cubic 0.18.0

Cubic is a lightweight command line manager for virtual machines. It has a simple, daemon-less and rootless design. All Cubic virtual machines run isolated in the user context. Cubic is built on top of QEMU, KVM and cloud-init. https://cubic-vm.org https://github.com/cubic-vm/cubic Show all supported images: $ cubic images Create a new virtual machine instance: $ cubic create mymachine --image ubuntu:noble List all virtual machine instances: $ cubic instances Start an instance: $ cubic start <instance name> Stop an instance: $ cubic stop <instance name> Open a shell in the instance: $ cubic ssh <machine name> Copy a file from the host to the instance: $ cubic scp <path/to/host/file> <machine>:<path/to/guest/file> Copy a file from the instance to the hots: $ cubic scp <machine>:<path/to/guest/file> <path/to/host/file> 
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use tokio;

pub struct AsyncCaller {
    runtime: tokio::runtime::Runtime,
}

impl AsyncCaller {
    pub fn new() -> Self {
        Self {
            runtime: tokio::runtime::Builder::new_multi_thread()
                .enable_all()
                .build()
                .unwrap(),
        }
    }

    pub fn call<F: Future>(&self, future: F) -> F::Output {
        self.runtime.block_on(future)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    async fn sum(a: u32, b: u32) -> u32 {
        a + b
    }

    #[test]
    fn test_single_async_call() {
        assert_eq!(5, AsyncCaller::new().call(sum(2, 3)));
    }

    #[test]
    fn test_two_async_calls() {
        let caller = AsyncCaller::new();
        assert_eq!(5, caller.call(sum(2, 3)));
        assert_eq!(3, caller.call(sum(1, 2)));
    }

    #[test]
    fn test_multiple_runtime_async_calls() {
        let caller1 = AsyncCaller::new();
        let caller2 = AsyncCaller::new();
        assert_eq!(5, caller1.call(sum(2, 3)));
        assert_eq!(3, caller2.call(sum(1, 2)));
    }
}