import * as child from 'child_process'
import * as io from '../../io/src/io'
import * as os from 'os'
import * as path from 'path'
import {Globber, DefaultGlobber} from '../src/internal-globber'
import {GlobOptions} from '../src/internal-glob-options'
import {promises as fs} from 'fs'

const IS_WINDOWS = process.platform === 'win32'

/**
 * These test focus on the ability of globber to find files
 * and not on the pattern matching aspect
 */
describe('globber', () => {
  beforeAll(async () => {
    await io.rmRF(getTestTemp())
  })

  it('captures cwd', async () => {
    // Create the following layout:
    //   first-cwd
    //   first-cwd/the-correct-file
    //   second-cwd
    //   second-cwd/the-wrong-file
    const root = path.join(getTestTemp(), 'preserves-cwd')
    await fs.mkdir(path.join(root, 'first-cwd'), {recursive: true})
    await fs.writeFile(
      path.join(root, 'first-cwd', 'the-correct-file.txt'),
      'test file content'
    )
    await fs.mkdir(path.join(root, 'second-cwd'), {recursive: true})
    await fs.writeFile(
      path.join(root, 'second-cwd', 'the-wrong-file.txt'),
      'test file content'
    )

    const originalCwd = process.cwd()
    try {
      process.chdir(path.join(root, 'first-cwd'))
      const globber = await DefaultGlobber.create('*')
      process.chdir(path.join(root, 'second-cwd'))
      expect(globber.getSearchPaths()).toEqual([path.join(root, 'first-cwd')])
      const itemPaths = await globber.glob()
      expect(itemPaths).toEqual([
        path.join(root, 'first-cwd', 'the-correct-file.txt')
      ])
    } finally {
      process.chdir(originalCwd)
    }
  })

  it('defaults to followSymbolicLinks=true', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/folder-a
    //   <root>/folder-a/file
    //   <root>/symDir -> <root>/folder-a
    const root = path.join(
      getTestTemp(),
      'defaults-to-follow-symbolic-links-true'
    )
    await fs.mkdir(path.join(root, 'folder-a'), {recursive: true})
    await fs.writeFile(path.join(root, 'folder-a', 'file'), 'test file content')
    await createSymlinkDir(
      path.join(root, 'folder-a'),
      path.join(root, 'symDir')
    )

    const itemPaths = await glob(root, {})
    expect(itemPaths).toEqual([
      root,
      path.join(root, 'folder-a'),
      path.join(root, 'folder-a', 'file'),
      path.join(root, 'symDir'),
      path.join(root, 'symDir', 'file')
    ])
  })

  it('defaults to implicitDescendants=true', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/folder-a
    //   <root>/folder-a/file
    const root = path.join(
      getTestTemp(),
      'defaults-to-implicit-descendants-true'
    )
    await fs.mkdir(path.join(root, 'folder-a'), {recursive: true})
    await fs.writeFile(path.join(root, 'folder-a', 'file'), 'test file content')

    const itemPaths = await glob(root, {})
    expect(itemPaths).toEqual([
      root,
      path.join(root, 'folder-a'),
      path.join(root, 'folder-a', 'file')
    ])
  })

  it('defaults to omitBrokenSymbolicLinks=true', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/folder-a
    //   <root>/folder-a/file
    //   <root>/symDir -> <root>/no-such
    const root = path.join(
      getTestTemp(),
      'defaults-to-omit-broken-symbolic-links-true'
    )
    await fs.mkdir(path.join(root, 'folder-a'), {recursive: true})
    await fs.writeFile(path.join(root, 'folder-a', 'file'), 'test file content')
    await createSymlinkDir(
      path.join(root, 'no-such'),
      path.join(root, 'symDir')
    )

    const itemPaths = await glob(root, {})
    expect(itemPaths).toEqual([
      root,
      path.join(root, 'folder-a'),
      path.join(root, 'folder-a', 'file')
    ])
  })

