Add snapshot test using insta

Cargo.toml

@@ -68,6 +68,8 @@ which = "7.0"
 
 [dev-dependencies]
 env_logger = "0.11"
+git2-testing = { path = "./git2-testing" }
+insta = { version = "1.41.0", features = ["filters"] }
 pretty_assertions = "1.4"
 tempfile = "3"
 

git2-testing/src/lib.rs

@@ -18,13 +18,18 @@ pub fn repo_init_empty() -> (TempDir, Repository) {
 	(td, repo)
 }
 
-/// initialize test repo in temp path with an empty first commit
-pub fn repo_init() -> (TempDir, Repository) {
+/// initialize test repo in temp path with given suffix and an empty first commit
+pub fn repo_init_suffix<T: AsRef<std::ffi::OsStr>>(
+	suffix: Option<T>,
+) -> (TempDir, Repository) {
 	init_log();
 
 	sandbox_config_files();
 
-	let td = TempDir::new().unwrap();
+	let td = match suffix {
+		Some(suffix) => TempDir::with_suffix(suffix).unwrap(),
+		None => TempDir::new().unwrap(),
+	};
 	let repo = Repository::init(td.path()).unwrap();
 	{
 		let mut config = repo.config().unwrap();
@@ -43,6 +48,11 @@ pub fn repo_init() -> (TempDir, Repository) {
 	(td, repo)
 }
 
+/// initialize test repo in temp path with an empty first commit
+pub fn repo_init() -> (TempDir, Repository) {
+	repo_init_suffix::<&std::ffi::OsStr>(None)
+}
+
 // init log
 fn init_log() {
 	let _ = env_logger::builder()