- @test/@benchmark on module would attach to interface and regular methods.

releasenotes.md

@@ -81,6 +81,7 @@
 - Fix alignment on jump table.
 - Fix correct `?` after optional function name when reporting type errors.
 - Make `log` and `exp` no-strip.
+- `@test`/`@benchmark` on module would attach to interface and regular methods.
 
 ### Stdlib changes
 - Add `==` to `Pair`, `Triple` and TzDateTime. Add print to `Pair` and `Triple`.

src/compiler/parse_global.c

@@ -1225,8 +1225,12 @@ PARSE_EXPR:
 static bool parse_attributes_for_global(ParseContext *c, Decl *decl)
 {
 	Visibility visibility = c->unit->default_visibility;
-	if (decl->decl_kind == DECL_FUNC) decl->func_decl.attr_test = c->unit->test_by_default;
-	if (decl->decl_kind == DECL_FUNC) decl->func_decl.attr_benchmark = c->unit->benchmark_by_default;
+	// Transfer the test / benchmark properties
+	if (decl->decl_kind == DECL_FUNC && !decl->func_decl.attr_interface_method && !decl->func_decl.type_parent)
+	{
+		decl->func_decl.attr_test = c->unit->test_by_default;
+		decl->func_decl.attr_benchmark = c->unit->benchmark_by_default;
+	}
 	decl->is_export = c->unit->export_by_default;
 	bool is_builtin = false;
 	bool is_cond;
@@ -2692,6 +2696,7 @@ static inline Decl *parse_func_definition(ParseContext *c, AstId contracts, Func
 	Decl *func = decl_calloc();
 	func->decl_kind = DECL_FUNC;
 	func->func_decl.docs = contracts;
+	func->func_decl.attr_interface_method = parse_kind == FUNC_PARSE_INTERFACE;
 	if (!parse_func_macro_header(c, func)) return poisoned_decl;
 	if (func->name[0] == '@')
 	{

src/compiler/sema_decls.c

@@ -954,7 +954,6 @@ static bool sema_analyse_interface(SemaContext *context, Decl *decl, bool *erase
 			SEMA_ERROR(type_infoptr(method->func_decl.type_parent), "Interfaces should not be declared as methods.");
 			return decl_poison(method);
 		}
-		method->func_decl.attr_interface_method = true;
 		bool erase = false;
 
 		// Insert the first parameter, which is the implicit `void*`

test/test_suite/interfaces/interface_test.c3

@@ -0,0 +1,18 @@
+module test;
+import std;
+
+fn int main()
+{
+	return 0;
+}
+
+module foo @test;
+interface Bob
+{
+	fn void test();
+}
+struct Foo
+{
+	int a;
+}
+fn void Foo.test(&self) {}