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diff --git a/python/samba/tests/smb.py b/python/samba/tests/smb.py
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+++ b/python/samba/tests/smb.py
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+# -*- coding: utf-8 -*-
+# Unix SMB/CIFS implementation. Tests for smb manipulation
+# Copyright (C) David Mulder <dmulder@suse.com> 2018
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import samba
+import os
+import random
+import sys
+from samba import NTSTATUSError
+from samba.ntstatus import (NT_STATUS_OBJECT_NAME_NOT_FOUND,
+                            NT_STATUS_OBJECT_PATH_NOT_FOUND)
+from samba.samba3 import libsmb_samba_internal as libsmb
+from samba.samba3 import param as s3param
+
+PY3 = sys.version_info[0] == 3
+realm = os.environ.get('REALM')
+domain_dir = realm.lower() + '/'
+test_contents = 'abcd' * 256
+utf_contents = u'Süßigkeiten Äpfel ' * 128
+test_literal_bytes_embed_nulls = b'\xff\xfe\x14\x61\x00\x00\x62\x63\x64' * 256
+binary_contents = b'\xff\xfe'
+binary_contents = binary_contents + "Hello cruel world of python3".encode('utf8') * 128
+test_dir = os.path.join(domain_dir, 'testing_%d' % random.randint(0, 0xFFFF))
+test_file = os.path.join(test_dir, 'testing').replace('/', '\\')
+
+
+class SMBTests(samba.tests.TestCase):
+    def setUp(self):
+        super().setUp()
+        self.server = os.environ["SERVER"]
+        creds = self.insta_creds(template=self.get_credentials())
+
+        # create an SMB connection to the server
+        lp = s3param.get_context()
+        lp.load(os.getenv("SMB_CONF_PATH"))
+        self.smb_conn = libsmb.Conn(self.server, "sysvol", lp, creds)
+
+        self.smb_conn.mkdir(test_dir)
+
+    def tearDown(self):
+        super().tearDown()
+        try:
+            self.smb_conn.deltree(test_dir)
+        except:
+            pass
+
+    def test_list(self):
+        # check a basic listing returns the items we expect
+        ls = [f['name'] for f in self.smb_conn.list(domain_dir)]
+        self.assertIn('scripts', ls,
+                      msg='"scripts" directory not found in sysvol')
+        self.assertIn('Policies', ls,
+                      msg='"Policies" directory not found in sysvol')
+        self.assertNotIn('..', ls,
+                         msg='Parent (..) found in directory listing')
+        self.assertNotIn('.', ls,
+                         msg='Current dir (.) found in directory listing')
+
+        # using a '*' mask should be the same as using no mask
+        ls_wildcard = [f['name'] for f in self.smb_conn.list(domain_dir, "*")]
+        self.assertEqual(ls, ls_wildcard)
+
+        # applying a mask should only return items that match that mask
+        ls_pol = [f['name'] for f in self.smb_conn.list(domain_dir, "Pol*")]
+        expected = ["Policies"]
+        self.assertEqual(ls_pol, expected)
+
+        # each item in the listing is a has with expected keys
+        expected_keys = ['attrib', 'mtime', 'name', 'short_name', 'size']
+        for item in self.smb_conn.list(domain_dir):
+            for key in expected_keys:
+                self.assertIn(key, item,
+                              msg="Key '%s' not in listing '%s'" % (key, item))
+
+    def test_deltree(self):
+        """The smb.deltree API should delete files and sub-dirs"""
+        # create some test sub-dirs
+        dirpaths = []
+        empty_dirs = []
+        cur_dir = test_dir
+
+        for subdir in ["subdir-X", "subdir-Y", "subdir-Z"]:
+            path = self.make_sysvol_path(cur_dir, subdir)
+            self.smb_conn.mkdir(path)
+            dirpaths.append(path)
+            cur_dir = path
+
+            # create another empty dir just for kicks
+            path = self.make_sysvol_path(cur_dir, "another")
+            self.smb_conn.mkdir(path)
+            empty_dirs.append(path)
+
+        # create some files in these directories
+        filepaths = []
+        for subdir in dirpaths:
+            for i in range(1, 4):
+                contents = "I'm file {0} in dir {1}!".format(i, subdir)
+                path = self.make_sysvol_path(subdir, "file-{0}.txt".format(i))
+                self.smb_conn.savefile(path, contents.encode('utf8'))
+                filepaths.append(path)
+
+        # sanity-check these dirs/files exist
+        for subdir in dirpaths + empty_dirs:
+            self.assertTrue(self.smb_conn.chkpath(subdir),
+                            "Failed to create {0}".format(subdir))
+        for path in filepaths:
+            self.assertTrue(self.file_exists(path),
+                            "Failed to create {0}".format(path))
+
+        # try using deltree to remove a single empty directory
+        path = empty_dirs.pop(0)
+        self.smb_conn.deltree(path)
