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coreutils/tests/common/util.rs

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// * This file is part of the uutils coreutils package.
// *
// * For the full copyright and license information, please view the LICENSE
// * file that was distributed with this source code.
//spell-checker: ignore (linux) rlimit prlimit Rlim coreutil
#![allow(dead_code)]
use pretty_assertions::assert_eq;
#[cfg(target_os = "linux")]
use rlimit::{prlimit, rlim};
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#[cfg(unix)]
use std::borrow::Cow;
use std::env;
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#[cfg(not(windows))]
use std::ffi::CString;
use std::ffi::OsStr;
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use std::fs::{self, hard_link, File, OpenOptions};
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use std::io::{Read, Result, Write};
#[cfg(unix)]
use std::os::unix::fs::{symlink as symlink_dir, symlink as symlink_file};
#[cfg(windows)]
use std::os::windows::fs::{symlink_dir, symlink_file};
use std::path::{Path, PathBuf};
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use std::process::{Child, Command, Stdio};
use std::rc::Rc;
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use std::thread::sleep;
use std::time::Duration;
use tempfile::TempDir;
use uucore::{Args, InvalidEncodingHandling};
#[cfg(windows)]
static PROGNAME: &str = concat!(env!("CARGO_PKG_NAME"), ".exe");
#[cfg(not(windows))]
static PROGNAME: &str = env!("CARGO_PKG_NAME");
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static TESTS_DIR: &str = "tests";
static FIXTURES_DIR: &str = "fixtures";
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static ALREADY_RUN: &str = " you have already run this UCommand, if you want to run \
another command in the same test, use TestScenario::new instead of \
testing();";
static MULTIPLE_STDIN_MEANINGLESS: &str = "Ucommand is designed around a typical use case of: provide args and input stream -> spawn process -> block until completion -> return output streams. For verifying that a particular section of the input stream is what causes a particular behavior, use the Command type directly.";
static NO_STDIN_MEANINGLESS: &str = "Setting this flag has no effect if there is no stdin";
/// Test if the program is running under CI
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pub fn is_ci() -> bool {
std::env::var("CI")
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.unwrap_or_else(|_| String::from("false"))
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.eq_ignore_ascii_case("true")
}
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/// Read a test scenario fixture, returning its bytes
fn read_scenario_fixture<S: AsRef<OsStr>>(tmpd: &Option<Rc<TempDir>>, file_rel_path: S) -> Vec<u8> {
let tmpdir_path = tmpd.as_ref().unwrap().as_ref().path();
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AtPath::new(tmpdir_path).read_bytes(file_rel_path.as_ref().to_str().unwrap())
}
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/// A command result is the outputs of a command (streams and status code)
/// within a struct which has convenience assertion functions about those outputs
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#[derive(Debug, Clone)]
pub struct CmdResult {
//tmpd is used for convenience functions for asserts against fixtures
tmpd: Option<Rc<TempDir>>,
/// exit status for command (if there is one)
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code: Option<i32>,
/// zero-exit from running the Command?
/// see [`success`]
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success: bool,
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/// captured standard output after running the Command
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stdout: Vec<u8>,
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/// captured standard error after running the Command
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stderr: Vec<u8>,
}
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impl CmdResult {
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pub fn new(
tmpd: Option<Rc<TempDir>>,
code: Option<i32>,
success: bool,
stdout: &[u8],
stderr: &[u8],
) -> CmdResult {
CmdResult {
tmpd,
code,
success,
stdout: stdout.to_vec(),
stderr: stderr.to_vec(),
}
}
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/// Returns a reference to the program's standard output as a slice of bytes
pub fn stdout(&self) -> &[u8] {
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&self.stdout
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}
/// Returns the program's standard output as a string slice
pub fn stdout_str(&self) -> &str {
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std::str::from_utf8(&self.stdout).unwrap()
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}
/// Returns the program's standard output as a string
/// consumes self
pub fn stdout_move_str(self) -> String {
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String::from_utf8(self.stdout).unwrap()
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}
/// Returns the program's standard output as a vec of bytes
/// consumes self
pub fn stdout_move_bytes(self) -> Vec<u8> {
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self.stdout
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}
/// Returns a reference to the program's standard error as a slice of bytes
pub fn stderr(&self) -> &[u8] {
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&self.stderr
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}
/// Returns the program's standard error as a string slice
pub fn stderr_str(&self) -> &str {
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std::str::from_utf8(&self.stderr).unwrap()
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}
/// Returns the program's standard error as a string
/// consumes self
pub fn stderr_move_str(self) -> String {
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String::from_utf8(self.stderr).unwrap()
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}
/// Returns the program's standard error as a vec of bytes
/// consumes self
pub fn stderr_move_bytes(self) -> Vec<u8> {
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self.stderr
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}
/// Returns the program's exit code
/// Panics if not run
pub fn code(&self) -> i32 {
self.code.expect("Program must be run first")
}
pub fn code_is(&self, expected_code: i32) -> &CmdResult {
assert_eq!(self.code(), expected_code);
self
}
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/// Returns the program's TempDir
