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import { Machine } from '../src/index';import { start, stop } from '../src/actions';
const lightMachine = Machine({  key: 'light',  initial: 'green',  states: {    green: {      activities: ['fadeInGreen'],      on: {        TIMER: 'yellow'      }    },    yellow: {      on: {        TIMER: 'red'      }    },    red: {      initial: 'walk',      activities: ['activateCrosswalkLight'],      on: {        TIMER: 'green'      },      states: {        walk: { on: { PED_WAIT: 'wait' } },        wait: {          activities: ['blinkCrosswalkLight'],          on: { PED_STOP: 'stop' }        },        stop: {}      }    }  }});
describe('activities with guarded transitions', () => {  const B_ACTIVITY = () => void 0;  const machine = Machine(    {      initial: 'A',      states: {        A: {          on: {            E: 'B'          }        },        B: {          on: {            '': [{ cond: () => false, target: 'A' }]          },          activities: ['B_ACTIVITY']        }      }    },    { activities: { B_ACTIVITY } }  );
  it('should activate even if there are subsequent automatic, but blocked transitions', () => {    let state = machine.initialState;    state = machine.transition(state, 'E');    expect(state.activities.B_ACTIVITY).toBeTruthy();    expect(state.actions).toEqual([      start({ type: 'B_ACTIVITY', id: 'B_ACTIVITY', exec: undefined })    ]);  });});
describe('remembering activities', () => {  const machine = Machine({    initial: 'A',    states: {      A: {        on: {          E: 'B'        }      },      B: {        on: {          E: 'A'        },        activities: ['B_ACTIVITY']      }    }  });
  it('should remember the activities even after an event', () => {    let state = machine.initialState;    state = machine.transition(state, 'E');    state = machine.transition(state, 'IGNORE');    expect(state.activities.B_ACTIVITY).toBeTruthy();  });});
describe('activities', () => {  it('identifies initial activities', () => {    const { initialState } = lightMachine;
    expect(initialState.activities.fadeInGreen).toBeTruthy();  });  it('identifies start activities', () => {    const nextState = lightMachine.transition('yellow', 'TIMER');    expect(nextState.activities.activateCrosswalkLight).toBeTruthy();    expect(nextState.actions).toEqual([start('activateCrosswalkLight')]);  });
  it('identifies start activities for child states and active activities', () => {    const redWalkState = lightMachine.transition('yellow', 'TIMER');    const nextState = lightMachine.transition(redWalkState, 'PED_WAIT');    expect(nextState.activities.activateCrosswalkLight).toBeTruthy();    expect(nextState.activities.blinkCrosswalkLight).toBeTruthy();    expect(nextState.actions).toEqual([start('blinkCrosswalkLight')]);  });
  it('identifies stop activities for child states', () => {    const redWalkState = lightMachine.transition('yellow', 'TIMER');    const redWaitState = lightMachine.transition(redWalkState, 'PED_WAIT');    const nextState = lightMachine.transition(redWaitState, 'PED_STOP');
    expect(nextState.activities.activateCrosswalkLight).toBeTruthy();    expect(nextState.activities.blinkCrosswalkLight).toBe(false);    expect(nextState.actions).toEqual([stop('blinkCrosswalkLight')]);  });
  it('identifies multiple stop activities for child and parent states', () => {    const redWalkState = lightMachine.transition('yellow', 'TIMER');    const redWaitState = lightMachine.transition(redWalkState, 'PED_WAIT');    const redStopState = lightMachine.transition(redWaitState, 'PED_STOP');    const nextState = lightMachine.transition(redStopState, 'TIMER');
    expect(nextState.activities.fadeInGreen).toBeTruthy();    expect(nextState.activities.activateCrosswalkLight).toBe(false);    expect(nextState.activities.blinkCrosswalkLight).toBe(false);
    expect(nextState.actions).toEqual([      stop('activateCrosswalkLight'),      start('fadeInGreen')    ]);  });});
describe('transient activities', () => {  const machine = Machine({    type: 'parallel',    states: {      A: {        activities: ['A'],        initial: 'A1',        states: {          A1: {            activities: ['A1'],            on: {              A: 'AWAIT'            }          },          AWAIT: {            activities: ['AWAIT'],            on: {              '': 'A2'            }          },          A2: {            activities: ['A2'],            on: {              A: 'A1'            }          }        },        on: {          A1: '.A1',          A2: '.A2'        }      },      B: {        initial: 'B1',        activities: ['B'],        states: {          B1: {            activities: ['B1'],            on: {              '': [                {                  in: 'A.AWAIT',                  target: 'B2'                }              ],              B: 'B2'            }          },          B2: {            activities: ['B2'],            on: {              B: 'B1'            }          }        },        on: {          B1: '.B1',          B2: '.B2'        }      },      C: {        initial: 'C1',        states: {          C1: {            activities: ['C1'],            on: {              C: 'C1',              C_SIMILAR: 'C2'            }          },          C2: {            activities: ['C1']          }        }      }    }  });
  it('should have started initial activities', () => {    const state = machine.initialState;    expect(state.activities.A).toBeTruthy();  });
  it('should have started deep initial activities', () => {    const state = machine.initialState;    expect(state.activities.A1).toBeTruthy();  });
  it('should have kept existing activities', () => {    let state = machine.initialState;    state = machine.transition(state, 'A');    expect(state.activities.A).toBeTruthy();  });
  it('should have kept same activities', () => {    let state = machine.initialState;    state = machine.transition(state, 'C_SIMILAR');    expect(state.activities.C1).toBeTruthy();  });
  it('should have kept same activities after self transition', () => {    let state = machine.initialState;    state = machine.transition(state, 'C');    expect(state.activities.C1).toBeTruthy();  });
  it('should have stopped after automatic transitions', () => {    let state = machine.initialState;    state = machine.transition(state, 'A');    expect(state.value).toEqual({ A: 'A2', B: 'B2', C: 'C1' });    expect(state.activities.B2).toBeTruthy();  });});