+        self.assertFalse(self.smb_conn.chkpath(path),
+                         "Failed to delete {0}".format(path))
+
+        # try using deltree to remove a single file
+        path = filepaths.pop(0)
+        self.smb_conn.deltree(path)
+        self.assertFalse(self.file_exists(path),
+                         "Failed to delete {0}".format(path))
+
+        # delete the top-level dir
+        self.smb_conn.deltree(test_dir)
+
+        # now check that all the dirs/files are no longer there
+        for subdir in dirpaths + empty_dirs:
+            self.assertFalse(self.smb_conn.chkpath(subdir),
+                             "Failed to delete {0}".format(subdir))
+        for path in filepaths:
+            self.assertFalse(self.file_exists(path),
+                             "Failed to delete {0}".format(path))
+
+    def file_exists(self, filepath):
+        """Returns whether a regular file exists (by trying to open it)"""
+        try:
+            self.smb_conn.loadfile(filepath)
+            exists = True
+        except NTSTATUSError as err:
+            if (err.args[0] == NT_STATUS_OBJECT_NAME_NOT_FOUND or
+                err.args[0] == NT_STATUS_OBJECT_PATH_NOT_FOUND):
+                exists = False
+            else:
+                raise err
+        return exists
+
+    def test_unlink(self):
+        """
+        The smb.unlink API should delete file
+        """
+        # create the test file
+        self.assertFalse(self.file_exists(test_file))
+        self.smb_conn.savefile(test_file, binary_contents)
+        self.assertTrue(self.file_exists(test_file))
+
+        # delete it and check that it's gone
+        self.smb_conn.unlink(test_file)
+        self.assertFalse(self.file_exists(test_file))
+
+    def test_chkpath(self):
+        """Tests .chkpath determines whether or not a directory exists"""
+
+        self.assertTrue(self.smb_conn.chkpath(test_dir))
+
+        # should return False for a non-existent directory
+        bad_dir = self.make_sysvol_path(test_dir, 'dont_exist')
+        self.assertFalse(self.smb_conn.chkpath(bad_dir))
+
+        # should return False for files (because they're not directories)
+        self.smb_conn.savefile(test_file, binary_contents)
+        self.assertFalse(self.smb_conn.chkpath(test_file))
+
+        # check correct result after creating and then deleting a new dir
+        new_dir = self.make_sysvol_path(test_dir, 'test-new')
+        self.smb_conn.mkdir(new_dir)
+        self.assertTrue(self.smb_conn.chkpath(new_dir))
+        self.smb_conn.rmdir(new_dir)
+        self.assertFalse(self.smb_conn.chkpath(new_dir))
+
+    def test_save_load_text(self):
+
+        self.smb_conn.savefile(test_file, test_contents.encode('utf8'))
+
+        contents = self.smb_conn.loadfile(test_file)
+        self.assertEqual(contents.decode('utf8'), test_contents,
+                          msg='contents of test file did not match what was written')
+
+        # check we can overwrite the file with new contents
+        new_contents = 'wxyz' * 128
+        self.smb_conn.savefile(test_file, new_contents.encode('utf8'))
+        contents = self.smb_conn.loadfile(test_file)
+        self.assertEqual(contents.decode('utf8'), new_contents,
+                          msg='contents of test file did not match what was written')
+
+    # with python2 this will save/load str type (with embedded nulls)
+    # with python3 this will save/load bytes type
+    def test_save_load_string_bytes(self):
+        self.smb_conn.savefile(test_file, test_literal_bytes_embed_nulls)
+
+        contents = self.smb_conn.loadfile(test_file)
+        self.assertEqual(contents, test_literal_bytes_embed_nulls,
+                          msg='contents of test file did not match what was written')
+
+    # python3 only this will save/load unicode
+    def test_save_load_utfcontents(self):
+        if PY3:
+            self.smb_conn.savefile(test_file, utf_contents.encode('utf8'))
+
+            contents = self.smb_conn.loadfile(test_file)
+            self.assertEqual(contents.decode('utf8'), utf_contents,
+                              msg='contents of test file did not match what was written')
+
+    # with python2 this will save/load str type
+    # with python3 this will save/load bytes type
+    def test_save_binary_contents(self):
+        self.smb_conn.savefile(test_file, binary_contents)
+
+        contents = self.smb_conn.loadfile(test_file)
+        self.assertEqual(contents, binary_contents,
+                          msg='contents of test file did not match what was written')
+
+    def make_sysvol_path(self, dirpath, filename):
+        # return the dir + filename as a sysvol path
+        return os.path.join(dirpath, filename).replace('/', '\\')