/// Panics if not present
pub fn tmpd(&self) -> Rc<TempDir> {
match &self.tmpd {
Some(ptr) => ptr.clone(),
None => panic!("Command not associated with a TempDir"),
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}
}
/// Returns whether the program succeeded
pub fn succeeded(&self) -> bool {
self.success
}
/// asserts that the command resulted in a success (zero) status code
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pub fn success(&self) -> &CmdResult {
if !self.success {
panic!(
"Command was expected to succeed.\nstdout = {}\n stderr = {}",
self.stdout_str(),
self.stderr_str()
);
}
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self
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}
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/// asserts that the command resulted in a failure (non-zero) status code
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pub fn failure(&self) -> &CmdResult {
if self.success {
panic!(
"Command was expected to fail.\nstdout = {}\n stderr = {}",
self.stdout_str(),
self.stderr_str()
);
}
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self
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}
/// asserts that the command's exit code is the same as the given one
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pub fn status_code(&self, code: i32) -> &CmdResult {
assert_eq!(self.code, Some(code));
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self
}
/// asserts that the command resulted in empty (zero-length) stderr stream output
/// generally, it's better to use stdout_only() instead,
/// but you might find yourself using this function if
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/// 1. you can not know exactly what stdout will be or
/// 2. you know that stdout will also be empty
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pub fn no_stderr(&self) -> &CmdResult {
if !self.stderr.is_empty() {
panic!(
"Expected stderr to be empty, but it's:\n{}",
self.stderr_str()
);
}
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self
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}
/// asserts that the command resulted in empty (zero-length) stderr stream output
/// unless asserting there was neither stdout or stderr, stderr_only is usually a better choice
/// generally, it's better to use stderr_only() instead,
/// but you might find yourself using this function if
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/// 1. you can not know exactly what stderr will be or
/// 2. you know that stderr will also be empty
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pub fn no_stdout(&self) -> &CmdResult {
if !self.stdout.is_empty() {
panic!(
"Expected stdout to be empty, but it's:\n{}",
self.stderr_str()
);
}
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self
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}
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/// asserts that the command resulted in stdout stream output that equals the
/// passed in value, trailing whitespace are kept to force strict comparison (#1235)
/// stdout_only is a better choice unless stderr may or will be non-empty
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pub fn stdout_is<T: AsRef<str>>(&self, msg: T) -> &CmdResult {
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assert_eq!(self.stdout_str(), String::from(msg.as_ref()));
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self
}
/// like `stdout_is`, but succeeds if any elements of `expected` matches stdout.
pub fn stdout_is_any<T: AsRef<str> + std::fmt::Debug>(&self, expected: Vec<T>) -> &CmdResult {
if !expected.iter().any(|msg| self.stdout_str() == msg.as_ref()) {
panic!(
"stdout was {}\nExpected any of {:#?}",
self.stdout_str(),
expected
)
}
self
}
/// Like `stdout_is` but newlines are normalized to `\n`.
pub fn normalized_newlines_stdout_is<T: AsRef<str>>(&self, msg: T) -> &CmdResult {
let msg = msg.as_ref().replace("\r\n", "\n");
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assert_eq!(self.stdout_str().replace("\r\n", "\n"), msg);
self
}
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/// asserts that the command resulted in stdout stream output,
/// whose bytes equal those of the passed in slice
pub fn stdout_is_bytes<T: AsRef<[u8]>>(&self, msg: T) -> &CmdResult {
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assert_eq!(self.stdout, msg.as_ref());
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self
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}
/// like stdout_is(...), but expects the contents of the file at the provided relative path
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pub fn stdout_is_fixture<T: AsRef<OsStr>>(&self, file_rel_path: T) -> &CmdResult {
let contents = read_scenario_fixture(&self.tmpd, file_rel_path);
self.stdout_is(String::from_utf8(contents).unwrap())
}
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/// like stdout_is_fixture(...), but replaces the data in fixture file based on values provided in template_vars
/// command output
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pub fn stdout_is_templated_fixture<T: AsRef<OsStr>>(
&self,
file_rel_path: T,
template_vars: &[(&str, &str)],
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) -> &CmdResult {
let mut contents =
String::from_utf8(read_scenario_fixture(&self.tmpd, file_rel_path)).unwrap();
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for kv in template_vars {
contents = contents.replace(kv.0, kv.1);
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}
self.stdout_is(contents)
}
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/// like `stdout_is_templated_fixture`, but succeeds if any replacement by `template_vars` results in the actual stdout.
pub fn stdout_is_templated_fixture_any<T: AsRef<OsStr>>(
&self,
file_rel_path: T,
template_vars: &[Vec<(String, String)>],
) {
let contents = String::from_utf8(read_scenario_fixture(&self.tmpd, file_rel_path)).unwrap();
let possible_values = template_vars.iter().map(|vars| {
let mut contents = contents.clone();
for kv in vars.iter() {
contents = contents.replace(&kv.0, &kv.1);
}
contents
});
self.stdout_is_any(possible_values.collect());
}
/// asserts that the command resulted in stderr stream output that equals the
/// passed in value, when both are trimmed of trailing whitespace
/// stderr_only is a better choice unless stdout may or will be non-empty
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pub fn stderr_is<T: AsRef<str>>(&self, msg: T) -> &CmdResult {
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assert_eq!(
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self.stderr_str().trim_end(),
