Add test

The rename function should not change any path segments that refer to a
module by super.

crates/ide/src/rename.rs

@@ -1108,6 +1108,31 @@ pub mod foo$0;
         );
     }
 
+    #[test]
+    fn test_rename_mod_ref_by_super() {
+        check(
+            "baz",
+            r#"
+        mod $0foo {
+        struct X;
+
+        mod bar {
+            use super::X;
+        }
+    }
+            "#,
+            r#"
+        mod baz {
+        struct X;
+
+        mod bar {
+            use super::X;
+        }
+    }
+            "#,
+        )
+    }
+
     #[test]
     fn test_enum_variant_from_module_1() {
         cov_mark::check!(rename_non_local);