How to structure project while unit-testing Qt app by QTestLib

Question

I got my Qt project and I\'m using Qt Creator. I want to unit-test all my code.
However I\'m quite new at QTestLib framework but everyone recommended it for testing Qt-b

Answer 1

I use Qt Creator by CMake instead of qmake to build my Qt project.

Basically I have to folders:

src
tests

Each test is a program in itself testing a class. The app to be tested is compiled as a library.. You compile all your sources in the folder src as a library.

// ClassTest.cpp
#include "ClassTest.h"
#include "Class2Test.h" // Class of the app

#include 

ClassTest::ClassTest( QObject* parent )
    : QObject(parent)
{ 
}

QTEST_MAIN( ClassTest )
#include "ClassTest.moc"

You just have to link your lib to your test executable.

Example:

in the src folder CMakeLists.txt example

add_library( MyAPP
    SHARED
    Class2Test.cpp
)
target_link_libraries( MyAPP
    ${QT_LIBRARIES}
)

in the tests folder CMakeLists.txt example, for each test.

qt4_automoc( ${test_src} )
add_executable( ${test_name} ${test_src} )
target_link_libraries( ${test_name}
    MyAPP
    ${QT_LIBRARIES}
    ${QT_QTTEST_LIBRARY}
)

It is still in the same project but you can add a flag to let the user compile the test or not. It is clean because the app stays untouched and it allows you to test each class of your app.