bpo-40275: Use new test.support helper submodules in tests (GH-21317)

tests/support.py

@@ -6,7 +6,7 @@ import tempfile
 import unittest
 import sysconfig
 from copy import deepcopy
-import test.support
+from test.support import os_helper
 
 from distutils import log
 from distutils.log import DEBUG, INFO, WARN, ERROR, FATAL
@@ -64,7 +64,7 @@ class TempdirManager(object):
         super().tearDown()
         while self.tempdirs:
             tmpdir = self.tempdirs.pop()
-            test.support.rmtree(tmpdir)
+            os_helper.rmtree(tmpdir)
 
     def mkdtemp(self):
         """Create a temporary directory that will be cleaned up.

tests/test_build_ext.py

@@ -15,6 +15,7 @@ from distutils.errors import (
 
 import unittest
 from test import support
+from test.support import os_helper
 from test.support.script_helper import assert_python_ok
 
 # http://bugs.python.org/issue4373
@@ -38,7 +39,7 @@ class BuildExtTestCase(TempdirManager,
         # bpo-30132: On Windows, a .pdb file may be created in the current
         # working directory. Create a temporary working directory to cleanup
         # everything at the end of the test.
-        change_cwd = support.change_cwd(self.tmp_dir)
+        change_cwd = os_helper.change_cwd(self.tmp_dir)
         change_cwd.__enter__()
         self.addCleanup(change_cwd.__exit__, None, None, None)
 

tests/test_filelist.py

@@ -8,7 +8,6 @@ from distutils.errors import DistutilsTemplateError
 from distutils.filelist import glob_to_re, translate_pattern, FileList
 from distutils import filelist
 
-import test.support
 from test.support import os_helper
 from test.support import captured_stdout, run_unittest
 from distutils.tests import support
@@ -298,7 +297,7 @@ class FileListTestCase(support.LoggingSilencer,
 class FindAllTestCase(unittest.TestCase):
     @os_helper.skip_unless_symlink
     def test_missing_symlink(self):
-        with test.support.temp_cwd():
+        with os_helper.temp_cwd():
             os.symlink('foo', 'bar')
             self.assertEqual(filelist.findall(), [])
 
@@ -308,13 +307,13 @@ class FindAllTestCase(unittest.TestCase):
         '.' as the parameter, the dot should be omitted from
         the results.
         """
-        with test.support.temp_cwd():
+        with os_helper.temp_cwd():
             os.mkdir('foo')
             file1 = os.path.join('foo', 'file1.txt')
-            test.support.create_empty_file(file1)
+            os_helper.create_empty_file(file1)
             os.mkdir('bar')
             file2 = os.path.join('bar', 'file2.txt')
-            test.support.create_empty_file(file2)
+            os_helper.create_empty_file(file2)
             expected = [file2, file1]
             self.assertEqual(sorted(filelist.findall()), expected)
 
@@ -323,9 +322,9 @@ class FindAllTestCase(unittest.TestCase):
         When findall is called with another path, the full
         path name should be returned.
         """
-        with test.support.temp_dir() as temp_dir:
+        with os_helper.temp_dir() as temp_dir:
             file1 = os.path.join(temp_dir, 'file1.txt')
-            test.support.create_empty_file(file1)
+            os_helper.create_empty_file(file1)
             expected = [file1]
             self.assertEqual(filelist.findall(temp_dir), expected)
 

tests/test_spawn.py

@@ -4,7 +4,7 @@ import stat
 import sys
 import unittest.mock
 from test.support import run_unittest, unix_shell
-from test import support as test_support
+from test.support import os_helper
 
 from distutils.spawn import find_executable
 from distutils.spawn import spawn
@@ -44,9 +44,9 @@ class SpawnTestCase(support.TempdirManager,
         spawn([exe])  # should work without any error
 
     def test_find_executable(self):
-        with test_support.temp_dir() as tmp_dir:
+        with os_helper.temp_dir() as tmp_dir:
             # use TESTFN to get a pseudo-unique filename
-            program_noeext = test_support.TESTFN
+            program_noeext = os_helper.TESTFN
             # Give the temporary program an ".exe" suffix for all.
             # It's needed on Windows and not harmful on other platforms.
             program = program_noeext + ".exe"
@@ -66,7 +66,7 @@ class SpawnTestCase(support.TempdirManager,
                 self.assertEqual(rv, filename)
 
             # test find in the current directory
-            with test_support.change_cwd(tmp_dir):
+            with os_helper.change_cwd(tmp_dir):
                 rv = find_executable(program)
                 self.assertEqual(rv, program)
 
@@ -76,7 +76,7 @@ class SpawnTestCase(support.TempdirManager,
             self.assertIsNone(rv)
 
             # PATH='': no match, except in the current directory
-            with test_support.EnvironmentVarGuard() as env:
+            with os_helper.EnvironmentVarGuard() as env:
                 env['PATH'] = ''
                 with unittest.mock.patch('distutils.spawn.os.confstr',
                                          return_value=tmp_dir, create=True), \
@@ -86,12 +86,12 @@ class SpawnTestCase(support.TempdirManager,
                     self.assertIsNone(rv)
 
                     # look in current directory
-                    with test_support.change_cwd(tmp_dir):
+                    with os_helper.change_cwd(tmp_dir):
                         rv = find_executable(program)
                         self.assertEqual(rv, program)
 
             # PATH=':': explicitly looks in the current directory
-            with test_support.EnvironmentVarGuard() as env:
+            with os_helper.EnvironmentVarGuard() as env:
                 env['PATH'] = os.pathsep
                 with unittest.mock.patch('distutils.spawn.os.confstr',
                                          return_value='', create=True), \
@@ -100,12 +100,12 @@ class SpawnTestCase(support.TempdirManager,
                     self.assertIsNone(rv)
 
                     # look in current directory
-                    with test_support.change_cwd(tmp_dir):
+                    with os_helper.change_cwd(tmp_dir):
                         rv = find_executable(program)
                         self.assertEqual(rv, program)
 
             # missing PATH: test os.confstr("CS_PATH") and os.defpath
-            with test_support.EnvironmentVarGuard() as env:
+            with os_helper.EnvironmentVarGuard() as env:
                 env.pop('PATH', None)
 
                 # without confstr