String::from(msg.as_ref()).trim_end()
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);
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self
}
/// asserts that the command resulted in stderr stream output,
/// whose bytes equal those of the passed in slice
pub fn stderr_is_bytes<T: AsRef<[u8]>>(&self, msg: T) -> &CmdResult {
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assert_eq!(self.stderr, msg.as_ref());
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self
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}
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/// Like stdout_is_fixture, but for stderr
pub fn stderr_is_fixture<T: AsRef<OsStr>>(&self, file_rel_path: T) -> &CmdResult {
let contents = read_scenario_fixture(&self.tmpd, file_rel_path);
self.stderr_is(String::from_utf8(contents).unwrap())
}
/// asserts that
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/// 1. the command resulted in stdout stream output that equals the
/// passed in value
/// 2. the command resulted in empty (zero-length) stderr stream output
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pub fn stdout_only<T: AsRef<str>>(&self, msg: T) -> &CmdResult {
self.no_stderr().stdout_is(msg)
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}
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/// asserts that
/// 1. the command resulted in a stdout stream whose bytes
/// equal those of the passed in value
/// 2. the command resulted in an empty stderr stream
pub fn stdout_only_bytes<T: AsRef<[u8]>>(&self, msg: T) -> &CmdResult {
self.no_stderr().stdout_is_bytes(msg)
}
/// like stdout_only(...), but expects the contents of the file at the provided relative path
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pub fn stdout_only_fixture<T: AsRef<OsStr>>(&self, file_rel_path: T) -> &CmdResult {
let contents = read_scenario_fixture(&self.tmpd, file_rel_path);
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self.stdout_only_bytes(contents)
}
/// asserts that
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/// 1. the command resulted in stderr stream output that equals the
/// passed in value, when both are trimmed of trailing whitespace
/// 2. the command resulted in empty (zero-length) stdout stream output
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pub fn stderr_only<T: AsRef<str>>(&self, msg: T) -> &CmdResult {
self.no_stdout().stderr_is(msg)
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}
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/// asserts that
/// 1. the command resulted in a stderr stream whose bytes equal the ones
/// of the passed value
/// 2. the command resulted in an empty stdout stream
pub fn stderr_only_bytes<T: AsRef<[u8]>>(&self, msg: T) -> &CmdResult {
self.no_stderr().stderr_is_bytes(msg)
}
pub fn fails_silently(&self) -> &CmdResult {
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assert!(!self.success);
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assert!(self.stderr.is_empty());
self
}
pub fn stdout_contains<T: AsRef<str>>(&self, cmp: T) -> &CmdResult {
assert!(
self.stdout_str().contains(cmp.as_ref()),
"'{}' does not contain '{}'",
self.stdout_str(),
cmp.as_ref()
);
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self
}
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pub fn stderr_contains<T: AsRef<str>>(&self, cmp: T) -> &CmdResult {
assert!(
self.stderr_str().contains(cmp.as_ref()),
"'{}' does not contain '{}'",
self.stderr_str(),
cmp.as_ref()
);
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self
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}
pub fn stdout_does_not_contain<T: AsRef<str>>(&self, cmp: T) -> &CmdResult {
assert!(
!self.stdout_str().contains(cmp.as_ref()),
"'{}' contains '{}' but should not",
self.stdout_str(),
cmp.as_ref(),
);
self
}
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pub fn stderr_does_not_contain<T: AsRef<str>>(&self, cmp: T) -> &CmdResult {
assert!(!self.stderr_str().contains(cmp.as_ref()));
self
}
pub fn stdout_matches(&self, regex: &regex::Regex) -> &CmdResult {
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if !regex.is_match(self.stdout_str().trim()) {
panic!("Stdout does not match regex:\n{}", self.stdout_str())
}
self
}
pub fn stdout_does_not_match(&self, regex: &regex::Regex) -> &CmdResult {
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if regex.is_match(self.stdout_str().trim()) {
panic!("Stdout matches regex:\n{}", self.stdout_str())
}
self
}
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}
pub fn log_info<T: AsRef<str>, U: AsRef<str>>(msg: T, par: U) {
println!("{}: {}", msg.as_ref(), par.as_ref());
}
pub fn recursive_copy(src: &Path, dest: &Path) -> Result<()> {
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if fs::metadata(src)?.is_dir() {
for entry in fs::read_dir(src)? {
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let entry = entry?;
let mut new_dest = PathBuf::from(dest);
new_dest.push(entry.file_name());
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if fs::metadata(entry.path())?.is_dir() {
fs::create_dir(&new_dest)?;
recursive_copy(&entry.path(), &new_dest)?;
} else {
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fs::copy(&entry.path(), new_dest)?;
}
}
}
Ok(())
}
pub fn get_root_path() -> &'static str {
if cfg!(windows) {
"C:\\"
} else {
"/"
}
}
/// Object-oriented path struct that represents and operates on
/// paths relative to the directory it was constructed for.
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#[derive(Clone)]
pub struct AtPath {
pub subdir: PathBuf,
}
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impl AtPath {
pub fn new(subdir: &Path) -> AtPath {
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AtPath {
subdir: PathBuf::from(subdir),
}
}
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pub fn as_string(&self) -> String {
self.subdir.to_str().unwrap().to_owned()
}
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pub fn plus(&self, name: &str) -> PathBuf {
let mut pathbuf = self.subdir.clone();
pathbuf.push(name);
pathbuf
}
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pub fn plus_as_string(&self, name: &str) -> String {
String::from(self.plus(name).to_str().unwrap())
}
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fn minus(&self, name: &str) -> PathBuf {
let prefixed = PathBuf::from(name);
if prefixed.starts_with(&self.subdir) {
let mut unprefixed = PathBuf::new();
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for component in prefixed.components().skip(self.subdir.components().count()) {
unprefixed.push(component.as_os_str().to_str().unwrap());
}
unprefixed
} else {
prefixed
}
}
