Create more unit tests for USB Devices and Printer Driver (#21)

Reviewed-on: #21

tests/mocks/MockPrinterDriver.hpp

@@ -0,0 +1,50 @@
+/*
+    ptrnt - print labels on linux
+    Copyright (C) 2025  Moritz Martinius
+
+    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/>.
+
+ */
+
+#pragma once
+
+#include <gmock/gmock.h>
+
+#include "printers/interface/IPrinterDriver.hpp"
+
+namespace ptprnt {
+
+/**
+ * @brief GMock implementation of IPrinterDriver for unit testing
+ *
+ * This mock allows tests to verify printer interactions without
+ * requiring actual printer hardware.
+ */
+class MockPrinterDriver : public IPrinterDriver {
+   public:
+    MOCK_METHOD(std::string_view, getDriverName, (), (override));
+    MOCK_METHOD(std::string_view, getName, (), (override));
+    MOCK_METHOD(std::string_view, getVersion, (), (override));
+    MOCK_METHOD(libusbwrap::usbId, getUsbId, (), (override));
+    MOCK_METHOD(PrinterInfo, getPrinterInfo, (), (override));
+    MOCK_METHOD(PrinterStatus, getPrinterStatus, (), (override));
+    MOCK_METHOD(bool, attachUsbDevice, (std::shared_ptr<libusbwrap::IUsbDevice> usbHndl), (override));
+    MOCK_METHOD(bool, detachUsbDevice, (), (override));
+    MOCK_METHOD(bool, printBitmap, (const graphics::Bitmap<graphics::ALPHA8>& bitmap), (override));
+    MOCK_METHOD(bool, printMonochromeData, (const graphics::MonochromeData& data), (override));
+    MOCK_METHOD(bool, printLabel, (const std::unique_ptr<graphics::ILabel> label), (override));
+    MOCK_METHOD(bool, print, (), (override));
+};
+
+}  // namespace ptprnt