  it('detects cycle when followSymbolicLinks=true', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/file
    //   <root>/symDir -> <root>
    const root = path.join(getTestTemp(), 'detects-cycle-when-follow-true')
    await fs.mkdir(root, {recursive: true})
    await fs.writeFile(path.join(root, 'file'), 'test file content')
    await createSymlinkDir(root, path.join(root, 'symDir'))

    const itemPaths = await glob(root, {followSymbolicLinks: true})
    expect(itemPaths).toEqual([root, path.join(root, 'file')])
    // todo: ? expect(itemPaths[2]).toBe(path.join(root, 'symDir'))
  })

  it('detects deep cycle starting from middle when followSymbolicLinks=true', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/file-under-root
    //   <root>/folder-a
    //   <root>/folder-a/file-under-a
    //   <root>/folder-a/folder-b
    //   <root>/folder-a/folder-b/file-under-b
    //   <root>/folder-a/folder-b/folder-c
    //   <root>/folder-a/folder-b/folder-c/file-under-c
    //   <root>/folder-a/folder-b/folder-c/sym-folder -> <root>
    const root = path.join(
      getTestTemp(),
      'detects-deep-cycle-starting-from-middle-when-follow-true'
    )
    await fs.mkdir(path.join(root, 'folder-a', 'folder-b', 'folder-c'), {
      recursive: true
    })
    await fs.writeFile(
      path.join(root, 'file-under-root'),
      'test file under root contents'
    )
    await fs.writeFile(
      path.join(root, 'folder-a', 'file-under-a'),
      'test file under a contents'
    )
    await fs.writeFile(
      path.join(root, 'folder-a', 'folder-b', 'file-under-b'),
      'test file under b contents'
    )
    await fs.writeFile(
      path.join(root, 'folder-a', 'folder-b', 'folder-c', 'file-under-c'),
      'test file under c contents'
    )
    await createSymlinkDir(
      root,
      path.join(root, 'folder-a', 'folder-b', 'folder-c', 'sym-folder')
    )
    await fs.stat(
      path.join(
        root,
        'folder-a',
        'folder-b',
        'folder-c',
        'sym-folder',
        'file-under-root'
      )
    )

    const itemPaths = await glob(path.join(root, 'folder-a', 'folder-b'), {
      followSymbolicLinks: true
    })
    expect(itemPaths).toEqual([
      path.join(root, 'folder-a', 'folder-b'),
      path.join(root, 'folder-a', 'folder-b', 'file-under-b'),
      path.join(root, 'folder-a', 'folder-b', 'folder-c'),
      path.join(root, 'folder-a', 'folder-b', 'folder-c', 'file-under-c'),
      path.join(root, 'folder-a', 'folder-b', 'folder-c', 'sym-folder'),
      path.join(
        root,
        'folder-a',
        'folder-b',
        'folder-c',
        'sym-folder',
        'file-under-root'
      ),
      path.join(
        root,
        'folder-a',
        'folder-b',
        'folder-c',
        'sym-folder',
        'folder-a'
      ),
      path.join(
        root,
        'folder-a',
        'folder-b',
        'folder-c',
        'sym-folder',
        'folder-a',
        'file-under-a'
      )
    ])
  })

  it('detects cycle starting from symlink when followSymbolicLinks=true', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/file
    //   <root>/symDir -> <root>
    const root: string = path.join(
      getTestTemp(),
      'detects-cycle-starting-from-symlink-when-follow-true'
    )
    await fs.mkdir(root, {recursive: true})
    await fs.writeFile(path.join(root, 'file'), 'test file content')
    await createSymlinkDir(root, path.join(root, 'symDir'))
    await fs.stat(path.join(root, 'symDir'))

    const itemPaths = await glob(path.join(root, 'symDir'), {
      followSymbolicLinks: true
    })
    expect(itemPaths).toEqual([
      path.join(root, 'symDir'),
      path.join(root, 'symDir', 'file')
    ])
    // todo: ? expect(itemPaths[2]).toBe(path.join(root, 'symDir', 'symDir'));
  })

