Add a unit test project to an existing Qt Creator project

Question

I have an existing Qt Creator project which is not a Subdirs project. I have now reached a point where I want to add a unit test project to it. When I create the new unit test project, the "Add as a subproject to..." combo is disabled.

How can I do it? I'm thinking about creating a brand new Subdirs project and adding my existing project to it, and then adding the unit test project as well.

Is that how it should be done or is there a better way?

Yeah, you need to add an upper level project, which includes your current project as subdir project. This is probably done most easily from command line, I don't think Qt Creator has a helper for this (unless it's been added in a very recent version). You can use Qt Creator to create a subdir project for you, and then maybe add dummy app and test projects under it. Once you see how that works, then do it for your real project by hand. — hyde

DrumM DrumM · Accepted Answer · 2017-01-04T14:28:49

It's not a problem to change the project type to a subdir project (even for a gui app). That's the only way to add a unit test sub project to it. Steps:

As mentioned, make your project a subdir project:

TEMPLATE = subdirs

SUBDIRS = gui logic
Select File > New file or project ... > Other Project > Qt Unit Test
At the last page "summary" of the wizard, select your project for "Add as a subproject to project"
Your .pro file will be updated as follows:

SUBDIRS = gui logic tests

Note: If you're manually restructuring the project hierarchy, make sure the name of the sub directory matches the name of .pro file within that sub directory.

For example:

sub directory name = test --> pro file name = test.pro
sub directory name = src --> pro file name = src.pro

Add a unit test project to an existing Qt Creator project

2 Answers