capture QR codes from camera and major refactoring

- add GUI for QR code capturing from camera (CV2 is used)
- support different QR readers: ZBAR,QREADER,QREADER_DEEP,CV2,CV2_WECHAT
- support several input files
- add option to ignore duplicate otps
- write warnings and errors to stderr
- add output coloring
- rename project from extract_otp_secret_keys to extract_otp_secrets
- improve help
- clean verbose level output
- use Python type hints and check with mypy
- use f-strings
- clean up code
- add more tests
- calculate code coverage
- use src-layout: move files and folders
- support wheel packing
- enhance README.md
- bugfixes
    * fix -k -
    * fix utf-8 encoding on windows

tests/extract_otp_secrets_img_unit_test.py

@@ -0,0 +1,89 @@
+# Unit test for extract_otp_secrets.py
+
+# Run tests:
+# python -m unittest
+
+# Author: sssudame
+
+# 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 <https://www.gnu.org/licenses/>.
+
+from __future__ import annotations  # workaround for PYTHON <= 3.10
+import unittest
+
+import extract_otp_secrets
+from utils import Capturing
+
+
+class TestQRImageExtract(unittest.TestCase):
+    def test_img_qr_reader_happy_path(self) -> None:
+        with Capturing() as actual_output:
+            extract_otp_secrets.main(['tests/data/test_googleauth_export.png'])
+
+        expected_output =\
+            ['Name:    Test1:test1@example1.com', 'Secret:  JBSWY3DPEHPK3PXP', 'Issuer:  Test1', 'Type:    totp', '',
+             'Name:    Test2:test2@example2.com', 'Secret:  JBSWY3DPEHPK3PXQ', 'Issuer:  Test2', 'Type:    totp', '',
+             'Name:    Test3:test3@example3.com', 'Secret:  JBSWY3DPEHPK3PXR', 'Issuer:  Test3', 'Type:    totp', '']
+
+        self.assertEqual(actual_output, expected_output)
+
+    def test_img_qr_reader_no_qr_code_in_image(self) -> None:
+        with Capturing() as actual_output:
+            with self.assertRaises(SystemExit) as context:
+                extract_otp_secrets.main(['-n', 'tests/data/lena_std.tif'])
+
+        expected_output = ['', 'ERROR: Unable to read QR Code from file.', 'input file: tests/data/lena_std.tif']
+
+        self.assertEqual(actual_output, expected_output)
+        self.assertEqual(context.exception.code, 1)
+
+    def test_img_qr_reader_nonexistent_file(self) -> None:
+        with Capturing() as actual_output:
+            with self.assertRaises(SystemExit) as context:
+                extract_otp_secrets.main(['-n', 'nonexistent.bmp'])
+
+        expected_output = ['', 'ERROR: Input file provided is non-existent or not a file.', 'input file: nonexistent.bmp']
+
+        self.assertEqual(actual_output, expected_output)
+        self.assertEqual(context.exception.code, 1)
+
+    def test_img_qr_reader_non_image_file(self) -> None:
+        with Capturing() as actual_output:
+            extract_otp_secrets.main(['-n', 'tests/data/text_masquerading_as_image.jpeg'])
+
+        expected_output = [
+            '',
+            'WARN: input is not a otpauth-migration:// url',
+            'source: tests/data/text_masquerading_as_image.jpeg',
+            "input: This is just a text file masquerading as an image file.",
+            'Maybe a wrong file was given',
+            '',
+            'ERROR: could not parse query parameter in input url',
+            'source: tests/data/text_masquerading_as_image.jpeg',
+            "url: This is just a text file masquerading as an image file.",
+        ]
+
+        self.assertEqual(actual_output, expected_output)
+
+    def setUp(self) -> None:
+        self.cleanup()
+
+    def tearDown(self) -> None:
+        self.cleanup()
+
+    def cleanup(self) -> None:
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()