mirror of https://github.com/python/cpython
124 lines
3.8 KiB
Python
124 lines
3.8 KiB
Python
from importlib import _bootstrap
|
|
from . import util as source_util
|
|
|
|
import codecs
|
|
import re
|
|
import sys
|
|
# Because sys.path gets essentially blanked, need to have unicodedata already
|
|
# imported for the parser to use.
|
|
import unicodedata
|
|
import unittest
|
|
|
|
|
|
CODING_RE = re.compile(r'coding[:=]\s*([-\w.]+)')
|
|
|
|
|
|
class EncodingTest(unittest.TestCase):
|
|
|
|
"""PEP 3120 makes UTF-8 the default encoding for source code
|
|
[default encoding].
|
|
|
|
PEP 263 specifies how that can change on a per-file basis. Either the first
|
|
or second line can contain the encoding line [encoding first line]
|
|
encoding second line]. If the file has the BOM marker it is considered UTF-8
|
|
implicitly [BOM]. If any encoding is specified it must be UTF-8, else it is
|
|
an error [BOM and utf-8][BOM conflict].
|
|
|
|
"""
|
|
|
|
variable = '\u00fc'
|
|
character = '\u00c9'
|
|
source_line = "{0} = '{1}'\n".format(variable, character)
|
|
module_name = '_temp'
|
|
|
|
def run_test(self, source):
|
|
with source_util.create_modules(self.module_name) as mapping:
|
|
with open(mapping[self.module_name], 'wb') as file:
|
|
file.write(source)
|
|
loader = _bootstrap._SourceFileLoader(self.module_name,
|
|
mapping[self.module_name])
|
|
return loader.load_module(self.module_name)
|
|
|
|
def create_source(self, encoding):
|
|
encoding_line = "# coding={0}".format(encoding)
|
|
assert CODING_RE.search(encoding_line)
|
|
source_lines = [encoding_line.encode('utf-8')]
|
|
source_lines.append(self.source_line.encode(encoding))
|
|
return b'\n'.join(source_lines)
|
|
|
|
def test_non_obvious_encoding(self):
|
|
# Make sure that an encoding that has never been a standard one for
|
|
# Python works.
|
|
encoding_line = "# coding=koi8-r"
|
|
assert CODING_RE.search(encoding_line)
|
|
source = "{0}\na=42\n".format(encoding_line).encode("koi8-r")
|
|
self.run_test(source)
|
|
|
|
# [default encoding]
|
|
def test_default_encoding(self):
|
|
self.run_test(self.source_line.encode('utf-8'))
|
|
|
|
# [encoding first line]
|
|
def test_encoding_on_first_line(self):
|
|
encoding = 'Latin-1'
|
|
source = self.create_source(encoding)
|
|
self.run_test(source)
|
|
|
|
# [encoding second line]
|
|
def test_encoding_on_second_line(self):
|
|
source = b"#/usr/bin/python\n" + self.create_source('Latin-1')
|
|
self.run_test(source)
|
|
|
|
# [BOM]
|
|
def test_bom(self):
|
|
self.run_test(codecs.BOM_UTF8 + self.source_line.encode('utf-8'))
|
|
|
|
# [BOM and utf-8]
|
|
def test_bom_and_utf_8(self):
|
|
source = codecs.BOM_UTF8 + self.create_source('utf-8')
|
|
self.run_test(source)
|
|
|
|
# [BOM conflict]
|
|
def test_bom_conflict(self):
|
|
source = codecs.BOM_UTF8 + self.create_source('latin-1')
|
|
with self.assertRaises(SyntaxError):
|
|
self.run_test(source)
|
|
|
|
|
|
class LineEndingTest(unittest.TestCase):
|
|
|
|
r"""Source written with the three types of line endings (\n, \r\n, \r)
|
|
need to be readable [cr][crlf][lf]."""
|
|
|
|
def run_test(self, line_ending):
|
|
module_name = '_temp'
|
|
source_lines = [b"a = 42", b"b = -13", b'']
|
|
source = line_ending.join(source_lines)
|
|
with source_util.create_modules(module_name) as mapping:
|
|
with open(mapping[module_name], 'wb') as file:
|
|
file.write(source)
|
|
loader = _bootstrap._SourceFileLoader(module_name,
|
|
mapping[module_name])
|
|
return loader.load_module(module_name)
|
|
|
|
# [cr]
|
|
def test_cr(self):
|
|
self.run_test(b'\r')
|
|
|
|
# [crlf]
|
|
def test_crlf(self):
|
|
self.run_test(b'\r\n')
|
|
|
|
# [lf]
|
|
def test_lf(self):
|
|
self.run_test(b'\n')
|
|
|
|
|
|
def test_main():
|
|
from test.support import run_unittest
|
|
run_unittest(EncodingTest, LineEndingTest)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|