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pub fn minus_as_string(&self, name: &str) -> String {
String::from(self.minus(name).to_str().unwrap())
}
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pub fn set_readonly(&self, name: &str) {
let metadata = fs::metadata(self.plus(name)).unwrap();
let mut permissions = metadata.permissions();
permissions.set_readonly(true);
fs::set_permissions(self.plus(name), permissions).unwrap();
}
pub fn open(&self, name: &str) -> File {
log_info("open", self.plus_as_string(name));
File::open(self.plus(name)).unwrap()
}
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pub fn read(&self, name: &str) -> String {
let mut f = self.open(name);
let mut contents = String::new();
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f.read_to_string(&mut contents)
.unwrap_or_else(|e| panic!("Couldn't read {}: {}", name, e));
contents
}
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pub fn read_bytes(&self, name: &str) -> Vec<u8> {
let mut f = self.open(name);
let mut contents = Vec::new();
f.read_to_end(&mut contents)
.unwrap_or_else(|e| panic!("Couldn't read {}: {}", name, e));
contents
}
pub fn write(&self, name: &str, contents: &str) {
log_info("open(write)", self.plus_as_string(name));
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std::fs::write(self.plus(name), contents)
.unwrap_or_else(|e| panic!("Couldn't write {}: {}", name, e));
}
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pub fn write_bytes(&self, name: &str, contents: &[u8]) {
log_info("open(write)", self.plus_as_string(name));
std::fs::write(self.plus(name), contents)
.unwrap_or_else(|e| panic!("Couldn't write {}: {}", name, e));
}
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pub fn append(&self, name: &str, contents: &str) {
log_info("open(append)", self.plus_as_string(name));
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let mut f = OpenOptions::new()
.write(true)
.append(true)
.open(self.plus(name))
.unwrap();
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f.write_all(contents.as_bytes())
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.unwrap_or_else(|e| panic!("Couldn't write {}: {}", name, e));
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}
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pub fn append_bytes(&self, name: &str, contents: &[u8]) {
log_info("open(append)", self.plus_as_string(name));
let mut f = OpenOptions::new()
.write(true)
.append(true)
.open(self.plus(name))
.unwrap();
f.write_all(contents)
.unwrap_or_else(|e| panic!("Couldn't append to {}: {}", name, e));
}
pub fn mkdir(&self, dir: &str) {
log_info("mkdir", self.plus_as_string(dir));
fs::create_dir(&self.plus(dir)).unwrap();
}
pub fn mkdir_all(&self, dir: &str) {
log_info("mkdir_all", self.plus_as_string(dir));
fs::create_dir_all(self.plus(dir)).unwrap();
}
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pub fn make_file(&self, name: &str) -> File {
match File::create(&self.plus(name)) {
Ok(f) => f,
Err(e) => panic!("{}", e),
}
}
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pub fn touch(&self, file: &str) {
log_info("touch", self.plus_as_string(file));
File::create(&self.plus(file)).unwrap();
}
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#[cfg(not(windows))]
pub fn mkfifo(&self, fifo: &str) {
let full_path = self.plus_as_string(fifo);
log_info("mkfifo", &full_path);
unsafe {
let fifo_name: CString = CString::new(full_path).expect("CString creation failed.");
libc::mkfifo(fifo_name.as_ptr(), libc::S_IWUSR | libc::S_IRUSR);
}
}
#[cfg(not(windows))]
pub fn is_fifo(&self, fifo: &str) -> bool {
unsafe {
let name = CString::new(self.plus_as_string(fifo)).unwrap();
let mut stat: libc::stat = std::mem::zeroed();
if libc::stat(name.as_ptr(), &mut stat) >= 0 {
libc::S_IFIFO & stat.st_mode != 0
} else {
false
}
}
}
pub fn hard_link(&self, original: &str, link: &str) {
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log_info(
"hard_link",
&format!(
"{},{}",
self.plus_as_string(original),
self.plus_as_string(link)
),
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);
hard_link(&self.plus(original), &self.plus(link)).unwrap();
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}
pub fn symlink_file(&self, original: &str, link: &str) {
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log_info(
"symlink",
&format!(
"{},{}",
self.plus_as_string(original),
self.plus_as_string(link)
),
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);
symlink_file(&self.plus(original), &self.plus(link)).unwrap();
}
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pub fn symlink_dir(&self, original: &str, link: &str) {
log_info(
"symlink",
&format!(
"{},{}",
self.plus_as_string(original),
self.plus_as_string(link)
),
);
symlink_dir(&self.plus(original), &self.plus(link)).unwrap();
}
pub fn is_symlink(&self, path: &str) -> bool {
log_info("is_symlink", self.plus_as_string(path));
match fs::symlink_metadata(&self.plus(path)) {
Ok(m) => m.file_type().is_symlink(),
Err(_) => false,
}
}
pub fn resolve_link(&self, path: &str) -> String {
log_info("resolve_link", self.plus_as_string(path));
match fs::read_link(&self.plus(path)) {
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Ok(p) => self.minus_as_string(p.to_str().unwrap()),
Err(_) => "".to_string(),
}
}
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pub fn symlink_metadata(&self, path: &str) -> fs::Metadata {
match fs::symlink_metadata(&self.plus(path)) {
Ok(m) => m,
Err(e) => panic!("{}", e),
}
}
pub fn metadata(&self, path: &str) -> fs::Metadata {
match fs::metadata(&self.plus(path)) {
Ok(m) => m,
Err(e) => panic!("{}", e),
}
}
pub fn file_exists(&self, path: &str) -> bool {
match fs::metadata(&self.plus(path)) {
Ok(m) => m.is_file(),
Err(_) => false,
}
}
pub fn dir_exists(&self, path: &str) -> bool {
match fs::metadata(&self.plus(path)) {
Ok(m) => m.is_dir(),
Err(_) => false,
}
}
pub fn root_dir_resolved(&self) -> String {
log_info("current_directory_resolved", "");
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let s = self
.subdir
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.canonicalize()
.unwrap()
.to_str()
.unwrap()
.to_owned();
// Due to canonicalize()'s use of GetFinalPathNameByHandleW() on Windows, the resolved path
// starts with '\\?\' to extend the limit of a given path to 32,767 wide characters.
//
// To address this issue, we remove this prepended string if available.
//
// Source:
// http://stackoverflow.com/questions/31439011/getfinalpathnamebyhandle-without-prepended
let prefix = "\\\\?\\";
// FixME: replace ...
#[allow(clippy::manual_strip)]
if s.starts_with(prefix) {
String::from(&s[prefix.len()..])
} else {
s
}
// ... with ...
