add minimal test for sorting issues of loose refs (#1928)

Author: yuja

gix-ref/tests/fixtures/generated-archives/make_repo_for_1928_repro.tar

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -eu -o pipefail
+
+git init -q
+
+mkdir -p .git/refs/heads/a
+cat <<EOF >.git/packed-refs
+# pack-refs with: peeled fully-peeled sorted
+1111111111111111111111111111111111111111 refs/heads/a-
+2222222222222222222222222222222222222222 refs/heads/a/b
+3333333333333333333333333333333333333333 refs/heads/a0
+EOF
+
+mkdir -p .git/refs/heads/a
+echo aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa >.git/refs/heads/a-
+echo bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb >.git/refs/heads/a/b
+echo cccccccccccccccccccccccccccccccccccccccc >.git/refs/heads/a0

gix-ref/tests/fixtures/make_repo_for_1928_repro.sh

@@ -464,6 +464,45 @@ fn overlay_iter_reproduce_1850() -> crate::Result {
     Ok(())
 }
 
+#[test]
+fn overlay_iter_reproduce_1928() -> crate::Result {
+    let store = store_at("make_repo_for_1928_repro.sh")?;
+    let ref_names = store
+        .iter()?
+        .all()?
+        .map(|r| r.map(|r| (r.name.as_bstr().to_owned(), r.target)))
+        .collect::<Result<Vec<_>, _>>()?;
+    insta::assert_debug_snapshot!(ref_names, @r#"
+    [
+        (
+            "refs/heads/a-",
+            Object(
+                Sha1(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa),
+            ),
+        ),
+        (
+            "refs/heads/a/b",
+            Object(
+                Sha1(2222222222222222222222222222222222222222),
+            ),
+        ),
+        (
+            "refs/heads/a0",
+            Object(
+                Sha1(cccccccccccccccccccccccccccccccccccccccc),
+            ),
+        ),
+        (
+            "refs/heads/a/b",
+            Object(
+                Sha1(bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb),
+            ),
+        ),
+    ]
+    "#);
+    Ok(())
+}
+
 #[test]
 fn overlay_iter_with_prefix_wont_allow_absolute_paths() -> crate::Result {
     let store = store_with_packed_refs()?;