error: expected `fn`
 --> $DIR/fail_if_item_is_not_a_function.rs:5:1
  |
5 | struct A {}
  | ^^^^^^

error[E0601]: `main` function not found in crate `$CRATE`
 --> $DIR/fail_if_item_is_not_a_function.rs:4:1
  |
4 | / #[ockam_node_test_attribute::node]
5 | | struct A {}
  | |___________^ consider adding a `main` function to `$DIR/tests/node/fail_if_item_is_not_a_function.rs`