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use serde::{Deserialize, Serialize};
use std::{
fs::{self, read_to_string, File},
path::PathBuf,
process::{Command, Stdio},
time::Instant,
};
pub fn main() {
let mut args: Vec<String> = std::env::args().collect();
// name of the process to run
let proc = args.remove(1);
if args.len() > 1 {
let run = traverse(&args)
.and_then(|paths| run_test(&proc, &paths))
.expect("Failed to traverse directory");
println!("{}", serde_json::to_string_pretty(&run).unwrap());
} else {
println!(
r#"Usage: tester [options] <directory>+
Options:
-p, --process The process to run. If the given process is not a
an absolute path, it will be resolved against the
PATH environment variable.
-j, --json Output the results in JSON format (default: false)
-h, --help Display this help message
-v, --version Display the version of the tester
"#
);
}
}
fn traverse(args: &[String]) -> Result<Vec<PathBuf>, String> {
let mut files: Vec<PathBuf> = Vec::new();
for arg in args.iter().skip(1) {
let entries = fs::read_dir(arg).map_err(|e| e.to_string())?;
for entry in entries {
let dir = entry.map_err(|e| e.to_string())?;
let f = dir.metadata().map_err(|e| e.to_string())?;
if f.is_dir() {
files.push(dir.path());
}
}
}
Ok(files)
}
#[derive(Debug, Serialize, Deserialize)]
pub enum TestResult {
TestSucceeded,
TestFailed(String, String),
}
#[derive(Debug, Serialize, Deserialize)]
pub struct TestRun {
file: String,
test_result: TestResult,
duration: u128,
}
fn run_test(proc: &str, files: &Vec<PathBuf>) -> Result<Vec<TestRun>, String> {
let mut result = Vec::new();
for file in files {
let mut inp = file.clone();
let mut outp = file.clone();
inp.push("input");
outp.push("output");
let (test_result, duration) = run_test_case(proc, &inp, &outp)?;
result.push(TestRun {
file: inp.as_path().to_str().unwrap().to_string(),
test_result,
duration,
});
}
Ok(result)
}
fn run_test_case(
proc: &str,
inp: &std::path::PathBuf,
outp: &std::path::PathBuf,
) -> Result<(TestResult, u128), String> {
let input = File::open(inp).map_err(|e| e.to_string())?;
let expected = read_to_string(outp).map_err(|e| e.to_string())?;
let start = Instant::now();
let actual = Command::new(proc)
.stdin(Stdio::from(input))
.output()
.map_err(|e| e.to_string())?;
let duration = (Instant::now() - start).as_millis();
if expected.as_bytes() == actual.stdout {
Ok((TestResult::TestSucceeded, duration))
} else {
let actual_string = String::from_utf8(actual.stdout).map_err(|e| e.to_string())?;
Ok((TestResult::TestFailed(expected, actual_string), duration))
}
}
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