// if let Some(stripped) = s.strip_prefix(prefix) {
// String::from(stripped)
// } else {
// s
// }
// ... when using MSRV with stabilized `strip_prefix()`
}
}
/// An environment for running a single uutils test case, serves three functions:
/// 1. centralizes logic for locating the uutils binary and calling the utility
/// 2. provides a unique temporary directory for the test case
/// 3. copies over fixtures for the utility to the temporary directory
///
/// Fixtures can be found under `tests/fixtures/$util_name/`
pub struct TestScenario {
bin_path: PathBuf,
pub util_name: String,
pub fixtures: AtPath,
tmpd: Rc<TempDir>,
}
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impl TestScenario {
pub fn new(util_name: &str) -> TestScenario {
let tmpd = Rc::new(TempDir::new().unwrap());
let ts = TestScenario {
bin_path: {
// Instead of hard coding the path relative to the current
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// directory, use Cargo's OUT_DIR to find path to executable.
// This allows tests to be run using profiles other than debug.
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let target_dir = path_concat!(env!("OUT_DIR"), "..", "..", "..", PROGNAME);
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PathBuf::from(AtPath::new(Path::new(&target_dir)).root_dir_resolved())
},
util_name: String::from(util_name),
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fixtures: AtPath::new(tmpd.as_ref().path()),
tmpd,
};
let mut fixture_path_builder = env::current_dir().unwrap();
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fixture_path_builder.push(TESTS_DIR);
fixture_path_builder.push(FIXTURES_DIR);
fixture_path_builder.push(util_name);
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if let Ok(m) = fs::metadata(&fixture_path_builder) {
if m.is_dir() {
recursive_copy(&fixture_path_builder, &ts.fixtures.subdir).unwrap();
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}
}
ts
}
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/// Returns builder for invoking the target uutils binary. Paths given are
/// treated relative to the environment's unique temporary test directory.
pub fn ucmd(&self) -> UCommand {
let mut cmd = self.cmd(&self.bin_path);
cmd.arg(&self.util_name);
cmd
}
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/// Returns builder for invoking any system command. Paths given are treated
/// relative to the environment's unique temporary test directory.
pub fn cmd<S: AsRef<OsStr>>(&self, bin: S) -> UCommand {
UCommand::new_from_tmp(bin, self.tmpd.clone(), true)
}
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/// Returns builder for invoking any uutils command. Paths given are treated
/// relative to the environment's unique temporary test directory.
pub fn ccmd<S: AsRef<OsStr>>(&self, bin: S) -> UCommand {
let mut cmd = self.cmd(&self.bin_path);
cmd.arg(bin);
cmd
}
// different names are used rather than an argument
// because the need to keep the environment is exceedingly rare.
pub fn ucmd_keepenv(&self) -> UCommand {
let mut cmd = self.cmd_keepenv(&self.bin_path);
cmd.arg(&self.util_name);
cmd
}
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/// Returns builder for invoking any system command. Paths given are treated
/// relative to the environment's unique temporary test directory.
/// Differs from the builder returned by `cmd` in that `cmd_keepenv` does not call
/// `Command::env_clear` (Clears the entire environment map for the child process.)
pub fn cmd_keepenv<S: AsRef<OsStr>>(&self, bin: S) -> UCommand {
UCommand::new_from_tmp(bin, self.tmpd.clone(), false)
}
}
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/// A `UCommand` is a wrapper around an individual Command that provides several additional features
/// 1. it has convenience functions that are more ergonomic to use for piping in stdin, spawning the command
/// and asserting on the results.
/// 2. it tracks arguments provided so that in test cases which may provide variations of an arg in loops
/// the test failure can display the exact call which preceded an assertion failure.
/// 3. it provides convenience construction arguments to set the Command working directory and/or clear its environment.
#[derive(Debug)]
pub struct UCommand {
pub raw: Command,
comm_string: String,
tmpd: Option<Rc<TempDir>>,
has_run: bool,
ignore_stdin_write_error: bool,
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stdin: Option<Stdio>,
stdout: Option<Stdio>,
stderr: Option<Stdio>,
bytes_into_stdin: Option<Vec<u8>>,
#[cfg(target_os = "linux")]
limits: Vec<(rlimit::Resource, rlim, rlim)>,
}
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impl UCommand {
pub fn new<T: AsRef<OsStr>, U: AsRef<OsStr>>(arg: T, curdir: U, env_clear: bool) -> UCommand {
UCommand {
tmpd: None,
has_run: false,
raw: {
let mut cmd = Command::new(arg.as_ref());
cmd.current_dir(curdir.as_ref());
if env_clear {
if cfg!(windows) {
// spell-checker:ignore (dll) rsaenh
// %SYSTEMROOT% is required on Windows to initialize crypto provider
// ... and crypto provider is required for std::rand
// From `procmon`: RegQueryValue HKLM\SOFTWARE\Microsoft\Cryptography\Defaults\Provider\Microsoft Strong Cryptographic Provider\Image Path
// SUCCESS Type: REG_SZ, Length: 66, Data: %SystemRoot%\system32\rsaenh.dll"
for (key, _) in env::vars_os() {
if key.as_os_str() != "SYSTEMROOT" {
cmd.env_remove(key);
}
}
} else {
cmd.env_clear();
}
}
cmd
},
comm_string: String::from(arg.as_ref().to_str().unwrap()),
ignore_stdin_write_error: false,
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bytes_into_stdin: None,
stdin: None,
stdout: None,
stderr: None,
#[cfg(target_os = "linux")]
limits: vec![],
}
}
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pub fn new_from_tmp<T: AsRef<OsStr>>(arg: T, tmpd: Rc<TempDir>, env_clear: bool) -> UCommand {
let tmpd_path_buf = String::from(&(*tmpd.as_ref().path().to_str().unwrap()));
let mut ucmd: UCommand = UCommand::new(arg.as_ref(), tmpd_path_buf, env_clear);
ucmd.tmpd = Some(tmpd);
ucmd
}
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pub fn set_stdin<T: Into<Stdio>>(&mut self, stdin: T) -> &mut UCommand {
self.stdin = Some(stdin.into());
self
}
pub fn set_stdout<T: Into<Stdio>>(&mut self, stdout: T) -> &mut UCommand {
self.stdout = Some(stdout.into());
self
}
pub fn set_stderr<T: Into<Stdio>>(&mut self, stderr: T) -> &mut UCommand {
self.stderr = Some(stderr.into());
self
}
/// Add a parameter to the invocation. Path arguments are treated relative
/// to the test environment directory.
