Spring Boot REST: тестироем rest методы

requests.js

// GET all
fetch('/message/').then(response => response.json().then(console.log))

// GET one
fetch('/message/2').then(response => response.json().then(console.log))

// POST add new one
fetch(
  '/message', 
  { 
    method: 'POST', 
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ text: 'Fourth message (4)', id: 10 })
  }
).then(result => result.json().then(console.log))

// PUT save existing
fetch(
  '/message/4', 
  { 
    method: 'PUT', 
    headers: { 'Content-Type': 'application/json' }, 
    body: JSON.stringify({ text: 'Fourth message', id: 10 })
  }
).then(result => result.json().then(console.log));

// DELETE existing
fetch('/message/4', { method: 'DELETE' }).then(result => console.log(result))