bpo-40275: Use new test.support helper submodules in tests

Lib/distutils/tests/support.py

@@ -6,7 +6,7 @@
 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 @@ def tearDown(self):
         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.

Lib/distutils/tests/test_build_ext.py

@@ -15,6 +15,7 @@
 
 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 @@ def setUp(self):
         # 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)
 

Lib/distutils/tests/test_filelist.py

@@ -8,7 +8,6 @@
 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 @@ def test_process_template(self):
 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 @@ def test_basic_discovery(self):
         '.' 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 @@ def test_non_local_discovery(self):
         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)
 

Lib/distutils/tests/test_spawn.py

@@ -4,7 +4,7 @@
 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 @@ def test_spawn(self):
         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 @@ def test_find_executable(self):
                 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 @@ def test_find_executable(self):
             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 @@ def test_find_executable(self):
                     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 @@ def test_find_executable(self):
                     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

Lib/test/test_dbm_gnu.py

@@ -1,5 +1,6 @@
 from test import support
-gdbm = support.import_module("dbm.gnu") #skip if not supported
+from test.support import import_helper
+gdbm = import_helper.import_module("dbm.gnu") #skip if not supported
 import unittest
 import os
 from test.support import TESTFN, TESTFN_NONASCII, unlink

Lib/test/test_eof.py

@@ -2,6 +2,7 @@
 
 import sys
 from test import support
+from test.support import os_helper
 from test.support import script_helper
 import unittest
 
@@ -48,7 +49,7 @@ def test_line_continuation_EOF(self):
     @unittest.skipIf(not sys.executable, "sys.executable required")
     def test_line_continuation_EOF_from_file_bpo2180(self):
         """Ensure tok_nextc() does not add too many ending newlines."""
-        with support.temp_dir() as temp_dir:
+        with os_helper.temp_dir() as temp_dir:
             file_name = script_helper.make_script(temp_dir, 'foo', '\\')
             rc, out, err = script_helper.assert_python_failure(file_name)
             self.assertIn(b'unexpected EOF while parsing', err)

Lib/test/test_hashlib.py

@@ -18,7 +18,8 @@
 import unittest
 import warnings
 from test import support
-from test.support import _4G, bigmemtest, import_fresh_module
+from test.support import _4G, bigmemtest
+from test.support.import_helper import import_fresh_module
 from test.support import threading_helper
 from http.client import HTTPException
 

Lib/test/test_idle.py

@@ -1,5 +1,5 @@
 import unittest
-from test.support import import_module
+from test.support.import_helper import import_module
 
 # Skip test_idle if _tkinter wasn't built, if tkinter is missing,
 # if tcl/tk is not the 8.5+ needed for ttk widgets,

Lib/test/test_imaplib.py

@@ -14,6 +14,7 @@
                           run_with_tz, run_with_locale, cpython_only)
 from test.support import hashlib_helper
 from test.support import threading_helper
+from test.support import warnings_helper
 import unittest
 from unittest import mock
 from datetime import datetime, timezone, timedelta
@@ -575,7 +576,7 @@ def test_ssl_verified(self):
     # to CPython stdlib
     @cpython_only
     def test_certfile_arg_warn(self):
-        with support.check_warnings(('', DeprecationWarning)):
+        with warnings_helper.check_warnings(('', DeprecationWarning)):
             with mock.patch.object(self.imap_class, 'open'):
                 with mock.patch.object(self.imap_class, '_connect'):
                     self.imap_class('localhost', 143, certfile=CERTFILE)