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pub fn arg<S: AsRef<OsStr>>(&mut self, arg: S) -> &mut UCommand {
if self.has_run {
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panic!("{}", ALREADY_RUN);
}
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self.comm_string.push(' ');
self.comm_string
.push_str(arg.as_ref().to_str().unwrap_or_default());
self.raw.arg(arg.as_ref());
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self
}
/// Add multiple parameters to the invocation. Path arguments are treated relative
/// to the test environment directory.
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pub fn args<S: AsRef<OsStr>>(&mut self, args: &[S]) -> &mut UCommand {
if self.has_run {
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panic!("{}", MULTIPLE_STDIN_MEANINGLESS);
}
let strings = args
.iter()
.map(|s| s.as_ref().to_os_string())
.collect_str(InvalidEncodingHandling::Ignore)
.accept_any();
for s in strings {
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self.comm_string.push(' ');
self.comm_string.push_str(&s);
}
self.raw.args(args.as_ref());
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self
}
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/// provides standard input to feed in to the command when spawned
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pub fn pipe_in<T: Into<Vec<u8>>>(&mut self, input: T) -> &mut UCommand {
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if self.bytes_into_stdin.is_some() {
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panic!("{}", MULTIPLE_STDIN_MEANINGLESS);
}
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self.bytes_into_stdin = Some(input.into());
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self
}
/// like pipe_in(...), but uses the contents of the file at the provided relative path as the piped in data
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pub fn pipe_in_fixture<S: AsRef<OsStr>>(&mut self, file_rel_path: S) -> &mut UCommand {
let contents = read_scenario_fixture(&self.tmpd, file_rel_path);
self.pipe_in(contents)
}
/// Ignores error caused by feeding stdin to the command.
/// This is typically useful to test non-standard workflows
/// like feeding something to a command that does not read it
pub fn ignore_stdin_write_error(&mut self) -> &mut UCommand {
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if self.bytes_into_stdin.is_none() {
panic!("{}", NO_STDIN_MEANINGLESS);
}
self.ignore_stdin_write_error = true;
self
}
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pub fn env<K, V>(&mut self, key: K, val: V) -> &mut UCommand
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where
K: AsRef<OsStr>,
V: AsRef<OsStr>,
{
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if self.has_run {
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panic!("{}", ALREADY_RUN);
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}
self.raw.env(key, val);
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self
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}
#[cfg(target_os = "linux")]
pub fn with_limit(
&mut self,
resource: rlimit::Resource,
soft_limit: rlim,
hard_limit: rlim,
) -> &mut Self {
self.limits.push((resource, soft_limit, hard_limit));
self
}
/// Spawns the command, feeds the stdin if any, and returns the
/// child process immediately.
pub fn run_no_wait(&mut self) -> Child {
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if self.has_run {
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panic!("{}", ALREADY_RUN);
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}
self.has_run = true;
log_info("run", &self.comm_string);
let mut child = self
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.raw
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.stdin(self.stdin.take().unwrap_or_else(Stdio::piped))
.stdout(self.stdout.take().unwrap_or_else(Stdio::piped))
.stderr(self.stderr.take().unwrap_or_else(Stdio::piped))
.spawn()
.unwrap();
#[cfg(target_os = "linux")]
for &(resource, soft_limit, hard_limit) in &self.limits {
prlimit(
child.id() as i32,
resource,
Some((soft_limit, hard_limit)),
None,
)
.unwrap();
}
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if let Some(ref input) = self.bytes_into_stdin {
let write_result = child
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.stdin
.take()
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.unwrap_or_else(|| panic!("Could not take child process stdin"))
.write_all(input);
if !self.ignore_stdin_write_error {
if let Err(e) = write_result {
panic!("failed to write to stdin of child: {}", e)
}
}
}
child
}
/// Spawns the command, feeds the stdin if any, waits for the result
/// and returns a command result.
/// It is recommended that you instead use succeeds() or fails()
pub fn run(&mut self) -> CmdResult {
let prog = self.run_no_wait().wait_with_output().unwrap();
CmdResult {
tmpd: self.tmpd.clone(),
code: prog.status.code(),
success: prog.status.success(),
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stdout: prog.stdout,
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stderr: prog.stderr,
}
}
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/// Spawns the command, feeding the passed in stdin, waits for the result
/// and returns a command result.
/// It is recommended that, instead of this, you use a combination of pipe_in()
/// with succeeds() or fails()
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pub fn run_piped_stdin<T: Into<Vec<u8>>>(&mut self, input: T) -> CmdResult {
self.pipe_in(input).run()
}
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/// Spawns the command, feeds the stdin if any, waits for the result,
/// asserts success, and returns a command result.
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pub fn succeeds(&mut self) -> CmdResult {
let cmd_result = self.run();
cmd_result.success();
cmd_result
}
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/// Spawns the command, feeds the stdin if any, waits for the result,
/// asserts failure, and returns a command result.
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pub fn fails(&mut self) -> CmdResult {
let cmd_result = self.run();
cmd_result.failure();
cmd_result
}
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pub fn get_full_fixture_path(&self, file_rel_path: &str) -> String {
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let tmpdir_path = self.tmpd.as_ref().unwrap().path();
format!("{}/{}", tmpdir_path.to_str().unwrap(), file_rel_path)
}
}
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pub fn read_size(child: &mut Child, size: usize) -> String {
let mut output = Vec::new();
output.resize(size, 0);
sleep(Duration::from_secs(1));
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child
.stdout
.as_mut()
.unwrap()
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.read_exact(output.as_mut_slice())
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.unwrap();
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String::from_utf8(output).unwrap()
}
pub fn vec_of_size(n: usize) -> Vec<u8> {
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let result = vec![b'a'; n];
assert_eq!(result.len(), n);
result
}
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pub fn whoami() -> String {
// Apparently some CI environments have configuration issues, e.g. with 'whoami' and 'id'.
//
// From the Logs: "Build (ubuntu-18.04, x86_64-unknown-linux-gnu, feat_os_unix, use-cross)"
// whoami: cannot find name for user ID 1001
// id --name: cannot find name for user ID 1001
// id --name: cannot find name for group ID 116
//
// However, when running "id" from within "/bin/bash" it looks fine:
// id: "uid=1001(runner) gid=118(docker) groups=118(docker),4(adm),101(systemd-journal)"
// whoami: "runner"
// Use environment variable to get current user instead of
// invoking `whoami` and fall back to user "nobody" on error.
std::env::var("USER").unwrap_or_else(|e| {
println!("{}: {}, using \"nobody\" instead", UUTILS_WARNING, e);
"nobody".to_string()
})
}
/// Add prefix 'g' for `util_name` if not on linux
#[cfg(unix)]
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pub fn host_name_for(util_name: &str) -> Cow<str> {
// In some environments, e.g. macOS/freebsd, the GNU coreutils are prefixed with "g"
// to not interfere with the BSD counterparts already in `$PATH`.
#[cfg(not(target_os = "linux"))]
return format!("g{}", util_name).into();
#[cfg(target_os = "linux")]
return util_name.into();
}
// GNU coreutils version 8.32 is the reference version since it is the latest version and the
// GNU test suite in "coreutils/.github/workflows/GnuTests.yml" runs against it.
// However, here 8.30 was chosen because right now there's no ubuntu image for the github actions
// CICD available with a higher version than 8.30.
// GNU coreutils versions from the CICD images for comparison:
// ubuntu-2004: 8.30 (latest)
// ubuntu-1804: 8.28
// macos-latest: 8.32
const VERSION_MIN: &str = "8.30"; // minimum Version for the reference `coreutil` in `$PATH`
const UUTILS_WARNING: &str = "uutils-tests-warning";
const UUTILS_INFO: &str = "uutils-tests-info";
/// Run `util_name --version` and return Ok if the version is >= `version_expected`.
/// Returns an error if
/// * `util_name` cannot run
/// * the version cannot be parsed
/// * the version is too low
///
/// This is used by `expected_result` to check if the coreutils version is >= `VERSION_MIN`.
/// It makes sense to use this manually in a test if a feature
/// is tested that was introduced after `VERSION_MIN`
///
/// Example:
///
/// ```no_run
/// use crate::common::util::*;
/// const VERSION_MIN_MULTIPLE_USERS: &str = "8.31";
///
/// #[test]
/// fn test_xyz() {
/// unwrap_or_return!(check_coreutil_version(
/// util_name!(),
/// VERSION_MIN_MULTIPLE_USERS
/// ));
/// // proceed with the test...
/// }
/// ```
#[cfg(unix)]
pub fn check_coreutil_version(
util_name: &str,
version_expected: &str,
) -> std::result::Result<String, String> {
// example:
// $ id --version | head -n 1
// id (GNU coreutils) 8.32.162-4eda
let util_name = &host_name_for(util_name);
log_info("run", format!("{} --version", util_name));
let version_check = match Command::new(util_name.as_ref())
.env("LC_ALL", "C")
.arg("--version")
.output()
{
Ok(s) => s,
Err(e) => {
return Err(format!(
"{}: '{}' {}",
UUTILS_WARNING,
util_name,
e.to_string()
))
}
};
std::str::from_utf8(&version_check.stdout).unwrap()
.split('\n')
.collect::<Vec<_>>()
.get(0)
.map_or_else(
|| Err(format!("{}: unexpected output format for reference coreutil: '{} --version'", UUTILS_WARNING, util_name)),
|s| {
if s.contains(&format!("(GNU coreutils) {}", version_expected)) {
Ok(format!("{}: {}", UUTILS_INFO, s.to_string()))
} else if s.contains("(GNU coreutils)") {
let version_found = s.split_whitespace().last().unwrap()[..4].parse::<f32>().unwrap_or_default();
let version_expected = version_expected.parse::<f32>().unwrap_or_default();
if version_found > version_expected {
Ok(format!("{}: version for the reference coreutil '{}' is higher than expected; expected: {}, found: {}", UUTILS_INFO, util_name, version_expected, version_found))
} else {
Err(format!("{}: version for the reference coreutil '{}' does not match; expected: {}, found: {}", UUTILS_WARNING, util_name, version_expected, version_found)) }
} else {
Err(format!("{}: no coreutils version string found for reference coreutils '{} --version'", UUTILS_WARNING, util_name))
}
},
)
}
/// This runs the GNU coreutils `util_name` binary in `$PATH` in order to
/// dynamically gather reference values on the system.
/// If the `util_name` in `$PATH` doesn't include a coreutils version string,
/// or the version is too low, this returns an error and the test should be skipped.
///
/// Example:
///
/// ```no_run
/// use crate::common::util::*;
/// #[test]
/// fn test_xyz() {
/// let ts = TestScenario::new(util_name!());
/// let result = ts.ucmd().run();
/// let exp_result = unwrap_or_return!(expected_result(&ts, &[]));
/// result
/// .stdout_is(exp_result.stdout_str())
/// .stderr_is(exp_result.stderr_str())
/// .code_is(exp_result.code());
/// }
///```
#[cfg(unix)]
pub fn expected_result(ts: &TestScenario, args: &[&str]) -> std::result::Result<CmdResult, String> {
let util_name = &host_name_for(&ts.util_name);
println!("{}", check_coreutil_version(util_name, VERSION_MIN)?);
let result = ts
.cmd_keepenv(util_name.as_ref())
.env("LC_ALL", "C")
.args(args)
.run();
let (stdout, stderr): (String, String) = if cfg!(target_os = "linux") {
(
result.stdout_str().to_string(),
result.stderr_str().to_string(),
)
} else {
// `host_name_for` added prefix, strip 'g' prefix from results:
let from = util_name.to_string() + ":";
let to = &from[1..];
(
result.stdout_str().replace(&from, to),
result.stderr_str().replace(&from, to),
)
};
Ok(CmdResult::new(
Some(result.tmpd()),
Some(result.code()),
result.succeeded(),
stdout.as_bytes(),
stderr.as_bytes(),
))
}
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/// Sanity checks for test utils
#[cfg(test)]
mod tests {
// spell-checker:ignore (tests) asdfsadfa
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use super::*;
#[test]
fn test_code_is() {
let res = CmdResult {
tmpd: None,
code: Some(32),
success: false,
stdout: "".into(),
stderr: "".into(),
};
res.code_is(32);
}
#[test]
#[should_panic]
fn test_code_is_fail() {
let res = CmdResult {
tmpd: None,
code: Some(32),
success: false,
stdout: "".into(),
stderr: "".into(),
};
res.code_is(1);
}
#[test]
fn test_failure() {
let res = CmdResult {
tmpd: None,
code: None,
success: false,
stdout: "".into(),
stderr: "".into(),
};
res.failure();
}
#[test]
#[should_panic]
fn test_failure_fail() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "".into(),
stderr: "".into(),
};
res.failure();
}
#[test]
fn test_success() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "".into(),
stderr: "".into(),
};
res.success();
}
#[test]
#[should_panic]
fn test_success_fail() {
let res = CmdResult {
tmpd: None,
code: None,
success: false,
stdout: "".into(),
stderr: "".into(),
};
res.success();
}
#[test]
fn test_no_stderr_output() {
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let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "".into(),
stderr: "".into(),
};
res.no_stderr();
res.no_stdout();
}
#[test]
#[should_panic]
fn test_no_stderr_fail() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "".into(),
stderr: "asdfsadfa".into(),
};
res.no_stderr();
}
#[test]
#[should_panic]
fn test_no_stdout_fail() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "asdfsadfa".into(),
stderr: "".into(),
};
res.no_stdout();
}
#[test]
fn test_std_does_not_contain() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "This is a likely error message\n".into(),
stderr: "This is a likely error message\n".into(),
};
res.stdout_does_not_contain("unlikely");
res.stderr_does_not_contain("unlikely");
}
#[test]
#[should_panic]
fn test_stdout_does_not_contain_fail() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "This is a likely error message\n".into(),
stderr: "".into(),
};
res.stdout_does_not_contain("likely");
}
#[test]
#[should_panic]
fn test_stderr_does_not_contain_fail() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "".into(),
stderr: "This is a likely error message\n".into(),
};
res.stderr_does_not_contain("likely");
}
#[test]
fn test_stdout_matches() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "This is a likely error message\n".into(),
stderr: "This is a likely error message\n".into(),
};
let positive = regex::Regex::new(".*likely.*").unwrap();
let negative = regex::Regex::new(".*unlikely.*").unwrap();
res.stdout_matches(&positive);
res.stdout_does_not_match(&negative);
}
#[test]
#[should_panic]
fn test_stdout_matches_fail() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "This is a likely error message\n".into(),
stderr: "This is a likely error message\n".into(),
};
let negative = regex::Regex::new(".*unlikely.*").unwrap();
res.stdout_matches(&negative);
}
#[test]
#[should_panic]
fn test_stdout_not_matches_fail() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "This is a likely error message\n".into(),
stderr: "This is a likely error message\n".into(),
};
let positive = regex::Regex::new(".*likely.*").unwrap();
res.stdout_does_not_match(&positive);
}
#[test]
fn test_normalized_newlines_stdout_is() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "A\r\nB\nC".into(),
stderr: "".into(),
};
res.normalized_newlines_stdout_is("A\r\nB\nC");
res.normalized_newlines_stdout_is("A\nB\nC");
res.normalized_newlines_stdout_is("A\nB\r\nC");
}
#[test]
#[should_panic]
fn test_normalized_newlines_stdout_is_fail() {
let res = CmdResult {
tmpd: None,
code: None,
success: true,
stdout: "A\r\nB\nC".into(),
stderr: "".into(),
};
res.normalized_newlines_stdout_is("A\r\nB\nC\n");
}
#[test]
#[cfg(unix)]
fn test_check_coreutil_version() {
match check_coreutil_version("id", VERSION_MIN) {
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Ok(s) => assert!(s.starts_with("uutils-tests-")),
Err(s) => assert!(s.starts_with("uutils-tests-warning")),
};
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#[cfg(target_os = "linux")]
std::assert_eq!(
check_coreutil_version("no test name", VERSION_MIN),
Err("uutils-tests-warning: 'no test name' \
No such file or directory (os error 2)"
.to_string())
);
}
#[test]
#[cfg(unix)]
fn test_expected_result() {
let ts = TestScenario::new("id");
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// assert!(expected_result(&ts, &[]).is_ok());
match expected_result(&ts, &[]) {
Ok(r) => assert!(r.succeeded()),
Err(s) => assert!(s.starts_with("uutils-tests-warning")),
}
let ts = TestScenario::new("no test name");
assert!(expected_result(&ts, &[]).is_err());
}
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}