  it('does not follow symlink when followSymbolicLinks=false', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/realDir
    //   <root>/realDir/file
    //   <root>/symDir -> <root>/realDir
    const root = path.join(
      getTestTemp(),
      'does-not-follow-symlink-when-follow-false'
    )
    await fs.mkdir(path.join(root, 'realDir'), {recursive: true})
    await fs.writeFile(path.join(root, 'realDir', 'file'), 'test file content')
    await createSymlinkDir(
      path.join(root, 'realDir'),
      path.join(root, 'symDir')
    )

    const itemPaths = await glob(root, {followSymbolicLinks: false})
    expect(itemPaths).toEqual([
      root,
      path.join(root, 'realDir'),
      path.join(root, 'realDir', 'file'),
      path.join(root, 'symDir')
    ])
  })

  it('does not follow symlink when search path is symlink and followSymbolicLinks=false', async () => {
    // Create the following layout:
    //   realDir
    //   realDir/file
    //   symDir -> realDir
    const root = path.join(
      getTestTemp(),
      'does-not-follow-symlink-when-search-path-is-symlink-and-follow-false'
    )
    await fs.mkdir(path.join(root, 'realDir'), {recursive: true})
    await fs.writeFile(path.join(root, 'realDir', 'file'), 'test file content')
    await createSymlinkDir(
      path.join(root, 'realDir'),
      path.join(root, 'symDir')
    )

    const itemPaths = await glob(path.join(root, 'symDir'), {
      followSymbolicLinks: false
    })
    expect(itemPaths).toEqual([path.join(root, 'symDir')])
  })

  it('does not return broken symlink when follow-true and omit-true', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/brokenSym -> <root>/noSuch
    //   <root>/realDir
    //   <root>/realDir/file
    //   <root>/symDir -> <root>/realDir
    const root = path.join(
      getTestTemp(),
      'does-not-return-broken-symlink-when-follow-true-and-omit-true'
    )
    await fs.mkdir(root, {recursive: true})
    await createSymlinkDir(
      path.join(root, 'noSuch'),
      path.join(root, 'brokenSym')
    )
    await fs.mkdir(path.join(root, 'realDir'), {recursive: true})
    await fs.writeFile(path.join(root, 'realDir', 'file'), 'test file content')
    await createSymlinkDir(
      path.join(root, 'realDir'),
      path.join(root, 'symDir')
    )

    const itemPaths = await glob(root, {followSymbolicLinks: true})
    expect(itemPaths).toEqual([
      root,
      path.join(root, 'realDir'),
      path.join(root, 'realDir', 'file'),
      path.join(root, 'symDir'),
      path.join(root, 'symDir', 'file')
    ])
  })

  it('does not return broken symlink when search path is broken symlink and followSymbolicLinks=true', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/brokenSym -> <root>/noSuch
    const root = path.join(
      getTestTemp(),
      'does-not-return-broken-symlink-when-search-path-is-broken-symlink-and-follow-true'
    )
    await fs.mkdir(root, {recursive: true})
    const brokenSymPath = path.join(root, 'brokenSym')
    await createSymlinkDir(path.join(root, 'noSuch'), brokenSymPath)
    await fs.lstat(brokenSymPath)

    const itemPaths = await glob(brokenSymPath, {followSymbolicLinks: true})
    expect(itemPaths).toEqual([])
  })

  it('does not search paths that are not partial matches', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/realDir
    //   <root>/realDir/nested
    //   <root>/realDir/nested/file
    //   <root>/realDir2
    //   <root>/realDir2/nested2
    //   <root>/realDir2/nested2/symDir -> <root>/noSuch
    const root = path.join(
      getTestTemp(),
      'does-not-search-paths-that-are-not-partial-matches'
    )
    await fs.mkdir(path.join(root, 'realDir', 'nested'), {recursive: true})
    await fs.writeFile(
      path.join(root, 'realDir', 'nested', 'file'),
      'test file content'
    )
    await fs.mkdir(path.join(root, 'realDir2', 'nested2'), {recursive: true})
    await createSymlinkDir(
      path.join(root, 'noSuch'),
      path.join(root, 'realDir2', 'nested2', 'symDir')
    )

    const options: GlobOptions = {
      followSymbolicLinks: true,
      omitBrokenSymbolicLinks: false
    }

