# -*- coding: utf-8 -*-
import unittest
from test.support import script_helper, captured_stdout, requires_subprocess, requires_resource
from test.support.os_helper import TESTFN, unlink, rmtree
from test.support.import_helper import unload
import importlib
import os
import sys
import subprocess
import tempfile
class MiscSourceEncodingTest(unittest.TestCase):
def test_import_encoded_module(self):
from test.encoded_modules import test_strings
# Make sure we're actually testing something
self.assertGreaterEqual(len(test_strings), 1)
for modname, encoding, teststr in test_strings:
mod = importlib.import_module('test.encoded_modules.'
'module_' + modname)
self.assertEqual(teststr, mod.test)
def test_compilestring(self):
# see #1882
c = compile(b"\n# coding: utf-8\nu = '\xc3\xb3'\n", "dummy", "exec")
d = {}
exec(c, d)
self.assertEqual(d['u'], '\xf3')
def test_issue2301(self):
try:
compile(b"# coding: cp932\nprint '\x94\x4e'", "dummy", "exec")
except SyntaxError as v:
self.assertEqual(v.text.rstrip('\n'), "print '\u5e74'")
else:
self.fail()
def test_issue4626(self):
c = compile("# coding=latin-1\n\u00c6 = '\u00c6'", "dummy", "exec")
d = {}
exec(c, d)
self.assertEqual(d['\xc6'], '\xc6')
def test_issue3297(self):
c = compile("a, b = '\U0001010F', '\\U0001010F'", "dummy", "exec")
d = {}
exec(c, d)
self.assertEqual(d['a'], d['b'])
self.assertEqual(len(d['a']), len(d['b']))
self.assertEqual(ascii(d['a']), ascii(d['b']))
def test_issue7820(self):
# Ensure that check_bom() restores all bytes in the right order if
# check_bom() fails in pydebug mode: a buffer starts with the first
# byte of a valid BOM, but next bytes are different
# one byte in common with the UTF-16-LE BOM
self.assertRaises(SyntaxError, eval, b'\xff\x20')
# one byte in common with the UTF-8 BOM
self.assertRaises(SyntaxError, eval, b'\xef\x20')
# two bytes in common with the UTF-8 BOM
self.assertRaises(SyntaxError, eval, b'\xef\xbb\x20')
@requires_subprocess()
def test_20731(self):
sub = subprocess.Popen([sys.executable,
os.path.join(os.path.dirname(__file__),
'tokenizedata',
'coding20731.py')],
stderr=subprocess.PIPE)
err = sub.communicate()[1]
self.assertEqual(sub.returncode, 0)
self.assertNotIn(b'SyntaxError', err)
def test_error_message(self):
compile(b'# -*- coding: iso-8859-15 -*-\n', 'dummy', 'exec')
compile(b'\xef\xbb\xbf\n', 'dummy', 'exec')
compile(b'\xef\xbb\xbf# -*- coding: utf-8 -*-\n', 'dummy', 'exec')
with self.assertRaisesRegex(SyntaxError, 'fake'):
compile(b'# -*- coding: fake -*-\n', 'dummy', 'exec')
with self.assertRaisesRegex(SyntaxError, 'iso-8859-15'):
compile(b'\xef\xbb\xbf# -*- coding: iso-8859-15 -*-\n',
'dummy', 'exec')
with self.assertRaisesRegex(SyntaxError, 'BOM'):
compile(b'\xef\xbb\xbf# -*- coding: iso-8859-15 -*-\n',
'dummy', 'exec')
with self.assertRaisesRegex(SyntaxError, 'fake'):
compile(b'\xef\xbb\xbf# -*- coding: fake -*-\n', 'dummy', 'exec')
with self.assertRaisesRegex(SyntaxError, 'BOM'):
compile(b'\xef\xbb\xbf# -*- coding: fake -*-\n', 'dummy', 'exec')
def test_bad_coding(self):
module_name = 'bad_coding'
self.verify_bad_module(module_name)
def test_bad_coding2(self):
module_name = 'bad_coding2'
self.verify_bad_module(module_name)
def verify_bad_module(self, module_name):
self.assertRaises(SyntaxError, __import__, 'test.tokenizedata.' + module_name)
path = os.path.dirname(__file__)
filename = os.path.join(path, 'tokenizedata', module_name + '.py')
with open(filename, "rb") as fp:
bytes = fp.read()
self.assertRaises(SyntaxError, compile, bytes, filename, 'exec')
def test_exec_valid_coding(self):
d = {}
exec(b'# coding: cp949\na = "\xaa\xa7"\n', d)
self.assertEqual(d['a'], '\u3047')
def test_file_parse(self):
# issue1134: all encodings outside latin-1 and utf-8 fail on
# multiline strings and long lines (>512 columns)
unload(TESTFN)
