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'''Tests for WindowsConsoleIO
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'''
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import io
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import os
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import sys
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import tempfile
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import unittest
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from test import support
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if sys.platform != 'win32':
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raise unittest.SkipTest("test only relevant on win32")
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from _testconsole import write_input
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ConIO = io._WindowsConsoleIO
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class WindowsConsoleIOTests(unittest.TestCase):
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def test_abc(self):
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self.assertTrue(issubclass(ConIO, io.RawIOBase))
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self.assertFalse(issubclass(ConIO, io.BufferedIOBase))
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self.assertFalse(issubclass(ConIO, io.TextIOBase))
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def test_open_fd(self):
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self.assertRaisesRegex(ValueError,
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"negative file descriptor", ConIO, -1)
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fd, _ = tempfile.mkstemp()
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try:
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# Windows 10: "Cannot open non-console file"
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# Earlier: "Cannot open console output buffer for reading"
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self.assertRaisesRegex(ValueError,
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"Cannot open (console|non-console file)", ConIO, fd)
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finally:
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os.close(fd)
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try:
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f = ConIO(0)
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except ValueError:
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# cannot open console because it's not a real console
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pass
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else:
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self.assertTrue(f.readable())
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self.assertFalse(f.writable())
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self.assertEqual(0, f.fileno())
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f.close() # multiple close should not crash
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f.close()
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try:
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f = ConIO(1, 'w')
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except ValueError:
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# cannot open console because it's not a real console
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pass
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else:
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self.assertFalse(f.readable())
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self.assertTrue(f.writable())
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self.assertEqual(1, f.fileno())
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f.close()
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f.close()
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try:
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f = ConIO(2, 'w')
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except ValueError:
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# cannot open console because it's not a real console
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pass
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else:
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self.assertFalse(f.readable())
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self.assertTrue(f.writable())
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self.assertEqual(2, f.fileno())
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f.close()
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f.close()
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def test_open_name(self):
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self.assertRaises(ValueError, ConIO, sys.executable)
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f = ConIO("CON")
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self.assertTrue(f.readable())
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self.assertFalse(f.writable())
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self.assertIsNotNone(f.fileno())
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f.close() # multiple close should not crash
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f.close()
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f = ConIO('CONIN$')
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self.assertTrue(f.readable())
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self.assertFalse(f.writable())
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self.assertIsNotNone(f.fileno())
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f.close()
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f.close()
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f = ConIO('CONOUT$', 'w')
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self.assertFalse(f.readable())
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self.assertTrue(f.writable())
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self.assertIsNotNone(f.fileno())
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f.close()
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f.close()
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f = open('C:/con', 'rb', buffering=0)
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self.assertIsInstance(f, ConIO)
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f.close()
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@unittest.skipIf(sys.getwindowsversion()[:2] <= (6, 1),
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"test does not work on Windows 7 and earlier")
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def test_conin_conout_names(self):
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f = open(r'\\.\conin$', 'rb', buffering=0)
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self.assertIsInstance(f, ConIO)
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f.close()
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f = open('//?/conout$', 'wb', buffering=0)
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self.assertIsInstance(f, ConIO)
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f.close()
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def test_conout_path(self):
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temp_path = tempfile.mkdtemp()
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self.addCleanup(support.rmtree, temp_path)
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conout_path = os.path.join(temp_path, 'CONOUT$')
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with open(conout_path, 'wb', buffering=0) as f:
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if sys.getwindowsversion()[:2] > (6, 1):
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self.assertIsInstance(f, ConIO)
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else:
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self.assertNotIsInstance(f, ConIO)
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def test_write_empty_data(self):
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with ConIO('CONOUT$', 'w') as f:
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self.assertEqual(f.write(b''), 0)
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def assertStdinRoundTrip(self, text):
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stdin = open('CONIN$', 'r')
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old_stdin = sys.stdin
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try:
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sys.stdin = stdin
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write_input(
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stdin.buffer.raw,
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(text + '\r\n').encode('utf-16-le', 'surrogatepass')
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)
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actual = input()
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finally:
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sys.stdin = old_stdin
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self.assertEqual(actual, text)
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def test_input(self):
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# ASCII
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self.assertStdinRoundTrip('abc123')
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# Non-ASCII
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self.assertStdinRoundTrip('ϼўТλФЙ')
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# Combining characters
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self.assertStdinRoundTrip('A͏B ﬖ̳AA̝')
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# Non-BMP
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self.assertStdinRoundTrip('\U00100000\U0010ffff\U0010fffd')
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def test_partial_reads(self):
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# Test that reading less than 1 full character works when stdin
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# contains multibyte UTF-8 sequences
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source = 'ϼўТλФЙ\r\n'.encode('utf-16-le')
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expected = 'ϼўТλФЙ\r\n'.encode('utf-8')
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for read_count in range(1, 16):
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with open('CONIN$', 'rb', buffering=0) as stdin:
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write_input(stdin, source)
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actual = b''
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while not actual.endswith(b'\n'):
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b = stdin.read(read_count)
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actual += b
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self.assertEqual(actual, expected, 'stdin.read({})'.format(read_count))
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def test_partial_surrogate_reads(self):
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# Test that reading less than 1 full character works when stdin
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# contains surrogate pairs that cannot be decoded to UTF-8 without
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# reading an extra character.
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source = '\U00101FFF\U00101001\r\n'.encode('utf-16-le')
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expected = '\U00101FFF\U00101001\r\n'.encode('utf-8')
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for read_count in range(1, 16):
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with open('CONIN$', 'rb', buffering=0) as stdin:
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write_input(stdin, source)
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actual = b''
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while not actual.endswith(b'\n'):
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b = stdin.read(read_count)
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actual += b
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self.assertEqual(actual, expected, 'stdin.read({})'.format(read_count))
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def test_ctrl_z(self):
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with open('CONIN$', 'rb', buffering=0) as stdin:
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source = '\xC4\x1A\r\n'.encode('utf-16-le')
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expected = '\xC4'.encode('utf-8')
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write_input(stdin, source)
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a, b = stdin.read(1), stdin.readall()
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self.assertEqual(expected[0:1], a)
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self.assertEqual(expected[1:], b)
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if __name__ == "__main__":
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unittest.main()
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