Shared bootstrap helpers for RustFS integration tests (backlog#1153 infra-1). Owns the "build a real temp-disk ECStore" setup that used to be copy-pasted across the heal/iam/scanner integration tests and had already drifted.

Usage

// [dev-dependencies] rustfs-test-utils = { workspace = true }
use rustfs_test_utils::TestECStoreEnv;

let env = TestECStoreEnv::builder()
    .prefix("rustfs_myfeature_test") // /tmp/<prefix>_<uuid>
    .disk_count(4)                   // single pool, single set
    .build()
    .await;

env.make_bucket("my-bucket", /* versioned = */ true).await;
// env.ecstore : Arc<ECStore>       — bootstrapped store
// env.disk_paths : Vec<PathBuf>    — disk1..diskN for fault injection
// env.temp_root : PathBuf          — root dir (leaked by design, see below)

Builder knobs:

disk_count(n) — disks in the single erasure set (default 4).
prefix(&str) — temp-dir prefix; a uuid suffix keeps parallel nextest processes isolated.
base_dir(path) — use a caller-owned directory (e.g. tempfile::TempDir) instead; the caller keeps cleanup ownership.
init_bucket_metadata(bool) — run init_bucket_metadata_sys after boot (default true; the IAM bootstrap test opts out).

init_tracing() is exposed separately and is called by build().

The environment does not delete temp_root on drop: a failed test's on-disk state stays inspectable, and heal tests keep manipulating disk_paths after setup. Own the directory via base_dir if you want automatic cleanup.

Constraints

dev-dependency only. No crate may list rustfs-test-utils under [dependencies] — test scaffolding must never reach production binaries.
Single-process integration scope. Multi-node / chaos harnesses are out of scope (backlog#1100). Scanner's lifecycle tests are absorbed only after ilm-1 activates them (they are #[ignore]d today).
All rustfs_ecstore imports stay behind src/ecstore_test_compat.rs — the sanctioned test-compat boundary pattern enforced by scripts/check_architecture_migration_rules.sh. Extend that module, never import the facade directly from other files.
Tests using this env bind 127.0.0.1:0 (random port) and unique temp dirs, so they stay parallel-safe under nextest's process-per-test model — do not add fixed ports or shared paths here. See docs/testing/README.md for the serial/nextest rules.