Make sure all tests run with all features.

tests/mismatched_op.rs

@@ -1,6 +1,7 @@
 use rhai::{Engine, EvalAltResult, RegisterFn};
 
 #[test]
+#[cfg(not(feature = "no_stdlib"))]
 fn test_mismatched_op() {
     let mut engine = Engine::new();
 
@@ -26,17 +27,13 @@ fn test_mismatched_op_custom_type() {
     }
 
     let mut engine = Engine::new();
-    engine.register_type::<TestStruct>();
+    engine.register_type_with_name::<TestStruct>("TestStruct");
     engine.register_fn("new_ts", TestStruct::new);
 
     let r = engine.eval::<i64>("60 + new_ts()");
 
     match r {
-        Err(EvalAltResult::ErrorFunctionNotFound(err, _))
-            if err == "+ (i64, mismatched_op::test_mismatched_op_custom_type::TestStruct)" =>
-        {
-            ()
-        }
+        Err(EvalAltResult::ErrorFunctionNotFound(err, _)) if err == "+ (i64, TestStruct)" => (),
         _ => panic!(),
     }
 }