#17484: Actually add the getpass tests this time.

Lib/test/test_getpass.py

+import getpass
+import os
+import termios
+import unittest
+from io import StringIO
+from unittest import mock
+from test import support
+
+@mock.patch('os.environ')
+class GetpassGetuserTest(unittest.TestCase):
+
+    def test_username_takes_username_from_env(self, environ):
+        expected_name = 'some_name'
+        environ.get.return_value = expected_name
+        self.assertEqual(expected_name, getpass.getuser())
+
+    def test_username_priorities_of_env_values(self, environ):
+        environ.get.return_value = None
+        getpass.getuser()
+        self.assertEqual(
+            environ.get.call_args_list,
+            [mock.call(x) for x in ('LOGNAME', 'USER', 'LNAME', 'USERNAME')])
+
+    def test_username_falls_back_to_pwd(self, environ):
+        expected_name = 'some_name'
+        environ.get.return_value = None
+        with mock.patch('os.getuid') as uid, \
+                mock.patch('pwd.getpwuid') as getpw:
+            uid.return_value = 42
+            getpw.return_value = [expected_name]
+            self.assertEqual(expected_name,
+                             getpass.getuser())
+            getpw.assert_called_once_with(42)
+
+
+class GetpassRawinputTest(unittest.TestCase):
+
+    def test_flushes_stream_after_prompt(self):
+        # see issue 1703
+        stream = mock.Mock(spec=StringIO)
+        input = StringIO('input_string')
+        getpass._raw_input('some_prompt', stream, input=input)
+        stream.flush.assert_called_once_with()
+
+    def test_uses_stderr_as_default(self):
+        input = StringIO('input_string')
+        prompt = 'some_prompt'
+        with mock.patch('sys.stderr') as stderr:
+            getpass._raw_input(prompt, input=input)
+            stderr.write.assert_called_once_with(prompt)
+
+    @mock.patch('sys.stdin')
+    def test_uses_stdin_as_default_input(self, mock_input):
+        mock_input.readline.return_value = 'input_string'
+        getpass._raw_input(stream=StringIO())
+        mock_input.readline.assert_called_once_with()
+
+    def test_raises_on_empty_input(self):
+        input = StringIO('')
+        self.assertRaises(EOFError, getpass._raw_input, input=input)
+
+    def test_trims_trailing_newline(self):
+        input = StringIO('test\n')
+        self.assertEqual('test', getpass._raw_input(input=input))
+
+
+# Some of these tests are a bit white-box.  The functional requirement is that
+# the password input be taken directly from the tty, and that it not be echoed
+# on the screen, unless we are falling back to stderr/stdin.
+
+# Some of these might run on other platforms, but play it safe.
+@unittest.skipUnless(os.name == 'posix',
+                     'tests are for the unix version of getpass')
+class UnixGetpassTest(unittest.TestCase):
+
+    def test_uses_tty_directly(self):
+        with mock.patch('os.open') as open, \
+                mock.patch('os.fdopen'):
+            # By setting open's return value to None the implementation will
+            # skip code we don't care about in this test.  We can mock this out
+            # fully if an alternate implementation works differently.
+            open.return_value = None
+            getpass.unix_getpass()
+            open.assert_called_once_with('/dev/tty',
+                                         os.O_RDWR | os.O_NOCTTY)
+
+    def test_resets_termios(self):
+        with mock.patch('os.open') as open, \
+                mock.patch('os.fdopen'), \
+                mock.patch('termios.tcgetattr') as tcgetattr, \
+                mock.patch('termios.tcsetattr') as tcsetattr:
+            open.return_value = 3
+            fake_attrs = [255, 255, 255, 255, 255]
+            tcgetattr.return_value = list(fake_attrs)
+            getpass.unix_getpass()
+            tcsetattr.assert_called_with(3, mock.ANY, fake_attrs)
+
+    def test_falls_back_to_fallback_if_termios_raises(self):
+        with mock.patch('os.open') as open, \
+                mock.patch('os.fdopen') as fdopen, \
+                mock.patch('termios.tcgetattr'), \
+                mock.patch('termios.tcsetattr') as tcsetattr, \
+                mock.patch('getpass.fallback_getpass') as fallback:
+            open.return_value = 3
+            fdopen.return_value = StringIO()
+            tcsetattr.side_effect = termios.error
+            getpass.unix_getpass()
+            fallback.assert_called_once_with('Password: ',
+                                             fdopen.return_value)
+
+    def test_flushes_stream_after_input(self):
+        # issue 7208
+        with mock.patch('os.open') as open, \
+                mock.patch('os.fdopen'), \
+                mock.patch('termios.tcgetattr'), \
+                mock.patch('termios.tcsetattr'):
+            open.return_value = 3
+            mock_stream = mock.Mock(spec=StringIO)
+            getpass.unix_getpass(stream=mock_stream)
+            mock_stream.flush.assert_called_with()
+
+    def test_falls_back_to_stdin(self):
+        with mock.patch('os.open') as os_open, \
+                mock.patch('sys.stdin', spec=StringIO) as stdin:
+            os_open.side_effect = IOError
+            stdin.fileno.side_effect = AttributeError
+            with support.captured_stderr() as stderr:
+                with self.assertWarns(getpass.GetPassWarning):
+                    getpass.unix_getpass()
+            stdin.readline.assert_called_once_with()
+            self.assertIn('Warning', stderr.getvalue())
+            self.assertIn('Password:', stderr.getvalue())
+
+
+if __name__ == "__main__":
+    unittest.main()