filename = TESTFN + ".py"
f = open(filename, "w", encoding="cp1252")
sys.path.insert(0, os.curdir)
try:
with f:
f.write("# -*- coding: cp1252 -*-\n")
f.write("'''A short string\n")
f.write("'''\n")
f.write("'A very long string %s'\n" % ("X" * 1000))
importlib.invalidate_caches()
__import__(TESTFN)
finally:
del sys.path[0]
unlink(filename)
unlink(filename + "c")
unlink(filename + "o")
unload(TESTFN)
rmtree('__pycache__')
def test_error_from_string(self):
# See http://bugs.python.org/issue6289
input = "# coding: ascii\n\N{SNOWMAN}".encode('utf-8')
with self.assertRaises(SyntaxError) as c:
compile(input, "<string>", "exec")
expected = "'ascii' codec can't decode byte 0xe2 in position 16: " \
"ordinal not in range(128)"
self.assertTrue(c.exception.args[0].startswith(expected),
msg=c.exception.args[0])
def test_file_parse_error_multiline(self):
# gh96611:
with open(TESTFN, "wb") as fd:
fd.write(b'print("""\n\xb1""")\n')
try:
retcode, stdout, stderr = script_helper.assert_python_failure(TESTFN)
self.assertGreater(retcode, 0)
self.assertIn(b"Non-UTF-8 code starting with '\\xb1'", stderr)
finally:
os.unlink(TESTFN)
def test_tokenizer_fstring_warning_in_first_line(self):
source = "0b1and 2"
with open(TESTFN, "w") as fd:
fd.write("{}".format(source))
try:
retcode, stdout, stderr = script_helper.assert_python_ok(TESTFN)
self.assertIn(b"SyntaxWarning: invalid binary litera", stderr)
self.assertEqual(stderr.count(source.encode()), 1)
finally:
os.unlink(TESTFN)
class AbstractSourceEncodingTest:
def test_default_coding(self):
src = (b'print(ascii("\xc3\xa4"))\n')
self.check_script_output(src, br"'\xe4'")
def test_first_coding_line(self):
src = (b'#coding:iso8859-15\n'
b'print(ascii("\xc3\xa4"))\n')
self.check_script_output(src, br"'\xc3\u20ac'")
def test_second_coding_line(self):
src = (b'#\n'
b'#coding:iso8859-15\n'
b'print(ascii("\xc3\xa4"))\n')
self.check_script_output(src, br"'\xc3\u20ac'")
def test_third_coding_line(self):
# Only first two lines are tested for a magic comment.
src = (b'#\n'
b'#\n'
b'#coding:iso8859-15\n'
b'print(ascii("\xc3\xa4"))\n')
self.check_script_output(src, br"'\xe4'")
def test_double_coding_line(self):
# If the first line matches the second line is ignored.
src = (b'#coding:iso8859-15\n'
b'#coding:latin1\n'
b'print(ascii("\xc3\xa4"))\n')
self.check_script_output(src, br"'\xc3\u20ac'")
def test_double_coding_same_line(self):
src = (b'#coding:iso8859-15 coding:latin1\n'
b'print(ascii("\xc3\xa4"))\n')
self.check_script_output(src, br"'\xc3\u20ac'")
def test_first_non_utf8_coding_line(self):
src = (b'#coding:iso-8859-15 \xa4\n'
b'print(ascii("\xc3\xa4"))\n')
self.check_script_output(src, br"'\xc3\u20ac'")
def test_second_non_utf8_coding_line(self):
src = (b'\n'
b'#coding:iso-8859-15 \xa4\n'
b'print(ascii("\xc3\xa4"))\n')
self.check_script_output(src, br"'\xc3\u20ac'")
def test_utf8_bom(self):
src = (b'\xef\xbb\xbfprint(ascii("\xc3\xa4"))\n')
self.check_script_output(src, br"'\xe4'")
def test_utf8_bom_and_utf8_coding_line(self):
src = (b'\xef\xbb\xbf#coding:utf-8\n'
b'print(ascii("\xc3\xa4"))\n')
self.check_script_output(src, br"'\xe4'")
def test_crlf(self):
src = (b'print(ascii("""\r\n"""))\n')
out = self.check_script_output(src, br"'\n'")
def test_crcrlf(self):
src = (b'print(ascii("""\r\r\n"""))\n')
out = self.check_script_output(src, br"'\n\n'")
def test_crcrcrlf(self):
src = (b'print(ascii("""\r\r\r\n"""))\n')
out = self.check_script_output(src, br"'\n\n\n'")
def test_crcrcrlf2(self):
src = (b'#coding:iso-8859-1\n'
b'print(ascii("""\r\r\r\n"""))\n')
out = self.check_script_output(src, br"'\n\n\n'")
class UTF8ValidatorTest(unittest.TestCase):
@unittest.skipIf(not sys.platform.startswith("linux"),
"Too slow to run on non-Linux platforms")
@requires_resource('cpu')
def test_invalid_utf8(self):