Lib/test/test_marshal.py

@@ -1,4 +1,5 @@
 from test import support
+from test.support import os_helper
 import array
 import io
 import marshal
@@ -17,13 +18,13 @@ def helper(self, sample, *extra):
         new = marshal.loads(marshal.dumps(sample, *extra))
         self.assertEqual(sample, new)
         try:
-            with open(support.TESTFN, "wb") as f:
+            with open(os_helper.TESTFN, "wb") as f:
                 marshal.dump(sample, f, *extra)
-            with open(support.TESTFN, "rb") as f:
+            with open(os_helper.TESTFN, "rb") as f:
                 new = marshal.load(f)
             self.assertEqual(sample, new)
         finally:
-            support.unlink(support.TESTFN)
+            os_helper.unlink(os_helper.TESTFN)
 
 class IntTestCase(unittest.TestCase, HelperMixin):
     def test_ints(self):
@@ -281,20 +282,20 @@ def test_multiple_dumps_and_loads(self):
             ilen = len(interleaved)
             positions = []
             try:
-                with open(support.TESTFN, 'wb') as f:
+                with open(os_helper.TESTFN, 'wb') as f:
                     for d in data:
                         marshal.dump(d, f)
                         if ilen:
                             f.write(interleaved)
                         positions.append(f.tell())
-                with open(support.TESTFN, 'rb') as f:
+                with open(os_helper.TESTFN, 'rb') as f:
                     for i, d in enumerate(data):
                         self.assertEqual(d, marshal.load(f))
                         if ilen:
                             f.read(ilen)
                         self.assertEqual(positions[i], f.tell())
             finally:
-                support.unlink(support.TESTFN)
+                os_helper.unlink(os_helper.TESTFN)
 
     def test_loads_reject_unicode_strings(self):
         # Issue #14177: marshal.loads() should not accept unicode strings
@@ -516,81 +517,81 @@ class CAPI_TestCase(unittest.TestCase, HelperMixin):
 
     def test_write_long_to_file(self):
         for v in range(marshal.version + 1):
-            _testcapi.pymarshal_write_long_to_file(0x12345678, support.TESTFN, v)
-            with open(support.TESTFN, 'rb') as f:
+            _testcapi.pymarshal_write_long_to_file(0x12345678, os_helper.TESTFN, v)
+            with open(os_helper.TESTFN, 'rb') as f:
                 data = f.read()
-            support.unlink(support.TESTFN)
+            os_helper.unlink(os_helper.TESTFN)
             self.assertEqual(data, b'\x78\x56\x34\x12')
 
     def test_write_object_to_file(self):
         obj = ('\u20ac', b'abc', 123, 45.6, 7+8j, 'long line '*1000)
         for v in range(marshal.version + 1):
-            _testcapi.pymarshal_write_object_to_file(obj, support.TESTFN, v)
-            with open(support.TESTFN, 'rb') as f:
+            _testcapi.pymarshal_write_object_to_file(obj, os_helper.TESTFN, v)
+            with open(os_helper.TESTFN, 'rb') as f:
                 data = f.read()
-            support.unlink(support.TESTFN)
+            os_helper.unlink(os_helper.TESTFN)
             self.assertEqual(marshal.loads(data), obj)
 
     def test_read_short_from_file(self):
-        with open(support.TESTFN, 'wb') as f:
+        with open(os_helper.TESTFN, 'wb') as f:
             f.write(b'\x34\x12xxxx')
-        r, p = _testcapi.pymarshal_read_short_from_file(support.TESTFN)
-        support.unlink(support.TESTFN)
+        r, p = _testcapi.pymarshal_read_short_from_file(os_helper.TESTFN)
+        os_helper.unlink(os_helper.TESTFN)
         self.assertEqual(r, 0x1234)
         self.assertEqual(p, 2)
 
-        with open(support.TESTFN, 'wb') as f:
+        with open(os_helper.TESTFN, 'wb') as f:
             f.write(b'\x12')
         with self.assertRaises(EOFError):
-            _testcapi.pymarshal_read_short_from_file(support.TESTFN)
-        support.unlink(support.TESTFN)
+            _testcapi.pymarshal_read_short_from_file(os_helper.TESTFN)
+        os_helper.unlink(os_helper.TESTFN)
 
     def test_read_long_from_file(self):
-        with open(support.TESTFN, 'wb') as f:
+        with open(os_helper.TESTFN, 'wb') as f:
             f.write(b'\x78\x56\x34\x12xxxx')
-        r, p = _testcapi.pymarshal_read_long_from_file(support.TESTFN)
-        support.unlink(support.TESTFN)
+        r, p = _testcapi.pymarshal_read_long_from_file(os_helper.TESTFN)
+        os_helper.unlink(os_helper.TESTFN)
         self.assertEqual(r, 0x12345678)
         self.assertEqual(p, 4)
 