    // Should throw
    try {
      await glob(`${root}/*Dir*/*nested*/*`, options)
      throw new Error('should not reach here')
    } catch (err) {
      expect(err.message).toMatch(/broken symbolic link/i)
    }

    // Not partial match
    let itemPaths = await glob(`${root}/*Dir/*nested*/*`, options)
    expect(itemPaths).toEqual([path.join(root, 'realDir', 'nested', 'file')])

    // Not partial match
    itemPaths = await glob(`${root}/*Dir*/*nested/*`, options)
    expect(itemPaths).toEqual([path.join(root, 'realDir', 'nested', 'file')])
  })

  it('does not throw for broken symlinks that are not matches or partial matches when followSymbolicLinks=true and omitBrokenSymbolicLinks=false', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/realDir
    //   <root>/realDir/file
    //   <root>/symDir -> <root>/noSuch
    const root = path.join(
      getTestTemp(),
      'does-not-throw-for-broken-symlinks-that-are-not-matches-or-partial-matches-when-follow-true-and-omit-false'
    )
    await fs.mkdir(path.join(root, 'realDir'), {recursive: true})
    await fs.writeFile(path.join(root, 'realDir', 'file'), 'test file content')
    await createSymlinkDir(path.join(root, 'noSuch'), path.join(root, 'symDir'))

    const options: GlobOptions = {
      followSymbolicLinks: true,
      omitBrokenSymbolicLinks: false
    }

    // Match should throw
    try {
      await glob(`${root}/*`, options)
      throw new Error('should not reach here')
    } catch (err) {
      expect(err.message).toMatch(/broken symbolic link/i)
    }

    // Partial match should throw
    try {
      await glob(`${root}/*/*`, options)
      throw new Error('should not reach here')
    } catch (err) {
      expect(err.message).toMatch(/broken symbolic link/i)
    }

    // Not match or partial match
    const itemPaths = await glob(`${root}/*eal*/*`, options)
    expect(itemPaths).toEqual([path.join(root, 'realDir', 'file')])
  })

  it('follows symlink when follow-symbolic-links=true', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/realDir
    //   <root>/realDir/file
    //   <root>/symDir -> <root>/realDir
    const root = path.join(getTestTemp(), 'follows-symlink')
    await fs.mkdir(path.join(root, 'realDir'), {recursive: true})
    await fs.writeFile(path.join(root, 'realDir', 'file'), 'test file content')
    await createSymlinkDir(
      path.join(root, 'realDir'),
      path.join(root, 'symDir')
    )

    const itemPaths = await glob(root, {followSymbolicLinks: true})
    expect(itemPaths).toEqual([
      root,
      path.join(root, 'realDir'),
      path.join(root, 'realDir', 'file'),
      path.join(root, 'symDir'),
      path.join(root, 'symDir', 'file')
    ])
  })

  it('follows symlink when search path is symlink and follow-symbolic-links=true', async () => {
    // Create the following layout:
    //   realDir
    //   realDir/file
    //   symDir -> realDir
    const root = path.join(
      getTestTemp(),
      'follows-symlink-when-search-path-is-symlink-and-follow-true'
    )
    await fs.mkdir(path.join(root, 'realDir'), {recursive: true})
    await fs.writeFile(path.join(root, 'realDir', 'file'), 'test file content')
    await createSymlinkDir(
      path.join(root, 'realDir'),
      path.join(root, 'symDir')
    )

