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import {  Alias,  Document,  isAlias,  isCollection,  isDocument,  isMap,  isNode,  isPair,  isScalar,  isSeq,  Pair,  parseDocument,  Scalar,  YAMLMap,  YAMLSeq} from 'yaml'
for (const { fn, exp } of [  {    fn: isAlias,    exp: {      doc: false,      scalar: false,      map: false,      seq: false,      alias: true,      pair: false    }  },  {    fn: isCollection,    exp: {      doc: false,      scalar: false,      map: true,      seq: true,      alias: false,      pair: false    }  },  {    fn: isDocument,    exp: {      doc: true,      scalar: false,      map: false,      seq: false,      alias: false,      pair: false    }  },  {    fn: isMap,    exp: {      doc: false,      scalar: false,      map: true,      seq: false,      alias: false,      pair: false    }  },  {    fn: isNode,    exp: {      doc: false,      scalar: true,      map: true,      seq: true,      alias: true,      pair: false    }  },  {    fn: isPair,    exp: {      doc: false,      scalar: false,      map: false,      seq: false,      alias: false,      pair: true    }  },  {    fn: isScalar,    exp: {      doc: false,      scalar: true,      map: false,      seq: false,      alias: false,      pair: false    }  },  {    fn: isSeq,    exp: {      doc: false,      scalar: false,      map: false,      seq: true,      alias: false,      pair: false    }  }]) {  describe(fn.name, () => {    test('parsed doc', () => {      const doc = parseDocument('foo')      expect(fn(doc)).toBe(exp.doc)    })
    test('parsed scalar', () => {      const doc = parseDocument('foo')      expect(fn(doc.contents)).toBe(exp.scalar)    })
    test('parsed map', () => {      const doc = parseDocument('foo: bar')      expect(fn(doc.contents)).toBe(exp.map)    })
    test('parsed seq', () => {      const doc = parseDocument('[foo, bar]')      expect(fn(doc.contents)).toBe(exp.seq)    })
    test('parsed alias', () => {      const doc = parseDocument<YAMLSeq.Parsed>('[ &a foo, *a ]')      expect(fn(doc.contents?.items[1])).toBe(exp.alias)    })
    test('parsed pair', () => {      const doc = parseDocument<YAMLMap.Parsed>('foo: bar')      expect(fn(doc.contents?.items[0])).toBe(exp.pair)    })
    test('created doc', () => {      expect(fn(new Document())).toBe(exp.doc)    })
    test('created scalar', () => {      expect(fn(new Scalar(42))).toBe(exp.scalar)    })
    test('created map', () => {      expect(fn(new YAMLMap())).toBe(exp.map)    })
    test('created seq', () => {      expect(fn(new YAMLSeq())).toBe(exp.seq)    })
    test('created alias', () => {      expect(fn(new Alias(new Scalar(42)))).toBe(exp.alias)    })
    test('created pair', () => {      expect(fn(new Pair(null))).toBe(exp.pair)    })
    test('null', () => {      expect(fn(null)).toBe(false)    })
    test('string', () => {      expect(fn('foo')).toBe(false)    })
    test('object', () => {      expect(fn({ type: 'SCALAR', value: 42 })).toBe(false)    })  })}