-        with open(support.TESTFN, 'wb') as f:
+        with open(os_helper.TESTFN, 'wb') as f:
             f.write(b'\x56\x34\x12')
         with self.assertRaises(EOFError):
-            _testcapi.pymarshal_read_long_from_file(support.TESTFN)
-        support.unlink(support.TESTFN)
+            _testcapi.pymarshal_read_long_from_file(os_helper.TESTFN)
+        os_helper.unlink(os_helper.TESTFN)
 
     def test_read_last_object_from_file(self):
         obj = ('\u20ac', b'abc', 123, 45.6, 7+8j)
         for v in range(marshal.version + 1):
             data = marshal.dumps(obj, v)
-            with open(support.TESTFN, 'wb') as f:
+            with open(os_helper.TESTFN, 'wb') as f:
                 f.write(data + b'xxxx')
-            r, p = _testcapi.pymarshal_read_last_object_from_file(support.TESTFN)
-            support.unlink(support.TESTFN)
+            r, p = _testcapi.pymarshal_read_last_object_from_file(os_helper.TESTFN)
+            os_helper.unlink(os_helper.TESTFN)
             self.assertEqual(r, obj)
 
-            with open(support.TESTFN, 'wb') as f:
+            with open(os_helper.TESTFN, 'wb') as f:
                 f.write(data[:1])
             with self.assertRaises(EOFError):
-                _testcapi.pymarshal_read_last_object_from_file(support.TESTFN)
-            support.unlink(support.TESTFN)
+                _testcapi.pymarshal_read_last_object_from_file(os_helper.TESTFN)
+            os_helper.unlink(os_helper.TESTFN)
 
     def test_read_object_from_file(self):
         obj = ('\u20ac', b'abc', 123, 45.6, 7+8j)
         for v in range(marshal.version + 1):
             data = marshal.dumps(obj, v)
-            with open(support.TESTFN, 'wb') as f:
+            with open(os_helper.TESTFN, 'wb') as f:
                 f.write(data + b'xxxx')
-            r, p = _testcapi.pymarshal_read_object_from_file(support.TESTFN)
-            support.unlink(support.TESTFN)
+            r, p = _testcapi.pymarshal_read_object_from_file(os_helper.TESTFN)
+            os_helper.unlink(os_helper.TESTFN)
             self.assertEqual(r, obj)
             self.assertEqual(p, len(data))
 
-            with open(support.TESTFN, 'wb') as f:
+            with open(os_helper.TESTFN, 'wb') as f:
                 f.write(data[:1])
             with self.assertRaises(EOFError):
-                _testcapi.pymarshal_read_object_from_file(support.TESTFN)
-            support.unlink(support.TESTFN)
+                _testcapi.pymarshal_read_object_from_file(os_helper.TESTFN)
+            os_helper.unlink(os_helper.TESTFN)
 
 
 if __name__ == "__main__":

Lib/test/test_py_compile.py

@@ -102,7 +102,7 @@ def test_cache_path(self):
         self.assertTrue(os.path.exists(self.cache_path))
 
     def test_cwd(self):
-        with support.change_cwd(self.directory):
+        with os_helper.change_cwd(self.directory):
             py_compile.compile(os.path.basename(self.source_path),
                                os.path.basename(self.pyc_path))
         self.assertTrue(os.path.exists(self.pyc_path))

Lib/test/test_set.py

@@ -1,5 +1,6 @@
 import unittest
 from test import support
+from test.support import warnings_helper
 import gc
 import weakref
 import operator
@@ -953,7 +954,7 @@ def test_repr(self):
 
 class TestBasicOpsMixedStringBytes(TestBasicOps, unittest.TestCase):
     def setUp(self):
-        self._warning_filters = support.check_warnings()
+        self._warning_filters = warnings_helper.check_warnings()
         self._warning_filters.__enter__()
         warnings.simplefilter('ignore', BytesWarning)
         self.case   = "string and bytes set"