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import { isAlias, isScalar, parseDocument, Scalar, visit } from 'yaml'import { source } from './_utils'
describe('doc.clone()', () => {  test('has expected members', () => {    const doc = parseDocument('foo: bar')    const copy = doc.clone()    expect(copy).toMatchObject({      comment: null,      commentBefore: null,      errors: [],      warnings: []    })  })
  test('has expected methods', () => {    const doc = parseDocument('foo: bar')    const copy = doc.clone()    expect(copy.toString()).toBe('foo: bar\n')    expect(copy.toJS()).toEqual({ foo: 'bar' })
    const node = copy.createNode(42)    expect(isScalar(node)).toBe(true)    expect(node).toMatchObject({ value: 42 })
    const alias = copy.createAlias(node as Scalar, 'foo')    expect(isAlias(alias)).toBe(true)    expect(alias).toMatchObject({ source: 'foo' })  })
  test('has separate contents from original', () => {    const doc = parseDocument('foo: bar')    const copy = doc.clone()    copy.set('foo', 'fizz')    expect(doc.get('foo')).toBe('bar')    expect(copy.get('foo')).toBe('fizz')  })
  test('has separate directives from original', () => {    const doc = parseDocument('foo: bar')    const copy = doc.clone()    copy.directives.yaml.explicit = true    expect(copy.toString()).toBe(source`      %YAML 1.2      ---      foo: bar    `)    expect(doc.toString()).toBe('foo: bar\n')  })
  test('handles anchors & aliases', () => {    const src = source`      foo: &foo FOO      bar: *foo    `    const doc = parseDocument(src)    const copy = doc.clone()    expect(copy.toString()).toBe(src)
    visit(doc, {      Alias(_, it) {        if (it.source === 'foo') it.source = 'x'      },      Node(_, it) {        if (it.anchor === 'foo') it.anchor = 'x'      }    })    expect(doc.toString()).toBe(source`      foo: &x FOO      bar: *x    `)    expect(copy.toString()).toBe(src)  })})