macro_rules! assert_wasi_output { ($file:expr, $name:expr, $po_dir_args: expr, $mapdir_args:expr, $envvar_args:expr, $expected:expr) => {{ use wasmer_dev_utils::stdio::StdioCapturer; use wasmer_runtime::Func; use wasmer_wasi::generate_import_object; let wasm_bytes = include_bytes!($file); let module = wasmer_runtime::compile(&wasm_bytes[..]) .expect("WASM can't be compiled"); let import_object = generate_import_object(vec![], vec![], $po_dir_args, $mapdir_args); let instance = module .instantiate(&import_object) .map_err(|err| format!("Can't instantiate the WebAssembly module: {:?}", err)) .unwrap(); // NOTE: Need to figure what the unwrap is for ?? let capturer = StdioCapturer::new(); let start: Func<(), ()> = instance .func("_start") .map_err(|e| format!("{:?}", e)) .expect("start function in wasi module"); start.call().expect("execute the wasm"); let output = capturer.end().unwrap().0; let expected_output = include_str!($expected); assert!( output.contains(expected_output), "Output: `{}` does not contain expected output: `{}`", output, expected_output ); }}; }