src/tools/rustfmt/tests/cargo-fmt/main.rs

   1 // Integration tests for cargo-fmt.
   2
   3 use std::env;
   4 use std::process::Command;
   5
   6 /// Run the cargo-fmt executable and return its output.
   7 fn cargo_fmt(args: &[&str]) -> (String, String) {
   8     let mut bin_dir = env::current_exe().unwrap();
   9     bin_dir.pop(); // chop off test exe name
  10     if bin_dir.ends_with("deps") {
  11         bin_dir.pop();
  12     }
  13     let cmd = bin_dir.join(format!("cargo-fmt{}", env::consts::EXE_SUFFIX));
  14
  15     // Ensure cargo-fmt runs the rustfmt binary from the local target dir.
  16     let path = env::var_os("PATH").unwrap_or_default();
  17     let mut paths = env::split_paths(&path).collect::<Vec<_>>();
  18     paths.insert(0, bin_dir);
  19     let new_path = env::join_paths(paths).unwrap();
  20
  21     match Command::new(&cmd).args(args).env("PATH", new_path).output() {
  22         Ok(output) => (
  23             String::from_utf8(output.stdout).expect("utf-8"),
  24             String::from_utf8(output.stderr).expect("utf-8"),
  25         ),
  26         Err(e) => panic!("failed to run `{:?} {:?}`: {}", cmd, args, e),
  27     }
  28 }
  29
  30 macro_rules! assert_that {
  31     ($args:expr, $check:ident $check_args:tt) => {
  32         let (stdout, stderr) = cargo_fmt($args);
  33         if !stdout.$check$check_args {
  34             panic!(
  35                 "Output not expected for cargo-fmt {:?}\n\
  36                  expected: {}{}\n\
  37                  actual stdout:\n{}\n\
  38                  actual stderr:\n{}",
  39                 $args,
  40                 stringify!($check),
  41                 stringify!($check_args),
  42                 stdout,
  43                 stderr
  44             );
  45         }
  46     };
  47 }
  48
  49 #[ignore]
  50 #[test]
  51 fn version() {
  52     assert_that!(&["--version"], starts_with("rustfmt "));
  53     assert_that!(&["--version"], starts_with("rustfmt "));
  54     assert_that!(&["--", "-V"], starts_with("rustfmt "));
  55     assert_that!(&["--", "--version"], starts_with("rustfmt "));
  56 }
  57
  58 #[ignore]
  59 #[test]
  60 fn print_config() {
  61     assert_that!(
  62         &["--", "--print-config", "current", "."],
  63         contains("max_width = ")
  64     );
  65 }
  66
  67 #[ignore]
  68 #[test]
  69 fn rustfmt_help() {
  70     assert_that!(&["--", "--help"], contains("Format Rust code"));
  71     assert_that!(&["--", "-h"], contains("Format Rust code"));
  72     assert_that!(&["--", "--help=config"], contains("Configuration Options:"));
  73 }