test: add sealed test to preserve developer environement

Author: oknozor

Cargo.lock

@@ -40,4 +40,8 @@ path = "src/bin/bombadil.rs"
 required-features = ["clap"]
 
 [dev-dependencies]
-temp_testdir = "0.2"
+sealed_test = "1.0.0"
+speculoos = "0.8.0"
+cmd_lib = "1.3.0"
+pretty_assertions = "1.2.1"
+indoc = "1.0.4"

Cargo.toml

@@ -2,6 +2,7 @@ use anyhow::Result;
 use clap::lazy_static::lazy_static;
 use clap::{AppSettings, IntoApp, Parser};
 use clap_complete::Shell;
+use std::io;
 use std::io::BufRead;
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
@@ -209,7 +210,9 @@ async fn main() -> Result<()> {
                 .enable_profiles(profiles.iter().map(String::as_str).collect())
                 .unwrap_or_else(|err| fatal!("{}", err));
 
-            bombadil.print_metadata(metadata_type);
+            bombadil
+                .print_metadata(metadata_type, &mut io::stdout())
+                .expect("Failed to write metadata to stdout");
         }
         Cli::GenerateCompletions { shell } => {
             clap_complete::generate(