    const itemPaths = await glob(path.join(root, 'symDir'), {
      followSymbolicLinks: true
    })
    expect(itemPaths).toEqual([
      path.join(root, 'symDir'),
      path.join(root, 'symDir', 'file')
    ])
  })

  it('returns broken symlink when followSymbolicLinks=false', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/brokenSym -> <root>/noSuch
    //   <root>/realDir
    //   <root>/realDir/file
    //   <root>/symDir -> <root>/realDir
    const root = path.join(
      getTestTemp(),
      'returns-broken-symlink-when-follow-false'
    )
    await fs.mkdir(root, {recursive: true})
    await createSymlinkDir(
      path.join(root, 'noSuch'),
      path.join(root, 'brokenSym')
    )
    await fs.mkdir(path.join(root, 'realDir'), {recursive: true})
    await fs.writeFile(path.join(root, 'realDir', 'file'), 'test file content')
    await createSymlinkDir(
      path.join(root, 'realDir'),
      path.join(root, 'symDir')
    )

    const itemPaths = await glob(root, {followSymbolicLinks: false})
    expect(itemPaths).toEqual([
      root,
      path.join(root, 'brokenSym'),
      path.join(root, 'realDir'),
      path.join(root, 'realDir', 'file'),
      path.join(root, 'symDir')
    ])
  })

  it('returns broken symlink when search path is broken symlink and followSymbolicLinks=false', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/brokenSym -> <root>/noSuch
    const root = path.join(
      getTestTemp(),
      'returns-broken-symlink-when-search-path-is-broken-symlink-and-follow-false'
    )
    await fs.mkdir(root, {recursive: true})
    const brokenSymPath = path.join(root, 'brokenSym')
    await createSymlinkDir(path.join(root, 'noSuch'), brokenSymPath)

    const itemPaths = await glob(brokenSymPath, {followSymbolicLinks: false})
    expect(itemPaths).toEqual([brokenSymPath])
  })

  it('returns depth first', async () => {
    // Create the following layout:
    //   <root>/a-file
    //   <root>/b-folder
    //   <root>/b-folder/a-file
    //   <root>/b-folder/b-folder
    //   <root>/b-folder/b-folder/file
    //   <root>/b-folder/c-file
    //   <root>/c-file
    const root = path.join(getTestTemp(), 'returns-depth-first')
    await fs.mkdir(path.join(root, 'b-folder', 'b-folder'), {recursive: true})
    await fs.writeFile(path.join(root, 'a-file'), 'test a-file content')
    await fs.writeFile(
      path.join(root, 'b-folder', 'a-file'),
      'test b-folder/a-file content'
    )
    await fs.writeFile(
      path.join(root, 'b-folder', 'b-folder', 'file'),
      'test b-folder/b-folder/file content'
    )
    await fs.writeFile(
      path.join(root, 'b-folder', 'c-file'),
      'test b-folder/c-file content'
    )
    await fs.writeFile(path.join(root, 'c-file'), 'test c-file content')

    const itemPaths = await glob(root)
    expect(itemPaths).toEqual([
      root,
      path.join(root, 'a-file'),
      path.join(root, 'b-folder'),
      path.join(root, 'b-folder', 'a-file'),
      path.join(root, 'b-folder', 'b-folder'),
      path.join(root, 'b-folder', 'b-folder', 'file'),
      path.join(root, 'b-folder', 'c-file'),
      path.join(root, 'c-file')
    ])
  })

  it('returns descendants', async () => {
    // Create the following layout:
    //   <root>/file-1
    //   <root>/dir-1
    //   <root>/dir-1/file-2
    //   <root>/dir-1/dir-2
    //   <root>/dir-1/dir-2/file-3
    const root = path.join(getTestTemp(), 'returns-descendants')
    await fs.mkdir(path.join(root, 'dir-1', 'dir-2'), {recursive: true})
    await fs.writeFile(path.join(root, 'file-1'), '')
    await fs.writeFile(path.join(root, 'dir-1', 'file-2'), '')
    await fs.writeFile(path.join(root, 'dir-1', 'dir-2', 'file-3'), '')

