Add cov_mark

crates/ide/src/hover.rs

@@ -4137,6 +4137,7 @@ pub fn foo() {}
 
     #[test]
     fn hover_attr_path_qualifier() {
+        cov_mark::check!(name_ref_classify_attr_path_qualifier);
         check(
             r#"
 //- /foo.rs crate:foo

crates/ide_db/src/defs.rs

@@ -395,6 +395,7 @@ impl NameRefClass {
                         // Don't wanna collide with builtin attributes here like `test` hence guard
                         // so only resolve to modules that aren't the last segment
                         PathResolution::Def(module @ ModuleDef::Module(_)) if path != top_path => {
+                            cov_mark::hit!(name_ref_classify_attr_path_qualifier);
                             Some(NameRefClass::Definition(Definition::ModuleDef(module)))
                         }
                         PathResolution::Macro(mac) if mac.kind() == hir::MacroKind::Attr => {