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use std::env;
use std::error;
use std::fmt;
use std::fs::{self, File};
use std::io::{self, Write};
use std::path::{Path, PathBuf};
use std::process;
use std::str::FromStr;
use std::sync::atomic::{ATOMIC_USIZE_INIT, AtomicUsize, Ordering};
use std::thread;
use std::time::Duration;
static TEST_DIR: &'static str = "ripgrep-tests";
static NEXT_ID: AtomicUsize = ATOMIC_USIZE_INIT;
/// WorkDir represents a directory in which tests are run.
///
/// Directories are created from a global atomic counter to avoid duplicates.
#[derive(Debug)]
pub struct WorkDir {
/// The directory in which this test executable is running.
root: PathBuf,
/// The directory in which the test should run. If a test needs to create
/// files, they should go in here.
dir: PathBuf,
}
impl WorkDir {
/// Create a new test working directory with the given name. The name
/// does not need to be distinct for each invocation, but should correspond
/// to a logical grouping of tests.
pub fn new(name: &str) -> WorkDir {
let id = NEXT_ID.fetch_add(1, Ordering::SeqCst);
let root = env::current_exe().unwrap()
.parent().expect("executable's directory").to_path_buf();
let dir = root.join(TEST_DIR).join(name).join(&format!("{}", id));
nice_err(&dir, repeat(|| fs::create_dir_all(&dir)));
WorkDir {
root: root,
dir: dir,
}
}
/// Create a new file with the given name and contents in this directory.
pub fn create<P: AsRef<Path>>(&self, name: P, contents: &str) {
let path = self.dir.join(name);
let mut file = nice_err(&path, File::create(&path));
nice_err(&path, file.write_all(contents.as_bytes()));
nice_err(&path, file.flush());
}
/// Remove a file with the given name from this directory.
pub fn remove<P: AsRef<Path>>(&self, name: P) {
let path = self.dir.join(name);
nice_err(&path, fs::remove_file(&path));
}
/// Create a new directory with the given path (and any directories above
/// it) inside this directory.
pub fn create_dir<P: AsRef<Path>>(&self, path: P) {
let path = self.dir.join(path);
nice_err(&path, repeat(|| fs::create_dir_all(&path)));
}
/// Creates a new command that is set to use the ripgrep executable in
/// this working directory.
pub fn command(&self) -> process::Command {
let mut cmd = process::Command::new(&self.bin());
cmd.current_dir(&self.dir);
cmd
}
/// Returns the path to the ripgrep executable.
pub fn bin(&self) -> PathBuf {
self.root.join("rg")
}
/// Returns the path to this directory.
pub fn path(&self) -> &Path {
&self.dir
}
/// Creates a directory symlink to the src with the given target name
/// in this directory.
#[cfg(not(windows))]
pub fn link<S: AsRef<Path>, T: AsRef<Path>>(&self, src: S, target: T) {
use std::os::unix::fs::symlink;
let src = self.dir.join(src);
let target = self.dir.join(target);
let _ = fs::remove_file(&target);
nice_err(&target, symlink(&src, &target));
}
#[cfg(windows)]
pub fn link<S: AsRef<Path>, T: AsRef<Path>>(&self, src: S, target: T) {
use std::os::windows::fs::symlink_dir;
let src = self.dir.join(src);
let target = self.dir.join(target);
let _ = fs::remove_dir(&target);
nice_err(&target, symlink_dir(&src, &target));
}
/// Runs and captures the stdout of the given command.
///
/// If the return type could not be created from a string, then this
/// panics.
pub fn stdout<E: fmt::Debug, T: FromStr<Err=E>>(
&self,
cmd: &mut process::Command,
) -> T {
let o = self.output(cmd);
let stdout = String::from_utf8_lossy(&o.stdout);
match stdout.parse() {
Ok(t) => t,
Err(err) => {
panic!("could not convert from string: {:?}\n\n{}", err, stdout);
}
}
}
/// Gets the output of a command. If the command failed, then this panics.
pub fn output(&self, cmd: &mut process::Command) -> process::Output {
let o = cmd.output().unwrap();
if !o.status.success() {
let suggest =
if o.stderr.is_empty() {
"\n\nDid your search end up with no results?".to_string()
} else {
"".to_string()
};
panic!("\n\n==========\n\
command failed but expected success!\
{}\
\n\ncommand: {:?}\
\ncwd: {}\
\n\nstatus: {}\
\n\nstdout: {}\
\n\nstderr: {}\
\n\n==========\n",
suggest, cmd, self.dir.display(), o.status,
String::from_utf8_lossy(&o.stdout),
String::from_utf8_lossy(&o.stderr));
}
o
}
/// Runs the given command and asserts that it resulted in an error exit
/// code.
pub fn assert_err(&self, cmd: &mut process::Command) {
let o = cmd.output().unwrap();
if o.status.success() {
panic!("\n\n===== {:?} =====\n\
command succeeded but expected failure!\
\n\ncwd: {}\
\n\nstatus: {}\
\n\nstdout: {}\n\nstderr: {}\
\n\n=====\n",
cmd, self.dir.display(), o.status,
String::from_utf8_lossy(&o.stdout),
String::from_utf8_lossy(&o.stderr));
}
}
}
fn nice_err<P: AsRef<Path>, T, E: error::Error>(
path: P,
res: Result<T, E>,
) -> T {
match res {
Ok(t) => t,
Err(err) => {
panic!("{}: {:?}", path.as_ref().display(), err);
}
}
}
fn repeat<F: FnMut() -> io::Result<()>>(mut f: F) -> io::Result<()> {
let mut last_err = None;
for _ in 0..10 {
if let Err(err) = f() {
last_err = Some(err);
thread::sleep(Duration::from_millis(500));
} else {
return Ok(());
}
}
Err(last_err.unwrap())
}
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