[wip] core: introspection: Test stability of enum type ids

core/src/introspection/test.rs

@@ -1,4 +1,6 @@
-use super::{Introspectable, Introspection, Layout, LexicalId, References, Struct};
+use super::{Enum, Introspectable, Introspection, Layout, LexicalId, References, Struct};
+use crate::ids::TypeId;
+use uuid::uuid;
 
 #[test]
 fn duplicate_lexical_id_good() {
@@ -72,3 +74,30 @@ fn duplicate_lexical_id_bad() {
 
     Introspection::new::<Dup>();
 }
+
+#[test]
+fn basic_enum_type_id() {
+    struct Foo;
+
+    impl Introspectable for Foo {
+        fn layout() -> Layout {
+            Enum::builder("test", "Foo")
+                .variant_with_type(0, "Var1", LexicalId::U8)
+                .unit_variant(1, "Var2")
+                .finish()
+                .into()
+        }
+
+        fn lexical_id() -> LexicalId {
+            LexicalId::custom("test", "Foo")
+        }
+
+        fn add_references(_references: &mut References) {}
+    }
+
+    let type_id = TypeId::compute::<Foo>();
+    assert_eq!(
+        type_id,
+        TypeId(uuid!("f81d8f58-1f03-5be4-a8ac-3220597d7730"))
+    );
+}