'''Tests for WindowsConsoleIO
'''
import io
import os
import sys
import tempfile
import unittest
from test.support import os_helper, requires_resource
if sys.platform != 'win32':
raise unittest.SkipTest("test only relevant on win32")
from _testconsole import write_input
ConIO = io._WindowsConsoleIO
class WindowsConsoleIOTests(unittest.TestCase):
def test_abc(self):
self.assertTrue(issubclass(ConIO, io.RawIOBase))
self.assertFalse(issubclass(ConIO, io.BufferedIOBase))
self.assertFalse(issubclass(ConIO, io.TextIOBase))
def test_open_fd(self):
self.assertRaisesRegex(ValueError,
"negative file descriptor", ConIO, -1)
with tempfile.TemporaryFile() as tmpfile:
fd = tmpfile.fileno()
# Windows 10: "Cannot open non-console file"
# Earlier: "Cannot open console output buffer for reading"
self.assertRaisesRegex(ValueError,
"Cannot open (console|non-console file)", ConIO, fd)
try:
f = ConIO(0)
except ValueError:
# cannot open console because it's not a real console
pass
else:
self.assertTrue(f.readable())
self.assertFalse(f.writable())
self.assertEqual(0, f.fileno())
f.close() # multiple close should not crash
f.close()
with self.assertWarns(RuntimeWarning):
with ConIO(False):
pass
try:
f = ConIO(1, 'w')
except ValueError:
# cannot open console because it's not a real console
pass
else:
self.assertFalse(f.readable())
self.assertTrue(f.writable())
self.assertEqual(1, f.fileno())
f.close()
f.close()
with self.assertWarns(RuntimeWarning):
with ConIO(False):
pass
try:
f = ConIO(2, 'w')
except ValueError:
# cannot open console because it's not a real console
pass
else:
self.assertFalse(f.readable())
self.assertTrue(f.writable())
self.assertEqual(2, f.fileno())
f.close()
f.close()
def test_open_name(self):
self.assertRaises(ValueError, ConIO, sys.executable)
f = ConIO("CON")
self.assertTrue(f.readable())
self.assertFalse(f.writable())
self.assertIsNotNone(f.fileno())
f.close() # multiple close should not crash
f.close()
f = ConIO('CONIN$')
self.assertTrue(f.readable())
self.assertFalse(f.writable())
self.assertIsNotNone(f.fileno())
f.close()
f.close()
f = ConIO('CONOUT$', 'w')
self.assertFalse(f.readable())
self.assertTrue(f.writable())
self.assertIsNotNone(f.fileno())
f.close()
f.close()
# bpo-45354: Windows 11 changed MS-DOS device name handling
if sys.getwindowsversion()[:3] < (10, 0, 22000):
f = open('C:/con', 'rb', buffering=0)
self.assertIsInstance(f, ConIO)
f.close()
def test_subclass_repr(self):
class TestSubclass(ConIO):
pass
f = TestSubclass("CON")
with f:
self.assertIn(TestSubclass.__name__, repr(f))
self.assertIn(TestSubclass.__name__, repr(f))
@unittest.skipIf(sys.getwindowsversion()[:2] <= (6, 1),
"test does not work on Windows 7 and earlier")
def test_conin_conout_names(self):
f = open(r'\\.\conin$', 'rb', buffering=0)
self.assertIsInstance(f, ConIO)
f.close()
f = open('//?/conout$', 'wb', buffering=0)
self.assertIsInstance(f, ConIO)
f.close()
def test_conout_path(self):
temp_path = tempfile.mkdtemp()
self.addCleanup(os_helper.rmtree, temp_path)
conout_path = os.path.join(temp_path, 'CONOUT$')
with open(conout_path, 'wb', buffering=0) as f:
# bpo-45354: Windows 11 changed MS-DOS device name handling
if (6, 1) < sys.getwindowsversion()[:3] < (10, 0, 22000):
self.assertIsInstance(f, ConIO)
else:
self.assertNotIsInstance(f, ConIO)
def test_write_empty_data(self):
with ConIO('CONOUT$', 'w') as f:
self.assertEqual(f.write(b''), 0)
@requires_resource('console')
def test_write(self):
testcases = []
with ConIO('CONOUT$', 'w') as f:
for a in [
b'',
b'abc',
b'\xc2\xa7\xe2\x98\x83\xf0\x9f\x90\x8d',
b'\xff'*10,
]:
for b in b'\xc2\xa7', b'\xe2\x98\x83', b'\xf0\x9f\x90\x8d':
testcases.append(a + b)
for i in range(1, len(b)):
data = a + b[:i]
testcases.append(data + b'z')
testcases.append(data + b'\xff')
# incomplete multibyte sequence
with self.subTest(data=data):
self.assertEqual(f.write(data), len(a))
for data in testcases:
with self.subTest(data=data):
self.assertEqual(f.write(data), len(data))
def assertStdinRoundTrip(self, text):
stdin = open('CONIN$', 'r')
old_stdin = sys.stdin
try:
sys.stdin = stdin
write_input(
stdin.buffer.raw,
(text + '\r\n').encode('utf-16-le', 'surrogatepass')
)
actual = input()
finally:
sys.stdin = old_stdin
self.assertEqual(actual, text)
@requires_resource('console')
def test_input(self):
# ASCII
self.assertStdinRoundTrip('abc123')
# Non-ASCII
self.assertStdinRoundTrip('ϼўТλФЙ')
# Combining characters
self.assertStdinRoundTrip('A͏B ﬖ̳AA̝')
# bpo-38325
@unittest.skipIf(True, "Handling Non-BMP characters is broken")
def test_input_nonbmp(self):
# Non-BMP
self.assertStdinRoundTrip('\U00100000\U0010ffff\U0010fffd')
@requires_resource('console')
def test_partial_reads(self):
# Test that reading less than 1 full character works when stdin
# contains multibyte UTF-8 sequences
source = 'ϼўТλФЙ\r\n'.encode('utf-16-le')
expected = 'ϼўТλФЙ\r\n'.encode('utf-8')
for read_count in range(1, 16):
with open('CONIN$', 'rb', buffering=0) as stdin:
write_input(stdin, source)
actual = b''
while not actual.endswith(b'\n'):
b = stdin.read(read_count)
actual += b
self.assertEqual(actual, expected, 'stdin.read({})'.format(read_count))
# bpo-38325
@unittest.skipIf(True, "Handling Non-BMP characters is broken")
def test_partial_surrogate_reads(self):
# Test that reading less than 1 full character works when stdin
# contains surrogate pairs that cannot be decoded to UTF-8 without
# reading an extra character.
source = '\U00101FFF\U00101001\r\n'.encode('utf-16-le')
expected = '\U00101FFF\U00101001\r\n'.encode('utf-8')
for read_count in range(1, 16):
with open('CONIN$', 'rb', buffering=0) as stdin:
write_input(stdin, source)
actual = b''
while not actual.endswith(b'\n'):
b = stdin.read(read_count)
actual += b
self.assertEqual(actual, expected, 'stdin.read({})'.format(read_count))
@requires_resource('console')
def test_ctrl_z(self):
with open('CONIN$', 'rb', buffering=0) as stdin:
source = '\xC4\x1A\r\n'.encode('utf-16-le')
expected = '\xC4'.encode('utf-8')
write_input(stdin, source)
a, b = stdin.read(1), stdin.readall()
self.assertEqual(expected[0:1], a)
self.assertEqual(expected[1:], b)
if __name__ == "__main__":
unittest.main()
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