feat(macros): enhance Integrable derive with validation and versioning improvements

server/crates/arbiter-macros/tests/integrable.rs

@@ -6,20 +6,48 @@ struct TestEntity {
     value: i32,
 }
 
+#[derive(arbiter_macros::Hashable, arbiter_macros::Integrable)]
+#[integrable(kind = "other_entity")]
+struct OtherEntity {
+    label: String,
+    count: u64,
+}
+
 #[test]
-fn default_version_is_one() {
-    assert_eq!(<TestEntity as Integrable>::VERSION, 1, "default version must be 1");
+fn kind_is_set_correctly() {
     assert_eq!(<TestEntity as Integrable>::KIND, "test_entity");
+    assert_eq!(<OtherEntity as Integrable>::KIND, "other_entity");
+}
+
+#[test]
+fn version_is_positive() {
+    const {
+        assert!(<TestEntity as Integrable>::VERSION > 0);
+        assert!(<OtherEntity as Integrable>::VERSION > 0);
+    }
+}
+
+#[test]
+fn different_field_layouts_produce_different_versions() {
+    assert_ne!(
+        <TestEntity as Integrable>::VERSION,
+        <OtherEntity as Integrable>::VERSION,
+    );
 }
 
 #[derive(arbiter_macros::Hashable, arbiter_macros::Integrable)]
-#[integrable(kind = "versioned_entity", version = 3)]
-struct VersionedEntity {
-    data: String,
+#[integrable(kind = "generic_entity")]
+struct GenericEntity<T> {
+    inner: T,
 }
 
 #[test]
-fn explicit_version_attribute() {
-    assert_eq!(<VersionedEntity as Integrable>::VERSION, 3);
-    assert_eq!(<VersionedEntity as Integrable>::KIND, "versioned_entity");
+fn generic_struct_derives_integrable() {
+    assert_eq!(
+        <GenericEntity<TestEntity> as Integrable>::KIND,
+        "generic_entity"
+    );
+    const {
+        assert!(<GenericEntity<TestEntity> as Integrable>::VERSION > 0);
+    }
 }