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machine.js

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  const fetchMachine = Machine({
    id: 'fetch',
    initial: 'idle',
    states: {
      idle: {
        on: {
          FETCH: {
            target: 'loading'          }
        }
      },
      loading: {
        entry: 'testAction',
        invoke: {
          src: 'test',
          onDone: 'success'
        }
      },
      success: {
        type: 'final'
      }
    }
  }, {
    services: {
      test: () => {
        //throw new Error('borky')
        return Promise.reject(new Error('bork'));
      },
      actions: {
        testAction: () => {
          console.log('Running testAction')
          throw new Error('borked action')
        }
      }
    }
  });