Function run

tests/all/cli_tests.rs:1417–1435

(args: &[&str])

    #[test]
    fn p2_cli_stdio_write_flushes() -> Result<()> {
        fn run(args: &[&str]) -> Result<()> {
            println!("running {args:?}");
            let mut child = get_wasmtime_command()?
                .args(args)
                .stdin(Stdio::piped())
                .stdout(Stdio::piped())
                .spawn()?;
            let mut stdout = child.stdout.take().unwrap();
            let mut buf = [0; 10];
            match stdout.read(&mut buf) {
                Ok(2) => assert_eq!(&buf[..2], b"> "),
                e => panic!("unexpected read result {e:?}"),
            }
            drop(stdout);
            drop(child.stdin.take().unwrap());
            let status = child.wait()?;
            assert!(status.success());
            Ok(())
        }

        run(&["run", "-Spreview2=n", P2_CLI_STDIO_WRITE_FLUSHES])?;
        run(&["run", "-Spreview2=y", P2_CLI_STDIO_WRITE_FLUSHES])?;