You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: platform_test.rs
    path of file: ./repos/crux/crux_platform/tests
    
    the code of the file until where you have to start completion: mod shared {
    use crux_core::macros::Effect;
    use crux_core::render::Render;
    use crux_platform::{Platform, PlatformResponse};
    use serde::{Deserialize, Serialize};

    #[derive(Default)]
    pub struct App;

    #[derive(Serialize, Deserialize)]
    pub enum Event {
        PlatformGet,
        PlatformSet(PlatformResponse),
    }

    #[derive(Default, Serialize, Deserialize)]
    pub struct Model {
        pub platform: String,
    }

    #[derive(Serialize, Deserialize, Default)]
    pub struct ViewModel {
        pub platform: String,
    }

    
    pub fn run(core: &Core<Effect, App>) {
        let mut queue: VecDeque<CoreMessage> = VecDeque::new();

        queue.push_back(CoreMessage::Event(Event::PlatformGet));

        while !queue.is_empty() {
            let msg = queue.pop_front();

            let effs = match msg {
                Some(CoreMessage::Event(m)) => core.process_event(m),
                Some(CoreMessage::Response(Outcome::Platform(mut request, outcome))) => {
                    core.resolve(&mut request, outcome)
                }

                _ => vec![],
            };

            for effect in effs {
                if let Effect::Platform(request) = effect {
                    queue.push_back(CoreMessage::Response(Outcome::Platform(
                        request,
                        PlatformResponse("test shell".to_string()),
                    )));
                }
            }
        }
    }