lernie 0.0.2

A git-backed agent harness
Documentation 
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//! [`RealGit`] runner tests and the stub-capture delegation check.
//! Split from [`super::tests`] for the per-file line cap.

use super::{GitRunner, RealGit};
use std::io;
use std::path::PathBuf;
use tempfile::TempDir;

#[test]
fn realgit_default_matches_new() {
    let _ = RealGit::default();
}

#[test]
fn realgit_succeeds_on_valid_command() {
    let holder = TempDir::new().unwrap();
    RealGit::new()
        .run(holder.path(), &["init", "-b", "main"])
        .unwrap();
    assert!(holder.path().join(".git").is_dir());
}

#[test]
fn realgit_returns_error_on_nonzero_exit() {
    let holder = TempDir::new().unwrap();
    // No git repo here, so `git status` exits non-zero. That hits
    // the `!status.success()` branch without needing a missing
    // binary.
    let err = RealGit::new()
        .run(holder.path(), &["status", "--porcelain"])
        .unwrap_err();
    let msg = err.to_string();
    assert!(msg.contains("exited with"), "unexpected: {msg}");
}

#[test]
fn realgit_returns_error_when_binary_missing() {
    let holder = TempDir::new().unwrap();
    let git = RealGit {
        bin: PathBuf::from("/no/such/lernie-test-git"),
    };
    let err = git.run(holder.path(), &["init"]).unwrap_err();
    assert_eq!(err.kind(), io::ErrorKind::NotFound);
}

#[test]
fn realgit_run_capture_returns_stdout() {
    // `git --version` prints a line to stdout that RealGit trims.
    let holder = TempDir::new().unwrap();
    let out = RealGit::new()
        .run_capture(holder.path(), &["--version"])
        .unwrap();
    assert!(out.starts_with("git "), "unexpected: {out:?}");
}