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Editorial Team
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Asked: 2026-05-12T16:07:51+00:00

I am just starting up a new project that needs some cross-platform GUI, and

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I am just starting up a new project that needs some cross-platform GUI, and we have chosen Qt as the GUI-framework.

We need a unit-testing framework, too. Until about a year ago we used an in-house developed unit-testing framework for C++-projects, but we are now transitioning to using Google Test for new projects.

Does anyone have any experience with using Google Test for Qt-applications? Is QtTest/QTestLib a better alternative?

I am still not sure how much we want to use Qt in the non-GUI parts of the project – we would probably prefer to just use STL/Boost in the core-code with a small interface to the Qt-based GUI.

EDIT: It looks like many are leaning towards QtTest. Is there anybody who has any experience with integrating this with a continous integration server? Also, it would seem to me that having to handle a separate application for each new test case would cause a lot of friction. Is there any good way to solve that? Does Qt Creator have a good way of handling such test cases or would you need to have a project per test case?

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1 Answer

  1. Editorial Team

    I don’t know that QTestLib is “better” than one framework for another in such general terms. There is one thing that it does well, and that’s provide a good way to test Qt based applications.

    You could integrate QTest into your new Google Test based setup. I haven’t tried it, but based on how QTestLib is architected, it seems like it would not be too complicated.

    Tests written with pure QTestLib have an -xml option that you could use, along with some XSLT transformations to convert to the needed format for a continuous integration server. However, a lot of that depends on which CI server you go with. I would imagine the same applies to GTest.

    A single test app per test case never caused a lot of friction for me, but that depends on having a build system that would do a decent job of managing the building and execution of the test cases.

    I don’t know of anything in Qt Creator that would require a seperate project per test case but it could have changed since the last time I looked at Qt Creator.

    I would also suggest sticking with QtCore and staying away from the STL. Using QtCore throughout will make dealing with the GUI bits that require the Qt data types easier. You won’t have to worry about converting from one data type to another in that case.

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