Trying to set a QDeclarativeScriptString in a unit test (QTestLib)

Question

I'm trying to create a benchmark for part of my 2D game framework (It's a QML extension) and I'm having problems to set a declarative script property of a QOBject.

The property declaration:

Q_PROPERTY(QDeclarativeScriptString script READ script WRITE setScript NOTIFY scriptChanged)

And one of my attempts to change the script is something like this:

ScriptBehavior *behavior = new ScriptBehavior(entity);
QDeclarativeProperty(behavior, "script").write("console.log(1);");

But it doesn't work (Run the benchmark, but don't write anything to te console).

I've tried to use setProperty and manually create a QDeclarativeScriptString and set the property, but nothing works.

When I try to create the QDeclarativeScriptString, It fails:

The code:

ScriptBehavior *behavior = new ScriptBehavior(entity);
QDeclarativeScriptString scriptString;
scriptString.setScript("console.log(1)");
behavior->setScript(scriptString);

The output:

QFATAL : UpdateBenchmark::behavior() Received signal 11
FAIL!  : UpdateBenchmark::behavior() Received a fatal error.
   Loc: [Unknown file(0)]

Any help?

Thanks