feat: add tests for comparing HashMaps

tests/integration_tests.rs

@@ -6,8 +6,9 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  */
 
-use assay::assay;
+use assay::{assay, assert_eq_sorted};
 use std::{
+  collections::HashMap,
   env, fs,
   future::Future,
   path::PathBuf,
@@ -36,6 +37,15 @@ fn include() {
   assert!(fs::metadata("Cargo.toml")?.is_file());
 }
 
+#[assay(should_panic)]
+fn hash_map_comparison() {
+  let map1: HashMap<String, u8> = (0..5).map(|n| (n.to_string(), n)).collect();
+  let mut map2: HashMap<String, u8> = (0..5).map(|n| (n.to_string(), n)).collect();
+  // Force the last item to be different
+  map2.insert("4".to_string(), 5);
+  assert_eq_sorted!(map1, map2);
+}
+
 #[assay]
 async fn async_func() {
   ReadyOnPoll.await;