example of getMapEntry

[kicksomedust]

I can't find an example of simnet.getMapEntry.
It 's use seems to be quite straightforward, but there is an issue if I want to use a string as the key type for the map.
It won't find the mapped value.
Unless someone tells me that I'm doing it all wrong.

            let key: ClarityValue = Cl.stringUtf8("test1");
            let value: ClarityValue = Cl.stringUtf8("do something");

            //first add something
            const addMessage: any = simnet.callPublicFn("hello-stacks", "add-message", [key, value], address);
            expect(addMessage.result.type).toBe(ClarityType.ResponseOk);
            expect(addMessage.result.value.data).toBe("do something");
            console.log("1 ok");

            //then try to retrieve it
            let key: ClarityValue = Cl.stringUtf8("test1");
            const found: ClarityValue = simnet.getMapEntry("hello-stacks", "messages", key);
            expect(found).toBe("do something");
            console.log("6 ok");