main.rs

fn generate_single_test(dest_path: &mut File, cache_dir: &Path, name: &String, version: &String) {
    
    let dl_crate = format!("{}-{}.crate",name, version);
    let mut new_path = cache_dir.join(dl_crate);
    let new_path = new_path.to_str();

    let expected = [
        "#[test]\n",
        "fn test_",name,"(){\n",
        "let outdir = TempDir::new(\"testrunner\").unwrap();\n",
        "let new_path = File::create(\"",new_path,"\");\n",
        "let mut tar = Archive::new(GzDecoder::new(new_path));\n",
        "let archive = &mut tar;\n",
        "archive.unpack(outdir);\n",
        "let mut path_to_test = outdir.path().join(\"",name,"-",version,"\");\n",
        "let cmd = Command::new(\"cargo\").arg(\"test\").current_dir(path_to_test).output().unwrap();\n",
        "match cmd.status.success() {\n",
        "  True => {},\n",
        "  False => panic!(\"Test didn't pass!\")\n",
        "}\n",
        "drop(outdir);",
        "outdir.close();",
        "}\n",
      ].concat();

      dest_path.write(expected.as_bytes());
}