// This is free and unencumbered software released into the public domain.

#[test]
fn define_function_block() {
    use protoflow_core::{BlockResult, FunctionBlock, InputPort, OutputPort};
    use protoflow_derive::FunctionBlock;

    /// A block that simply echoes inputs to outputs.
    #[derive(FunctionBlock, Clone)]
    pub struct Echo(pub InputPort<i64>, pub OutputPort<i64>);

    impl FunctionBlock<i64, i64> for Echo {
        fn compute(&self, input: i64) -> BlockResult<i64> {
            Ok(input)
        }
    }
}