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