test: Re-enable tests on windows.

[iphydf]

Some of these aren't working still.

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This change is 

[nurupo]

What do you mean "can't find Qt plugin DLLs"? Just put the needed plugin dlls in appropriate directories alongside the .exe file. Plugin dlls typically have their own directories, e.g. platforms, imageformats, iconengines, etc. - you can see a qtox windows release zip having those.

Also, you might need to enable building of the specific plugin in the Windows Qt cross-compilation config if the Qt plugin dll is not being built in the first place.

[iphydf]

What do you mean "can't find Qt plugin DLLs"? Just put the needed plugin dlls in appropriate directories alongside the .exe file. Plugin dlls typically have their own directories, e.g. platforms, imageformats, iconengines, etc. - you can see a qtox windows release zip having those.

Also, you might need to enable building of the specific plugin in the Windows Qt cross-compilation config if the Qt plugin dll is not being built in the first place.

What I mean is that the tests running on CI don't find the plugins because they don't know that we magically put them into /export. Our setup and zip do know that because we coded that into the setup/zip script.

[nurupo]

My understanding is that Qt looks for plugins in hardcoded directories alongside the .exe file. So just put the needed plugin dlls in appropriate directories alongside the tests .exe files and the problem is solved, the tests would be able to find the plugins.

Apparently setting QT_PLUGIN_PATH should work too, didn't know of that env variable, that looks like a better way of doing that too rather than copying/symlinking the plugin dirs.