Function TEST

Current context -> swap to context 2 -> run entrypoint of context2 -> -> swap to context 1 -> run entrypoint of context 2 -> swap before `finished` is set to context 2 -> -> run trampoline of context 2 and swap to context 1 -> continue run entrypoint of context 1 and set `finished` to 1 -> -> run trampoline of context 1 and swap to initial context. */