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//! Gap 1: end-to-end test for `SeferAlloc::with_config`.
//!
//! Proves that the full plumbing chain
//! `SeferAlloc.config → current_for_alloc_with_config → bind_slow_tagged_with_config
//! → claim_with_config → HeapCore::new_with_config → AllocCore::new_with_config`
//! is wired correctly. If any link is broken, either compilation fails (const fn
//! not wired) or the test panics/segfaults at runtime.
//!
//! Because `#[global_allocator]` is process-global, this file is its own binary
//! (each file in `tests/` is a separate test binary).
#![cfg(all(feature = "alloc-global", feature = "alloc-decommit"))]
use sefer_alloc::{LargeCacheConfig, LargeCacheMode, SeferAlloc};
const MIB: usize = 1024 * 1024;
// A restrictive config: 32 MiB budget, small headroom, fast decay.
const CONFIG: LargeCacheConfig = LargeCacheConfig::new()
.budget_bytes(32 * MIB)
.headroom_bytes(4 * MIB)
.decay_interval_ms(100)
.decay_rate_percent(50)
.mode(LargeCacheMode::Lazy);
#[global_allocator]
static GLOBAL: SeferAlloc = SeferAlloc::with_config(CONFIG);
// ── test 1 ──────────────────────────────────────────────────────────────────
/// Large allocation through the configured global allocator succeeds and
/// the memory is readable/writable.
#[test]
fn large_alloc_through_configured_global() {
// 4 MiB allocation — well within the 32 MiB budget.
let mut v: Vec<u8> = Vec::with_capacity(4 * MIB);
v.resize(4 * MIB, 0xAB);
assert_eq!(v.len(), 4 * MIB);
assert_eq!(v[0], 0xAB);
assert_eq!(v[4 * MIB - 1], 0xAB);
drop(v);
}
// ── test 2 ──────────────────────────────────────────────────────────────────
/// Multiple allocations and frees through the configured allocator.
#[test]
fn multiple_allocs_and_frees() {
for _ in 0..4 {
let mut v: Vec<u8> = Vec::with_capacity(2 * MIB);
v.resize(2 * MIB, 0xCD);
assert_eq!(v[MIB], 0xCD);
drop(v);
}
}
// ── test 3 ──────────────────────────────────────────────────────────────────
/// Small allocations (Box, String) also work through the configured allocator.
#[test]
fn small_allocs_work() {
let b = Box::new(42u64);
assert_eq!(*b, 42);
let s = String::from("sefer-alloc end-to-end config test");
assert_eq!(s.len(), 34);
}