Function assert_output

tests/disas.rs:293–344

Assert that `wat` contains the test expectations necessary for `funcs`.

(test: &Test, output: CompileOutput)

/// Assert that `wat` contains the test expectations necessary for `funcs`.
fn assert_output(test: &Test, output: CompileOutput) -> Result<()> {
    let mut actual = String::new();
    match output {
        CompileOutput::Clif(funcs) => {
            for mut func in funcs {
                func.dfg.resolve_all_aliases();
                writeln!(&mut actual, "{}", func.display()).unwrap();
            }
        }
        CompileOutput::Elf(bytes) => {
            let mut cmd = wasmtime_test_util::command(env!("CARGO_BIN_EXE_wasmtime"));
            cmd.arg("objdump")
                .arg("--address-width=4")
                .arg("--address-jumps")
                .stdin(Stdio::piped())
                .stdout(Stdio::piped())
                .stderr(Stdio::piped());
            match &test.config.objdump {
                Some(args) => {
                    cmd.args(args.to_vec());
                }
                None => {
                    cmd.arg("--traps=false");
                }
            }
            if let Some(filter) = &test.config.filter {
                cmd.arg("--filter").arg(filter);
            }

            let mut child = cmd.spawn().context("failed to run wasmtime")?;
            child
                .stdin
                .take()
                .unwrap()
                .write_all(&bytes)
                .context("failed to write stdin")?;
            let output = child
                .wait_with_output()
                .context("failed to wait for child")?;
            if !output.status.success() {
                bail!(
                    "objdump failed: {}\nstderr: {}",
                    output.status,
                    String::from_utf8_lossy(&output.stderr),
                );
            }
            actual = String::from_utf8(output.stdout).unwrap();
        }
    }
    let actual = actual.trim();
    assert_or_bless_output(&test.path, &test.contents, actual)
}

fn assert_or_bless_output(path: &Path, wat: &str, actual: &str) -> Result<()> {
    log::debug!("=== actual ===\n{actual}");