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import { Machine } from '../src';import { getConfiguration } from '../src/stateUtils';
const testMachine = Machine({  id: 'a',  initial: 'b1',  states: {    b1: {      id: 'b1',      type: 'parallel',      states: {        c1: {          id: 'c1',          initial: 'd1',          states: {            d1: { id: 'd1' },            d2: {              id: 'd2',              initial: 'e1',              states: {                e1: { id: 'e1' },                e2: { id: 'e2' }              }            }          }        },        c2: { id: 'c2' },        c3: {          id: 'c3',          initial: 'd3',          states: {            d3: { id: 'd3' },            d4: {              id: 'd4',              initial: 'e3',              states: {                e3: { id: 'e3' },                e4: { id: 'e4' }              }            }          }        }      }    },    b2: {      id: 'b2',      initial: 'c4',      states: {        c4: { id: 'c4' }      }    },    b3: {      id: 'b3',      initial: 'c5',      states: {        c5: { id: 'c5' },        c6: {          id: 'c6',          type: 'parallel',          states: {            d5: { id: 'd5' },            d6: { id: 'd6' },            d7: { id: 'd7' }          }        }      }    }  }});
describe('algorithm', () => {  it('getConfiguration', () => {    const prevNodes = testMachine.getStateNodes({      b1: {        c1: 'd1',        c2: {},        c3: 'd3'      }    });    const nodes = ['c1', 'd4'].map((id) => testMachine.getStateNodeById(id));
    const c = getConfiguration(prevNodes, nodes);
    expect([...c].map((sn) => sn.id).sort()).toEqual([      'a',      'b1',      'c1',      'c2',      'c3',      'd1',      'd4',      'e3'    ]);  });});