diff --git a/README.md b/README.md
index 593f1ee..fa1a06b 100644
--- a/README.md
+++ b/README.md
@@ -142,6 +142,10 @@ If you get any other errors, or have any other problem with libray, please [crea
 
 clp = compressed length prefix
 
+## Tests
+
+`python -m unittest discover`
+
 ## Deployment
 
 0. `pip3 install wheel twine`
diff --git a/docs/flow.png b/docs/flow.png
new file mode 100644
index 0000000..bbc4995
Binary files /dev/null and b/docs/flow.png differ
diff --git a/libray/__init__.py b/libray/__init__.py
index e69de29..99e3143 100644
--- a/libray/__init__.py
+++ b/libray/__init__.py
@@ -0,0 +1,32 @@
+# -*- coding: utf8 -*-
+
+# libray - Libre Blu-Ray PS3 ISO Tool
+# Copyright © 2018 - 2021 Nichlas Severinsen
+#
+# This file is part of libray.
+#
+# libray 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.
+#
+# libray 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 libray.  If not, see <https://www.gnu.org/licenses/>.
+
+# This is a script to find the redump names and game serial id's using rpcs3's compatibility list.
+# It puts the name, serial id, and some other info into an sqlite3 database.
+# That database can then be used to harcode serial id to keys into keys.db.
+# This script is not included in the release of libray.
+
+import pkgutil
+
+__all__ = []
+for loader, module_name, is_pkg in pkgutil.walk_packages(__path__):
+    __all__.append(module_name)
+    _module = loader.find_module(module_name).load_module(module_name)
+    globals()[module_name] = _module
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_interface.py b/tests/test_interface.py
new file mode 100644
index 0000000..f66fe50
--- /dev/null
+++ b/tests/test_interface.py
@@ -0,0 +1,68 @@
+# -*- coding: utf8 -*-
+
+# libray - Libre Blu-Ray PS3 ISO Tool
+# Copyright © 2018 - 2021 Nichlas Severinsen
+#
+# This file is part of libray.
+#
+# libray 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.
+#
+# libray 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 libray.  If not, see <https://www.gnu.org/licenses/>.
+
+# This is a script to find the redump names and game serial id's using rpcs3's compatibility list.
+# It puts the name, serial id, and some other info into an sqlite3 database.
+# That database can then be used to harcode serial id to keys into keys.db.
+# This script is not included in the release of libray.
+
+
+import io
+import argparse
+import builtins
+import unittest
+import unittest.mock
+
+import libray
+
+
+class TestInterface(unittest.TestCase):
+
+
+
+    @unittest.mock.patch('argparse.ArgumentParser.parse_args', return_value=argparse.Namespace())
+    def test_decrypt_with_key(self, mock_args):
+
+        io_object = io.BytesIO(b"some initial binary data: \x00\x01")
+
+        os_stat = unittest.mock.Mock()
+        os_stat.return_value.st_mode = 33188
+
+        iso_filepath = unittest.mock.Mock()
+        iso_filepath.open = unittest.mock.mock_open(read_data=b"some initial binary data: \x00\x01")
+
+        iso_filepath.is_file.return_value = True
+        iso_filepath.stat.return_value = unittest.mock.MagicMock()
+        iso_filepath.stat.st_size = 1024
+        iso_filepath.stat.st_mode = 33188
+        iso_filepath.stat.S_ISBLK.return_value = False
+
+        mock_args.iso = 'encrypted_mock.iso'
+
+        #mock_args.iso = iso_filepath
+
+        with unittest.mock.patch('os.stat', os_stat):
+
+            with unittest.mock.patch('builtins.open', iso_filepath.open):
+
+                libray.core.decrypt(mock_args)
+
+
+