add forget test

Cargo.toml

···
 license = "MIT OR Apache-2.0"
 repository = "https://tangled.sh/did:plc:54jgbo4psy24qu2bk4njtpc4/simple-left-right/"
 description = "Lockfree, realtime safe and copy-free Synchronisation"
+exclude = ["known_mutants_regex.txt"]
 # workspace = "../"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

tests/tests.rs

···
             writer.apply_op(SetToNone);
         }
     }
+
+    #[test]
+    fn forget_lock() {
+        let mut writer: Writer<i32, CounterAddOp> = Writer::new(0);
+        let mut reader = writer.build_reader().unwrap();
+
+        let write = writer.try_lock().unwrap();
+        core::mem::forget(write);
+        let write = writer.try_lock().unwrap();
+
+        let read = reader.lock();
+        core::mem::forget(read);
+        reader.lock();
+    }
 }