Question

我第一次尝试将单元测试添加到我的项目中。

我可以运行模拟测试（不使用我的项目的类）并运行应用程序。但是如果我从项目中实例化对象，我会得到一个未解析的QMetaObject外部符号。如果我没记错的话，这意味着对象的moc没有包含在项目中。

我该如何解决这个问题？我使用googletests也有同样的问题。该指南也没有帮助。我已经尝试安装qt单元测试插件，结果相同。

我上传的模拟项目遵循我在上述项目中使用的相同结构，在此处获取：https://github.com/quimnuss/QtUnitTestingTest

我在Windows上使用静态构建的qt，但我猜这是不相关的。使用QtCreator作为IDE和NMAke构建。

我也尝试过添加HelloWorld.lib，但是看看Makefile.release它没有被使用。

有人知道我做错了什么？

这是单元测试.pro：

QT       += widgets network testlib

TARGET = tst_someunittesttest
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app

INCLUDEPATH += $$PWD/../HelloWorld

include($$PWD/../HelloWorld/helloworldCommon.pri)

LIBS += -L"$$OUT_PWD/../HelloWorld/release"
LIBS += -lHelloWorld

message("Searching libs here $$LIBS")

SOURCES += tst_someunittesttest.cpp
DEFINES += SRCDIR=\\\"$$PWD/\\\"

第一个错误的完整消息：

tst_someunittesttest.obj : error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __cdecl HelloWorld::metaObject(void)const " (?metaObject@HelloWorld@@UEBAPEBUQMetaObject@@XZ)

Answer 1

使用以下标志时：

LIBS += -L"$$OUT_PWD/../HelloWorld/release"
LIBS += -lHelloWorld

您必须拥有已编译的动态或静态库。因此，您必须创建一个生成库的项目。在下一部分中，我将向您展示如何创建动态库。

<强> HelloWorldLib.pro

#-------------------------------------------------
#
# Project created by QtCreator 2017-01-06T12:37:49
#
#-------------------------------------------------

QT       -= gui

TARGET = HelloWorldLib
TEMPLATE = lib

DEFINES += HELLOWORLDLIB_LIBRARY

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

INCLUDEPATH += $$PWD/include

SOURCES += src/helloworldlib.cpp

HEADERS += include/helloworldlib.h\
        include/helloworldlib_global.h

unix {
    target.path = /usr/lib
    INSTALLS += target
}

DESTDIR = $$PWD/lib

包含/ helloworldlib.h

#ifndef HELLOWORLDLIB_H #define HELLOWORLDLIB_H #include "helloworldlib_global.h" #include <QDebug> class HELLOWORLDLIBSHARED_EXPORT HelloWorldLib: public QObject { Q_OBJECT public: HelloWorldLib(){ } static bool returnTrue() { return true; } public slots: void someSlot() { qDebug() << "test"; } }; #endif // HELLOWORLDLIB_H

包含/ helloworldlib_global.h

#ifndef HELLOWORLDLIB_GLOBAL_H #define HELLOWORLDLIB_GLOBAL_H #include <QtCore/qglobal.h> #if defined(HELLOWORLDLIB_LIBRARY) # define HELLOWORLDLIBSHARED_EXPORT Q_DECL_EXPORT #else # define HELLOWORLDLIBSHARED_EXPORT Q_DECL_IMPORT #endif #endif // HELLOWORLDLIB_GLOBAL_H

<强>的src / helloworldlib.cpp

#include "helloworldlib.h"

这里我展示了测试项目。

<强> HelloWorldTest.pro

#------------------------------------------------- # # Project created by QtCreator 2017-01-06T12:42:42 # #------------------------------------------------- QT += testlib QT -= gui # greaterThan(QT_MAJOR_VERSION, 4): QT += widgets TARGET = tst_helloworldtesttest CONFIG += console CONFIG -= app_bundle TEMPLATE = app # The following define makes your compiler emit warnings if you use # any feature of Qt which as been marked as deprecated (the exact warnings # depend on your compiler). Please consult the documentation of the # deprecated API in order to know how to port your code away from it. DEFINES += QT_DEPRECATED_WARNINGS # You can also make your code fail to compile if you use deprecated APIs. # In order to do so, uncomment the following line. # You can also select to disable deprecated APIs only up to a certain version of Qt. #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 SOURCES += tst_helloworldtesttest.cpp DEFINES += SRCDIR=\\\"$$PWD/\\\" win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../HelloWorldLib/lib/release/ -lHelloWorldLib else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../HelloWorldLib/lib/debug/ -lHelloWorldLib else:unix: LIBS += -L$$PWD/../HelloWorldLib/lib/ -lHelloWorldLib INCLUDEPATH += $$PWD/../HelloWorldLib/include DEPENDPATH += $$PWD/../HelloWorldLib/include

<强> tst_helloworldtesttest.cpp

#include <QString> #include <QtTest> #include <helloworldlib.h> #include <QDebug> class HelloWorldTestTest : public QObject { Q_OBJECT public: HelloWorldTestTest(); private Q_SLOTS: void testCase1_data(); void testCase1(); }; HelloWorldTestTest::HelloWorldTestTest() { } void HelloWorldTestTest::testCase1_data() { QTest::addColumn<QString>("data"); QTest::newRow("0") << QString(); } void HelloWorldTestTest::testCase1() { QFETCH(QString, data); QVERIFY2(true, "Failure"); HelloWorldLib hw; QVERIFY(hw.returnTrue()); } QTEST_APPLESS_MAIN(HelloWorldTestTest) #include "tst_helloworldtesttest.moc"

输出：

********* Start testing of HelloWorldTestTest ********* Config: Using QtTest library 5.7.1, Qt 5.7.1 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 6.2.1 20160830) PASS : HelloWorldTestTest::initTestCase() PASS : HelloWorldTestTest::testCase1(0) PASS : HelloWorldTestTest::cleanupTestCase() Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 0ms ********* Finished testing of HelloWorldTestTest *********

以下链接是完整的项目：https://github.com/eyllanesc/stackoverflow/tree/master/QtUnitTestingTest

QT单元测试moc“未解析的外部符号”用于QMetaObject

1 个答案: