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use chan::Receiver;
use std::fmt::Debug;
use std::fs;
use std::fs::File;
use std::fs::OpenOptions;
use std::io::BufReader;
use std::io::prelude::*;
use time;
use datatype::{Error, Package, UpdateResultCode};
use package_manager::package_manager::{InstallOutcome, PackageManager};
impl PackageManager {
/// Creates a new Test Package Manager that writes to a temporary file.
pub fn new_tpm(succeeds: bool) -> Self {
let name = format!("/tmp/sota-tpm-{}", time::precise_time_ns().to_string());
if succeeds {
let _ = File::create(name.clone()).expect("couldn't create Test Package Manager file");
}
PackageManager::File { filename: name, succeeds: succeeds }
}
}
/// Encapsulate a directory whose contents will be destroyed when it drops out of scope.
pub struct TestDir(pub String);
impl TestDir {
/// Create a new test directory that will be destroyed when it drops out of scope.
pub fn new(reason: &str) -> TestDir {
let dir = format!("/tmp/{}-{}", reason, time::precise_time_ns().to_string());
fs::create_dir_all(dir.clone()).expect("couldn't create TempDir");
TestDir(dir)
}
}
impl Drop for TestDir {
fn drop(&mut self) {
fs::remove_dir_all(&self.0.clone()).expect("couldn't remove TempDir");
}
}
/// For each item in the list, assert that it equals the next `Receiver` value.
pub fn assert_rx<X: PartialEq + Debug>(rx: Receiver<X>, xs: &[X]) {
let n = xs.len();
let mut xs = xs.iter();
for _ in 0..n {
let val = rx.recv().expect("assert_rx expected another val");
let x = xs.next().expect(&format!("assert_rx: no match for val: {:?}", val));
assert_eq!(val, *x);
}
}
/// Returns a list of installed packages from a format of `<name> <version>`.
pub fn installed_packages(path: &str) -> Result<Vec<Package>, Error> {
let f = try!(File::open(path));
let reader = BufReader::new(f);
let mut pkgs = Vec::new();
for line in reader.lines() {
let line = try!(line);
let parts = line.split(' ');
if parts.clone().count() == 2 {
if let Some(name) = parts.clone().nth(0) {
if let Some(version) = parts.clone().nth(1) {
pkgs.push(Package {
name: name.to_string(),
version: version.to_string()
});
}
}
}
}
Ok(pkgs)
}
/// Installs a package to the specified path when succeeds is true, or fails otherwise.
pub fn install_package(path: &str, pkg: &str, succeeds: bool) -> Result<InstallOutcome, InstallOutcome> {
if !succeeds {
return Err((UpdateResultCode::INSTALL_FAILED, "failed".to_string()))
}
let outcome = || -> Result<(), Error> {
let mut f = OpenOptions::new().create(true).write(true).append(true).open(path).unwrap();
try!(f.write(pkg.as_bytes()));
try!(f.write(b"\n"));
Ok(())
}();
match outcome {
Ok(_) => Ok((UpdateResultCode::OK, "".to_string())),
Err(err) => Err((UpdateResultCode::INSTALL_FAILED, format!("{:?}", err)))
}
}
#[cfg(test)]
mod tests {
use std::fs::File;
use std::io::prelude::*;
use super::*;
use datatype::Package;
fn pkg1() -> Package {
Package {
name: "apa".to_string(),
version: "0.0.0".to_string()
}
}
fn pkg2() -> Package {
Package {
name: "bepa".to_string(),
version: "1.0.0".to_string()
}
}
#[test]
fn get_installed_packages() {
let dir = TestDir::new("sota-tpm-test-1");
let path = format!("{}/tpm", dir.0);
let mut f = File::create(path.clone()).unwrap();
f.write(b"apa 0.0.0\n").unwrap();
f.write(b"bepa 1.0.0").unwrap();
assert_eq!(installed_packages(&path).unwrap(), vec![pkg1(), pkg2()]);
}
#[test]
fn ignore_bad_installed_packages() {
let dir = TestDir::new("sota-tpm-test-2");
let path = format!("{}/tpm", dir.0);
let mut f = File::create(path.clone()).unwrap();
f.write(b"cepa-2.0.0\n").unwrap();
assert_eq!(installed_packages(&path).unwrap(), Vec::new());
}
#[test]
fn install_packages() {
let dir = TestDir::new("sota-tpm-test-3");
let path = format!("{}/tpm", dir.0);
install_package(&path, "apa 0.0.0", true).unwrap();
install_package(&path, "bepa 1.0.0", true).unwrap();
assert_eq!(installed_packages(&path).unwrap(), vec![pkg1(), pkg2()]);
}
#[test]
fn failed_installation() {
let dir = TestDir::new("sota-tpm-test-4");
let path = format!("{}/tpm", dir.0);
assert!(install_package(&path, "apa 0.0.0", false).is_err());
install_package(&path, "bepa 1.0.0", true).unwrap();
assert_eq!(installed_packages(&path).unwrap(), vec![pkg2()]);
}
}
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