"""Tests for distutils.cygwinccompiler."""
import unittest
import sys
import os
from io import BytesIO
from test.support import run_unittest

from distutils import cygwinccompiler
from distutils.cygwinccompiler import (check_config_h,
                                       CONFIG_H_OK, CONFIG_H_NOTOK,
                                       CONFIG_H_UNCERTAIN,
                                       get_msvcr)
from distutils.tests import support

class FakePopen(object):
    test_class = None

    def __init__(self, cmd, shell, stdout):
        self.cmd = cmd.split()[0]
        exes = self.test_class._exes
        if self.cmd in exes:
            # issue #6438 in Python 3.x, Popen returns bytes
            self.stdout = BytesIO(exes[self.cmd])
        else:
            self.stdout = os.popen(cmd, 'r')


class CygwinCCompilerTestCase(support.TempdirManager,
                              unittest.TestCase):

    def setUp(self):
        super(CygwinCCompilerTestCase, self).setUp()
        self.version = sys.version
        self.python_h = os.path.join(self.mkdtemp(), 'python.h')
        from distutils import sysconfig
        self.old_get_config_h_filename = sysconfig.get_config_h_filename
        sysconfig.get_config_h_filename = self._get_config_h_filename
        self.old_find_executable = cygwinccompiler.find_executable
        cygwinccompiler.find_executable = self._find_executable
        self._exes = {}
        self.old_popen = cygwinccompiler.Popen
        FakePopen.test_class = self
        cygwinccompiler.Popen = FakePopen

    def tearDown(self):
        sys.version = self.version
        from distutils import sysconfig
        sysconfig.get_config_h_filename = self.old_get_config_h_filename
        cygwinccompiler.find_executable = self.old_find_executable
        cygwinccompiler.Popen = self.old_popen
        super(CygwinCCompilerTestCase, self).tearDown()

    def _get_config_h_filename(self):
        return self.python_h

    def _find_executable(self, name):
        if name in self._exes:
            return name
        return None

    def test_check_config_h(self):

        # check_config_h looks for "GCC" in sys.version first
        # returns CONFIG_H_OK if found
        sys.version = ('2.6.1 (r261:67515, Dec  6 2008, 16:42:21) \n[GCC '
                       '4.0.1 (Apple Computer, Inc. build 5370)]')

        self.assertEqual(check_config_h()[0], CONFIG_H_OK)

        # then it tries to see if it can find "__GNUC__" in pyconfig.h
        sys.version = 'something without the *CC word'

        # if the file doesn't exist it returns  CONFIG_H_UNCERTAIN
        self.assertEqual(check_config_h()[0], CONFIG_H_UNCERTAIN)

        # if it exists but does not contain __GNUC__, it returns CONFIG_H_NOTOK
        self.write_file(self.python_h, 'xxx')
        self.assertEqual(check_config_h()[0], CONFIG_H_NOTOK)

        # and CONFIG_H_OK if __GNUC__ is found
        self.write_file(self.python_h, 'xxx __GNUC__ xxx')
        self.assertEqual(check_config_h()[0], CONFIG_H_OK)

    def test_get_msvcr(self):

        # none
        sys.version  = ('2.6.1 (r261:67515, Dec  6 2008, 16:42:21) '
                        '\n[GCC 4.0.1 (Apple Computer, Inc. build 5370)]')
        self.assertEqual(get_msvcr(), None)

        # MSVC 7.0
        sys.version = ('2.5.1 (r251:54863, Apr 18 2007, 08:51:08) '
                       '[MSC v.1300 32 bits (Intel)]')
        self.assertEqual(get_msvcr(), ['msvcr70'])

        # MSVC 7.1
        sys.version = ('2.5.1 (r251:54863, Apr 18 2007, 08:51:08) '
                       '[MSC v.1310 32 bits (Intel)]')
        self.assertEqual(get_msvcr(), ['msvcr71'])

        # VS2005 / MSVC 8.0
        sys.version = ('2.5.1 (r251:54863, Apr 18 2007, 08:51:08) '
                       '[MSC v.1400 32 bits (Intel)]')
        self.assertEqual(get_msvcr(), ['msvcr80'])

        # VS2008 / MSVC 9.0
        sys.version = ('2.5.1 (r251:54863, Apr 18 2007, 08:51:08) '
                       '[MSC v.1500 32 bits (Intel)]')
        self.assertEqual(get_msvcr(), ['msvcr90'])
        
        sys.version = '3.10.0 (tags/v3.10.0:b494f59, Oct  4 2021, 18:46:30) [MSC v.1929 32 bit (Intel)]'
        self.assertEqual(get_msvcr(), ['ucrt', 'vcruntime140'])

        # unknown
        sys.version = ('2.5.1 (r251:54863, Apr 18 2007, 08:51:08) '
                       '[MSC v.2000 32 bits (Intel)]')
        self.assertRaises(ValueError, get_msvcr)

def test_suite():
    return unittest.makeSuite(CygwinCCompilerTestCase)

if __name__ == '__main__':
    run_unittest(test_suite())

@@ -77,31 +77,8 @@
  os%0A
-from io import BytesIO%0A
 from
@@ -116,46 +116,8 @@
 st%0A%0A
-from distutils import cygwinccompiler%0A
 from
@@ -385,371 +385,8 @@
 rt%0A%0A
-class FakePopen(object):%0A    test_class = None%0A%0A    def __init__(self, cmd, shell, stdout):%0A        self.cmd = cmd.split()%5B0%5D%0A        exes = self.test_class._exes%0A        if self.cmd in exes:%0A            # issue #6438 in Python 3.x, Popen returns bytes%0A            self.stdout = BytesIO(exes%5Bself.cmd%5D)%0A        else:%0A            self.stdout = os.popen(cmd, 'r')%0A%0A
 %0Acla
@@ -847,288 +847,8 @@
 name
-%0A        self.old_find_executable = cygwinccompiler.find_executable%0A        cygwinccompiler.find_executable = self._find_executable%0A        self._exes = %7B%7D%0A        self.old_popen = cygwinccompiler.Popen%0A        FakePopen.test_class = self%0A        cygwinccompiler.Popen = FakePopen
 %0A%0A  
@@ -1021,122 +1021,8 @@
 ame%0A
-        cygwinccompiler.find_executable = self.old_find_executable%0A        cygwinccompiler.Popen = self.old_popen%0A
     
@@ -1146,122 +1146,8 @@
 _h%0A%0A
-    def _find_executable(self, name):%0A        if name in self._exes:%0A            return name%0A        return None%0A%0A
     

Remove unused imports in cygwincompiler and the reliance on them in tests.