QSignalSpy: wait for specific signal

i have some use cases in the qtmultimedia unit tests, where i want to wait for a specific signal to be emitted. something like:

class MyClass 
{
signals:
    void mySignal(int);
};

MyClass instance;
QSignalSpy spy(instance, &MyClass::mySignal);

spy.waitFor(42);

it would be great to have support for this kind of use cases in one way or another. though it may also be interesting to investigate the use of more complex matchers (like e.g. supported by gmock https://github.com/google/googletest/blob/main/docs/gmock_cook_book.md#using-simple-matchers)