我正在尝试为我的应用程序编写单元测试。第一次尝试时，由于未定义的符号，我的单元测试构建无法链接。ld.lld: 错误：未定义符号：AnalysisEngine::

我正在尝试为我的应用程序编写单元测试。第一次尝试时，由于未定义的符号，我的单元测试构建无法链接。

ld.lld: error: undefined symbol: AnalysisEngine::diagnosisDetected(Diagnosis)
>>> referenced by ../code/core/src/analysisengine.cpp:18
>>>               ../code/core/src/analysisengine.cpp.obj:(AnalysisEngine::parseBuffer())
>>> referenced by ../code/core/src/analysisengine.cpp:22
>>>               ../code/core/src/analysisengine.cpp.obj:(AnalysisEngine::parseBuffer())
>>> referenced by ../code/core/src/analysisengine.cpp:26
>>>               ../code/core/src/analysisengine.cpp.obj:(AnalysisEngine::parseBuffer())

ld.lld: error: undefined symbol: AnalysisEngine::staticMetaObject
>>> referenced by ../code/core/src/analysisengine.cpp.obj:(.refptr._ZN14AnalysisEngine16staticMetaObjectE)

ld.lld: error: undefined symbol: vtable for AnalysisEngine
>>> referenced by ../code/core/src/analysisengine.cpp.obj:(.refptr._ZTV14AnalysisEngine)

我的单元测试依赖于 AnalysisEngine() 类并对其进行了实例化。在我的普通应用程序中，它可以很好地链接和构建，但由于某种原因，信号出现了问题 diagnosisDetected 。链接器为什么找不到它？（所有相关代码如下）

.h

#ifndef ANALYSISENGINE_H
#define ANALYSISENGINE_H

#include <QObject>
#include <QTimer>
#include "framebuffer.h"
#include "diagnosis.h"

class AnalysisEngine : public QObject {
    Q_OBJECT

public:
    explicit AnalysisEngine(QObject *parent = nullptr);
    bool flatliningCheck();
    bool tachycardiaCheck();
    bool arrhythmiaCheck();

signals:
    void diagnosisDetected(Diagnosis diagnosis);

private:
    QTimer analysisTimer;
    FrameBuffer* buffer;
    void parseBuffer();
};

#endif // ANALYSISENGINE_H

.cpp的相关部分

#include "analysisengine.h"
#include <QDebug>
#include <cmath>

AnalysisEngine::AnalysisEngine(QObject *parent)
    : QObject(parent)
{
    connect(&analysisTimer, &QTimer::timeout, this, &AnalysisEngine::parseBuffer);
    analysisTimer.start(3000);  // Run analysis every two seconds
}

void AnalysisEngine::parseBuffer() {
    QMutexLocker locker(buffer->lock());

    if (flatliningCheck()) {
        qDebug() << "Diagnosis Detected: FLATLINE";
        emit diagnosisDetected(Diagnosis::FLATLINING);
    }
    if (tachycardiaCheck()) {
        qDebug() << "Diagnosis Detected: TACHYCARDIA";
        emit diagnosisDetected(Diagnosis::TACHYCARDIA);
    }
    if (arrhythmiaCheck()) {
        qDebug() << "Diagnosis Detected: ARRHYTHMIA";
        emit diagnosisDetected(Diagnosis::ARRHYTHMIA);
    }
}

diagnostic.h 包含信号中使用的枚举，并包含在 analysisengine.h 中

#ifndef DIAGNOSIS_H
#define DIAGNOSIS_H

enum class Diagnosis {
    FLATLINING,
    TACHYCARDIA,
    ARRHYTHMIA
};

#endif // DIAGNOSIS_H

我的单元测试（Qtest）cmakelists.txt：

cmake_minimum_required(VERSION 3.5)

project(CoreUnitTests LANGUAGES CXX)

enable_testing()

find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Gui Test)
find_package(Qt6 REQUIRED COMPONENTS Gui Test)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

add_executable(CoreUnitTests tst_TestAnalysisEngine.cpp
                             test_analysisengine.h
                             ../../code/core/src/analysisengine.cpp
                             ../../code/core/src/framebuffer.cpp
                             ../../code/core/inc/diagnosis.h)

add_test(NAME TestAnalysisEngine COMMAND TestAnalysisEngine)

target_include_directories(CoreUnitTests PRIVATE
    ../../code/core/inc  # Add the core headers to the include path
    ./
)

target_link_libraries(CoreUnitTests PRIVATE Qt6::Gui Qt6::Test)