.slave_fd
         rfd = self.master_fd
-        inbuf = sys.platform == 'linux'
+        # The data is buffered in input buffer on Linux, and in
+        # output buffer on other platforms.
+        inbuf = sys.platform in ('linux', 'android')
 
         os.write(wfd, b'abcdef')
         self.assertEqual(os.read(rfd, 2), b'ab')
@@ -163,7 +165,7 @@ def test_ioctl_clear_input_or_output(self):
         os.write(wfd, b'ABCDEF')
         self.assertEqual(os.read(rfd, 1024), b'ABCDEF')
 
-    @unittest.skipUnless(sys.platform == 'linux', 'only works on Linux')
+    @unittest.skipUnless(sys.platform in ('linux', 'android'), 'only works on Linux')
     @unittest.skipUnless(hasattr(termios, 'TCXONC'), 'requires termios.TCXONC')
     def test_ioctl_suspend_and_resume_output(self):
         wfd = self.slave_fd

Lib/test/test_termios.py

@@ -152,7 +152,9 @@ def test_tcflush_errors(self):
     def test_tcflush_clear_input_or_output(self):
         wfd = self.fd
         rfd = self.master_fd
-        inbuf = sys.platform == 'linux'
+        # The data is buffered in input buffer on Linux, and in
+        # output buffer on other platforms.
+        inbuf = sys.platform in ('linux', 'android')
 
         os.write(wfd, b'abcdef')
         self.assertEqual(os.read(rfd, 2), b'ab')
@@ -190,7 +192,8 @@ def test_tcflow_errors(self):
         self.assertRaises(TypeError, termios.tcflow, object(), termios.TCOON)
         self.assertRaises(TypeError, termios.tcflow, self.fd)
 
-    @unittest.skipUnless(sys.platform == 'linux', 'only works on Linux')
+    @support.skip_android_selinux('tcflow')
+    @unittest.skipUnless(sys.platform in ('linux', 'android'), 'only works on Linux')
     def test_tcflow_suspend_and_resume_output(self):
         wfd = self.fd
         rfd = self.master_fd