allow to choose qr reader for images

tests/conftest.py

@@ -1,11 +1,22 @@
-import pytest
 from typing import Any
 
+import pytest
+
+from extract_otp_secrets import QRMode
+
 
 def pytest_addoption(parser: pytest.Parser) -> None:
     parser.addoption("--relaxed", action='store_true', help="run tests in relaxed mode")
+    parser.addoption("--fast", action="store_true", help="faster execution, do not run all combinations")
 
 
 @pytest.fixture
 def relaxed(request: pytest.FixtureRequest) -> Any:
     return request.config.getoption("--relaxed")
+
+
+def pytest_generate_tests(metafunc: pytest.Metafunc) -> None:
+    if "qr_mode" in metafunc.fixturenames:
+        number = 2 if metafunc.config.getoption("fast") else len(QRMode)
+        qr_modes = [mode.name for mode in QRMode]
+        metafunc.parametrize("qr_mode", qr_modes[0:number])