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import { Machine } from '../src/index';
const machine = Machine({  type: 'parallel',  states: {    A: {      initial: 'A1',      states: {        A1: {},        A2: {}      }    },    B: {      initial: 'B1',      states: {        B1: {},        B2: {}      }    }  }});
describe('invalid or resolved states', () => {  it('should resolve a String state', () => {    expect(machine.transition('A', 'E').value).toEqual({ A: 'A1', B: 'B1' });  });
  it('should resolve transitions from empty states', () => {    expect(machine.transition({ A: {}, B: {} }, 'E').value).toEqual({      A: 'A1',      B: 'B1'    });  });
  it('should allow transitioning from valid states', () => {    machine.transition({ A: 'A1', B: 'B1' }, 'E');  });
  it('should reject transitioning from bad state configs', () => {    expect(() => machine.transition({ A: 'A3', B: 'B3' }, 'E')).toThrow();  });
  it('should resolve transitioning from partially valid states', () => {    expect(machine.transition({ A: 'A1', B: {} }, 'E').value).toEqual({      A: 'A1',      B: 'B1'    });  });
  it("should resolve transitioning from regions that don't exist (remove region)", () => {    expect(      machine.transition({ A: 'A1', B: 'B1', Z: 'Z1' }, 'E').value    ).toEqual({      A: 'A1',      B: 'B1'    });  });});