how to unit test a Qt application with QtTest using subdirs - qt

Question

I found a few other hits when searching for this particular problem, but i cant get my setup to work with my unit test project(s).
project info: ( optional reading)
I am in the beginning of my final undergraduate project, where I am to
create an IDE for the language Promula and the the
verification tool Spin. The professor I am doing this with expects to
use it in his classes and for future undergraduates to keep improving. It is also meant to be a open source project everyone can contribute to.
Spin tool
my folder struture:
QSpin
-QSpin.pro
-QSpinApplication
--QSpinapplication.pro
--QSpinApplication.pri
--include
---Workspace
----*.h
--src
---Workspace
----*.cpp
-QSpinApplicationTests
--QSpinApplicationTests.pro
--WorkspaceGroupTests
---WorkspaceGroupTests.pro
----some cpp testfile
My QSpinApplication compiles and runs without any problems. The import of what i have so can be imported.
#include <Workspace/(file_name).h>
However in my test project WorkspaceGroupTests i want to include headers in the same way, but i cant get it to work. Beside that i assume the test project need to know where the cpp files are. If i dont use any of the application headers the test project compiles and runs with the default test case.
at the moment i am using a default shadow build with its root folder in the QSpin folder.
Any idea of how i get my test project working correctly, to actual be able to test my application classes?
QSpin.pro:
TEMPLATE = subdirs
CONFIG += ordered
SUBDIRS += \
QSpinApplication\QSpinApplication.pro \
QSpinApplicationTests
QSpinApplication.pro:
QT += quick qml gui
CONFIG += c++11
DEFINES += QT_DEPRECATED_WARNINGS
SOURCES +=src/main.cpp
include(QSpinApplication.pri)
RESOURCES += qml.qrc
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target
QSpinApplication.pri:
#//DEPENDPATH += $$PWD
INCLUDEPATH += ./include
SOURCES +=src/workspace/workspaceview.cpp \
src/workspace/groupitem.cpp \
src/workspace/groupitemsplitter.cpp \
src/workspace/workspacegroup.cpp \
src/workspace/workspaceviewattached.cpp \
src/workspace/workspaceviewiteminfo.cpp \
src/workspace/workspacegrouplinknode.cpp
HEADERS += \
include/workspace/workspaceview.h \
include/workspace/groupitem.h \
include/workspace/groupitemsplitter.h \
include/workspace/workspacegroup.h \
include/workspace/workspaceviewattached.h \
include/workspace/workspace.h \
include/workspace/workspaceviewiteminfo.h \
include/workspace/workspacegrouplinknode.h
QSpinApplicationTests.pro:
TEMPLATE = subdirs
SUBDIRS += \
WorkspaceGroupTests
WorkspaceGroupTests.pro:
QT += testlib
QT -= gui
DEPENDPATH+=./../../QSpinApplication
include(./../../QSpinApplication/QSpinApplication.pri)
CONFIG += qt console warn_on depend_includepath testcase
CONFIG -= app_bundle
TEMPLATE = app
SOURCES += tst_workspacegrouptests.cpp

Answer 1

Not sure if I understood well but in general, what I would advise is to create a separate structure for "lib" where you put logic code that can be tested, so default structure would look like that:
Structure:
├───app.pro
├───lib.pro
└───tests.pro
Then you put in your lib.pro:
TARGET = NameOfTarget
TEMPLATE = lib
CONFIG += staticlib
and add in your tests.pro, and in app.pro:
LIBS += -L../lib -lNameOfTarget
At end it should be possible without problems to include in app directory and in test:
#include "anyHeaderFromLib.h" .

Answer 2

As an extra addition for Michal Kalinowski answer:
Looks like this will work only for Linux/Mac, in case of Windows you should handle it on that way:
win32:CONFIG(release, debug|release): LIBS += -L../lib/debug -lNameOfTarget
else:win32:CONFIG(debug, debug|release): LIBS += --L../lib/release -lNameOfTarget
else:unix: LIBS += -L../lib -lNameOfTarget
Some more context can be get here: https://doc.qt.io/qtcreator/creator-project-qmake-libraries.html