### Question:
ReplayController { @PostMapping("/replay") public String replay() { replayer.replay("nl.fourscouts.blog.replays.projections"); return "Replay started..."; }  @PostMapping("/replay") String replay(); @GetMapping("/replay") String progress();  }### Answer:
@Test void shouldStartReplay() throws Exception { mvc .perform(post("/replay")) .andExpect(status().isOk()); verify(replayer).replay(any()); }