dellingr 0.2.0

An embeddable, pure-Rust Lua VM with precise instruction-cost accounting
Documentation 
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//! Integration tests that run all Lua example files.

use std::fs;
use std::path::{Path, PathBuf};
use std::process::Command;

#[test]
fn run_feature_test_extended_in_process() {
    let source = fs::read_to_string("examples/feature_test_extended.lua")
        .expect("Failed to read feature_test_extended.lua");
    let mut state = dellingr::State::new();
    state
        .load_string_named(
            &source,
            Some("examples/feature_test_extended.lua".to_string()),
        )
        .unwrap();
    state
        .call(dellingr::ArgCount::Fixed(0), dellingr::RetCount::Fixed(0))
        .unwrap();
}

fn collect_lua_files(dir: &Path, out: &mut Vec<PathBuf>) {
    let entries = fs::read_dir(dir).expect("Failed to read directory");
    for entry in entries {
        let entry = entry.expect("Failed to read directory entry");
        let path = entry.path();
        if path.is_dir() {
            collect_lua_files(&path, out);
        } else if path.extension().is_some_and(|ext| ext == "lua") {
            out.push(path);
        }
    }
}

/// Run all .lua files in the examples directory (recursively) and check they
/// complete without errors.
#[test]
fn run_all_examples() {
    let examples_dir = Path::new("examples");

    assert!(examples_dir.exists(), "examples directory not found");

    let mut files: Vec<PathBuf> = Vec::new();
    collect_lua_files(examples_dir, &mut files);
    files.sort();

    assert!(
        !files.is_empty(),
        "No .lua files found in examples directory"
    );

    let mut failures = Vec::new();

    for path in &files {
        let display = path.strip_prefix("examples").unwrap_or(path).display();

        println!("Running: {display}");

        let output = Command::new("cargo")
            .args(["run", "--quiet", "--", path.to_str().unwrap()])
            .output()
            .expect("Failed to execute command");

        if !output.status.success() {
            let stderr = String::from_utf8_lossy(&output.stderr);
            let stdout = String::from_utf8_lossy(&output.stdout);
            failures.push(format!(
                "{}: exit code {:?}\nstdout: {}\nstderr: {}",
                display,
                output.status.code(),
                stdout,
                stderr
            ));
        } else {
            let stdout = String::from_utf8_lossy(&output.stdout);
            // Check for "false" in output which indicates a test failure
            if stdout.contains(": false") {
                failures.push(format!(
                    "{display}: test assertion failed\noutput: {stdout}"
                ));
            }
        }
    }

    if !failures.is_empty() {
        panic!(
            "\n{} example(s) failed:\n\n{}",
            failures.len(),
            failures.join("\n\n")
        );
    }

    println!("\nAll {} examples passed!", files.len());
}