Qt Unit test in a project

sierdzio

@DavidM29 said in Qt Unit test in a project:

Thank for the answers !

@jsulm
Why should I include the cpp file instead of the header which are the file we usualy use to reuse function from another class ? Is that because it is a different project ?

C++ compiler needs to compile your class to use it in a test. And in order to compile, it needs the cpp file.

@sierdzio
Ok, what do you think about my idea of keeping only one tests project with multiple cpp file corresponding to each class I want to test ?

Sounds good.

DavidM29

Thank you to all of you it seems that I'm all set. My first try seems to works nicely.

sierdzio

Nice! Happy coding :-)

HemantSuryawanshi

I want to do the same thing but for CMAKE project. Anyone have idea? @sierdzio

sierdzio

@HemantSuryawanshi said in Qt Unit test in a project:

I want to do the same thing but for CMAKE project. Anyone have idea? @sierdzio

include(CTest)
add_subdirectory(tests)
enable_testing()

:-) You can see some example code here: https://github.com/milosolutions/mwizardtemplate/blob/master/CMakeLists.txt

HemantSuryawanshi

I did all the things that you guys suggested and create a subdirectory project using CMake build system. Project is created successfully and then I create a class name Calculator in my src project. Now I am trying to access the methods from Calculator class into tests project to perform unit testing. But the compiler not able to find that methods in Calculator class.
I also added following line for linking purpose, but still its not working

target_include_directories(UnitTest PRIVATE ${CMAKE_SOURCE_DIR}/src)

The compiler giving me following errors,

tests/CMakeFiles/UnitTest.dir/tst_unittest.cpp.obj: In function `UnitTest::test_add()':
C:/Hemant/Unit_Testing/Testing_subdir/tests/tst_unittest.cpp:31: undefined reference to `Calculator::Calculator(QObject*)'
C:/Hemant/Unit_Testing/Testing_subdir/tests/tst_unittest.cpp:32: undefined reference to `Calculator::add(int, int)'
tests/CMakeFiles/UnitTest.dir/tst_unittest.cpp.obj:tst_unittest.cpp:(.rdata$.refptr._ZTV10Calculator[.refptr._ZTV10Calculator]+0x0): undefined reference to `vtable for Calculator'

Did I need to add something extra for the linking of these two subdirectories in my CMakeLists.txt files . Please help @sierdzio @jsulm

jsulm

@HemantSuryawanshi said in Qt Unit test in a project:

Did I need to add something extra for the linking of these two subdirectories in my CMakeLists.txt files

You need to add source files (*.cpp) you want to test.
As you can see from the errors you are missing the source file containing Calculator definition.

HemantSuryawanshi

@jsulm are you trying to say that I also need to add the calculator class into tests project? I already have the Calculator class implemented into src project.

jsulm

@HemantSuryawanshi said in Qt Unit test in a project:

are you trying to say that I also need to add the calculator class into tests project?

No, you need to add a reference to that file to your test project, something like:

add_executable(${PROJECT_NAME}
    PATH_TO/calculator.cpp
    tst_unittest.cpp
    ...
)

If the code you want to test compiles to a lib you could instead add a dependency to this lib.

HemantSuryawanshi

@jsulm Its working now. Thanks for response

HemantSuryawanshi

Hi, I also want to include Qt Quick Test in same project. I added required directives into project. but I have one problem that I already have the main definition and it will not take another main definition. Please tell me how cam I add

QUICK_TEST_MAIN(example)

this code into main function? @jsulm

jsulm

@HemantSuryawanshi said in Qt Unit test in a project:

I have one problem that I already have the main definition

Are you trying to test a cpp file containing main()?
Why?
There should not be anything to test. If there is something you want to test, then move that functionality in functions/methods outside of that source file.

HemantSuryawanshi

@jsulm No I want to test qml file which is present in my src project. And I want to integrate both cpp testing and qml testing into in single project which is tests. thats why I want to integrate that macro in main function. How can I do that, any idea?

jsulm

@HemantSuryawanshi said in Qt Unit test in a project:

How can I do that, any idea?

Make sure you have only one main() in your test project.

HemantSuryawanshi

@jsulm

#include <QtTest>
#include <QDebug>
#include <tst_unittest.cpp>
#include <tst_userdata.cpp>

#include <QtQuickTest/quicktest.h>
QUICK_TEST_MAIN(example)

int main(int argc, char** argv)
{
   int failedTests = 0;
   failedTests += QTest::qExec(new UnitTest, argc, argv);
   failedTests += QTest::qExec(new TestUserData, argc, argv);

   if(failedTests > 0){
       qDebug() << "total number of failed tests: " << failedTests;
   }else{
       qDebug() << "all tests passed :)";
   }
   return failedTests;
}

This is my main file. My project contains multiple unit tests including Qt test and Qt Quick test. In this I am getting error that redefinition of main function due to the QUICK_TEST_MAIN Macro.

jsulm

@HemantSuryawanshi said in Qt Unit test in a project:

I am getting error that redefinition of main function due to the QUICK_TEST_MAIN Macro

Of course, you have two main() functions now.
I suggest you split your C++ and Qt Quick tests.

HemantSuryawanshi

@jsulm how can I link the qml file to the Qt Quick test project. I tried with same way as I link cpp file earlier, but its not working.