1 files changed, 25 insertions, 28 deletions
diff --git a/pyfakefs/tests/fake_tempfile_test.py b/pyfakefs/tests/fake_tempfile_test.py
index 7ddd4e1..f208b56 100644
--- a/pyfakefs/tests/fake_tempfile_test.py
+++ b/pyfakefs/tests/fake_tempfile_test.py
@@ -39,79 +39,76 @@ class FakeTempfileModuleTest(fake_filesystem_unittest.TestCase):
 
     def test_named_temporary_file_no_delete(self):
         obj = tempfile.NamedTemporaryFile(delete=False)
-        obj.write(b'foo')
+        obj.write(b"foo")
         obj.close()
         file_obj = self.fs.get_object(obj.name)
         contents = file_obj.contents
-        self.assertEqual('foo', contents)
-        obj = tempfile.NamedTemporaryFile(mode='w', delete=False)
-        obj.write('foo')
+        self.assertEqual("foo", contents)
+        obj = tempfile.NamedTemporaryFile(mode="w", delete=False)
+        obj.write("foo")
         obj.close()
         file_obj = self.fs.get_object(obj.name)
-        self.assertEqual('foo', file_obj.contents)
+        self.assertEqual("foo", file_obj.contents)
 
     def test_mkstemp(self):
         next_fd = len(self.fs.open_files)
         temporary = tempfile.mkstemp()
         self.assertEqual(2, len(temporary))
         self.assertTrue(
-            temporary[1].startswith(
-                os.path.join(tempfile.gettempdir(), 'tmp')))
+            temporary[1].startswith(os.path.join(tempfile.gettempdir(), "tmp"))
+        )
         self.assertEqual(next_fd, temporary[0])
         self.assertTrue(self.fs.exists(temporary[1]))
         mode = 0o666 if self.fs.is_windows_fs else 0o600
-        self.assertEqual(self.fs.get_object(temporary[1]).st_mode,
-                         stat.S_IFREG | mode)
-        fh = os.fdopen(temporary[0], 'w+b')
+        self.assertEqual(self.fs.get_object(temporary[1]).st_mode, stat.S_IFREG | mode)
+        fh = os.fdopen(temporary[0], "w+b")
         self.assertEqual(temporary[0], fh.fileno())
 
     def test_mkstemp_dir(self):
         """test tempfile.mkstemp(dir=)."""
         # expect fail: /dir does not exist
         with self.assertRaises(OSError):
-            tempfile.mkstemp(dir='/dir')
+            tempfile.mkstemp(dir="/dir")
         # expect pass: /dir exists
-        self.fs.create_dir('/dir')
+        self.fs.create_dir("/dir")
         next_fd = len(self.fs.open_files)
-        temporary = tempfile.mkstemp(dir='/dir')
+        temporary = tempfile.mkstemp(dir="/dir")
         self.assertEqual(2, len(temporary))
         self.assertEqual(next_fd, temporary[0])
-        self.assertTrue(temporary[1].startswith(
-            os.path.join(os.sep, 'dir', 'tmp')))
+        self.assertTrue(
+            temporary[1].startswith(os.path.join(self.fs.root_dir_name, "dir", "tmp"))
+        )
         self.assertTrue(self.fs.exists(temporary[1]))
         mode = 0o666 if self.fs.is_windows_fs else 0o600
-        self.assertEqual(self.fs.get_object(temporary[1]).st_mode,
-                         stat.S_IFREG | mode)
+        self.assertEqual(self.fs.get_object(temporary[1]).st_mode, stat.S_IFREG | mode)
 
     def test_mkdtemp(self):
         dirname = tempfile.mkdtemp()
         self.assertTrue(dirname)
         self.assertTrue(self.fs.exists(dirname))
-        self.assertEqual(self.fs.get_object(dirname).st_mode,
-                         stat.S_IFDIR | 0o700)
+        self.assertEqual(self.fs.get_object(dirname).st_mode, stat.S_IFDIR | 0o700)
 
     def test_temporary_directory(self):
         with tempfile.TemporaryDirectory() as tmpdir:
             self.assertTrue(tmpdir)
             self.assertTrue(self.fs.exists(tmpdir))
-            self.assertEqual(self.fs.get_object(tmpdir).st_mode,
-                             stat.S_IFDIR | 0o700)
+            self.assertEqual(self.fs.get_object(tmpdir).st_mode, stat.S_IFDIR | 0o700)
 
     def test_temporary_file(self):
         with tempfile.TemporaryFile() as f:
-            f.write(b'test')
+            f.write(b"test")
             f.seek(0)
-            self.assertEqual(b'test', f.read())
+            self.assertEqual(b"test", f.read())
 
     def test_temporay_file_with_dir(self):
         with self.assertRaises(FileNotFoundError):
-            tempfile.TemporaryFile(dir='/parent')
-        os.mkdir('/parent')
+            tempfile.TemporaryFile(dir="/parent")
+        os.mkdir("/parent")
         with tempfile.TemporaryFile() as f:
-            f.write(b'test')
+            f.write(b"test")
             f.seek(0)
-            self.assertEqual(b'test', f.read())
+            self.assertEqual(b"test", f.read())
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     unittest.main()