def METHOD_NAME(self, app):
    self.common_map_req.params.bbox = -90, 0, 0, 90
    self.common_map_req.params["bgcolor"] = "0xff0005"
    resp = app.get(self.common_map_req)
    assert resp.content_type == "image/png"
    data = BytesIO(resp.body)
    assert is_png(data)
    img = Image.open(data)
    assert img.mode == "RGB"
    assert img.getcolors() == [(200 * 200, (255, 0, 5))]