Function hasPaintedStubFrame

pj_widgets/tests/raster_stream_view_test.cpp:14–23

namespace {

bool hasPaintedStubFrame(PJ::RasterStreamView& view) {
  QImage rendered(view.size(), QImage::Format_RGB32);
  rendered.fill(Qt::black);

  QPainter painter(&rendered);
  view.render(&painter);

  const QColor center = rendered.pixelColor(rendered.rect().center());
  return center.red() > 0 || center.green() > 0 || center.blue() > 0;
}

// Launch the stub helper through the view; it publishes one frame. Verify the
// view connects, paints the copied frame, and does not prematurely end the session.