# This is a port of test_utf8_decode_invalid_sequences in
# test_unicode.py to exercise the separate utf8 validator in
# Parser/tokenizer/helpers.c used when reading source files.
# That file is written using low-level C file I/O, so the only way to
# test it is to write actual files to disk.
# Each example is put inside a string at the top of the file so
# it's an otherwise valid Python source file. Put some newlines
# beforehand so we can assert that the error is reported on the
# correct line.
template = b'\n\n\n"%s"\n'
fn = TESTFN
self.addCleanup(unlink, fn)
def check(content):
with open(fn, 'wb') as fp:
fp.write(template % content)
rc, stdout, stderr = script_helper.assert_python_failure(fn)
# We want to assert that the python subprocess failed gracefully,
# not via a signal.
self.assertGreaterEqual(rc, 1)
self.assertIn(b"Non-UTF-8 code starting with", stderr)
self.assertIn(b"on line 4", stderr)
# continuation bytes in a sequence of 2, 3, or 4 bytes
continuation_bytes = [bytes([x]) for x in range(0x80, 0xC0)]
# start bytes of a 2-byte sequence equivalent to code points < 0x7F
invalid_2B_seq_start_bytes = [bytes([x]) for x in range(0xC0, 0xC2)]
# start bytes of a 4-byte sequence equivalent to code points > 0x10FFFF
invalid_4B_seq_start_bytes = [bytes([x]) for x in range(0xF5, 0xF8)]
invalid_start_bytes = (
continuation_bytes + invalid_2B_seq_start_bytes +
invalid_4B_seq_start_bytes + [bytes([x]) for x in range(0xF7, 0x100)]
)
for byte in invalid_start_bytes:
check(byte)
for sb in invalid_2B_seq_start_bytes:
for cb in continuation_bytes:
check(sb + cb)
for sb in invalid_4B_seq_start_bytes:
for cb1 in continuation_bytes[:3]:
for cb3 in continuation_bytes[:3]:
check(sb+cb1+b'\x80'+cb3)
for cb in [bytes([x]) for x in range(0x80, 0xA0)]:
check(b'\xE0'+cb+b'\x80')
check(b'\xE0'+cb+b'\xBF')
# surrogates
for cb in [bytes([x]) for x in range(0xA0, 0xC0)]:
check(b'\xED'+cb+b'\x80')
check(b'\xED'+cb+b'\xBF')
for cb in [bytes([x]) for x in range(0x80, 0x90)]:
check(b'\xF0'+cb+b'\x80\x80')
check(b'\xF0'+cb+b'\xBF\xBF')
for cb in [bytes([x]) for x in range(0x90, 0xC0)]:
check(b'\xF4'+cb+b'\x80\x80')
check(b'\xF4'+cb+b'\xBF\xBF')
class BytesSourceEncodingTest(AbstractSourceEncodingTest, unittest.TestCase):
def check_script_output(self, src, expected):
with captured_stdout() as stdout:
exec(src)
out = stdout.getvalue().encode('latin1')
self.assertEqual(out.rstrip(), expected)
class FileSourceEncodingTest(AbstractSourceEncodingTest, unittest.TestCase):
def check_script_output(self, src, expected):
with tempfile.TemporaryDirectory() as tmpd:
fn = os.path.join(tmpd, 'test.py')
with open(fn, 'wb') as fp:
fp.write(src)
res = script_helper.assert_python_ok(fn)
self.assertEqual(res.out.rstrip(), expected)
if __name__ == "__main__":
unittest.main()
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