test_CanBusManager.cpp

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#include "CanBusManager.hpp"
#include "MockMCP2515Controller.hpp"
#include <QSignalSpy>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
 
using ::testing::_;
using ::testing::Return;

class CanBusManagerTest : public ::testing::Test {
protected:
    void SetUp() override {
        mockMcpController = new MockMCP2515Controller();
        manager = new CanBusManager(mockMcpController);
    }

    void TearDown() override {
        if (manager != nullptr) {
            delete manager;
        }
        if (mockMcpController != nullptr) {
            delete mockMcpController;
        }
    }

    IMCP2515Controller *mockMcpController;
    CanBusManager *manager;
};

TEST_F(CanBusManagerTest, SpeedSignalEmitsCorrectly) {
    QSignalSpy speedSpy(manager, &CanBusManager::speedUpdated);
 
    float expectedSpeed = 150.0F;
    emit mockMcpController->speedUpdated(expectedSpeed);
 
    ASSERT_EQ(speedSpy.count(), 1);
    ASSERT_EQ(speedSpy.takeFirst().at(0).toFloat(), expectedSpeed);
}

TEST_F(CanBusManagerTest, RpmSignalEmitsCorrectly) {
    QSignalSpy rpmSpy(manager, &CanBusManager::rpmUpdated);
 
    int expectedRpm = 2500;
    emit mockMcpController->rpmUpdated(expectedRpm);
 
    ASSERT_EQ(rpmSpy.count(), 1);
    ASSERT_EQ(rpmSpy.takeFirst().at(0).toInt(), expectedRpm);
}

TEST_F(CanBusManagerTest, InitializeFailsWhenControllerFails) {
    EXPECT_CALL(*static_cast<MockMCP2515Controller *>(mockMcpController), init())
            .WillOnce(Return(false));
 
    ASSERT_FALSE(manager->initialize());
}

TEST_F(CanBusManagerTest, InitializeSucceedsWhenControllerSucceeds) {
    EXPECT_CALL(*static_cast<MockMCP2515Controller *>(mockMcpController), init())
            .WillOnce(Return(true));
 
    ASSERT_TRUE(manager->initialize());
}

TEST_F(CanBusManagerTest, DestructorCallsStopReading) {
    EXPECT_CALL(*static_cast<MockMCP2515Controller *>(mockMcpController), init())
            .WillOnce(Return(true));
    EXPECT_CALL(*static_cast<MockMCP2515Controller *>(mockMcpController),
                            stopReading())
            .Times(1);
 
    ASSERT_TRUE(manager->initialize());
 
    delete manager;
    manager = nullptr;
 
    SUCCEED();
}