    // When pattern ends with `/**/`
    let pattern = `${root}${path.sep}**${path.sep}`
    expect(
      await glob(pattern, {
        implicitDescendants: false
      })
    ).toHaveLength(3) // sanity check
    expect(await glob(pattern)).toEqual([
      root,
      path.join(root, 'dir-1'),
      path.join(root, 'dir-1', 'dir-2'),
      path.join(root, 'dir-1', 'dir-2', 'file-3'),
      path.join(root, 'dir-1', 'file-2'),
      path.join(root, 'file-1')
    ])

    // When pattern ends with something other than `/**/`
    pattern = `${root}${path.sep}**${path.sep}dir-?`
    expect(
      await glob(pattern, {
        implicitDescendants: false
      })
    ).toHaveLength(2) // sanity check
    expect(await glob(pattern)).toEqual([
      path.join(root, 'dir-1'),
      path.join(root, 'dir-1', 'dir-2'),
      path.join(root, 'dir-1', 'dir-2', 'file-3'),
      path.join(root, 'dir-1', 'file-2')
    ])
  })

  it('returns directories only when trailing slash and implicit descendants false', async () => {
    // Create the following layout:
    //   <root>/file-1
    //   <root>/dir-1
    //   <root>/dir-1/file-2
    //   <root>/dir-1/dir-2
    //   <root>/dir-1/dir-2/file-3
    const root = path.join(
      getTestTemp(),
      'returns-directories-only-when-trailing-slash-and-implicit-descendants-false'
    )
    await fs.mkdir(path.join(root, 'dir-1', 'dir-2'), {recursive: true})
    await fs.writeFile(path.join(root, 'file-1'), '')
    await fs.writeFile(path.join(root, 'dir-1', 'file-2'), '')
    await fs.writeFile(path.join(root, 'dir-1', 'dir-2', 'file-3'), '')

    const pattern = `${root}${path.sep}**${path.sep}`
    expect(await glob(pattern)).toHaveLength(6) // sanity check
    expect(
      await glob(pattern, {
        implicitDescendants: false
      })
    ).toEqual([
      root,
      path.join(root, 'dir-1'),
      path.join(root, 'dir-1', 'dir-2')
    ])
  })

  it('returns empty when search path does not exist', async () => {
    const itemPaths = await glob(path.join(getTestTemp(), 'nosuch'))
    expect(itemPaths).toEqual([])
  })

  it('returns hidden files', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/.emptyFolder
    //   <root>/.file
    //   <root>/.folder
    //   <root>/.folder/file
    const root = path.join(getTestTemp(), 'returns-hidden-files')
    await createHiddenDirectory(path.join(root, '.emptyFolder'))
    await createHiddenDirectory(path.join(root, '.folder'))
    await createHiddenFile(path.join(root, '.file'), 'test .file content')
    await fs.writeFile(
      path.join(root, '.folder', 'file'),
      'test .folder/file content'
    )

    const itemPaths = await glob(root)
    expect(itemPaths).toEqual([
      root,
      path.join(root, '.emptyFolder'),
      path.join(root, '.file'),
      path.join(root, '.folder'),
      path.join(root, '.folder', 'file')
    ])
  })

  it('returns normalized paths', async () => {
    // Create the following layout:
    //   <root>/hello/world.txt
    const root: string = path.join(getTestTemp(), 'returns-normalized-paths')
    await fs.mkdir(path.join(root, 'hello'), {recursive: true})
    await fs.writeFile(path.join(root, 'hello', 'world.txt'), '')

    const itemPaths = await glob(
      `${root}${path.sep}${path.sep}${path.sep}hello`
    )
    expect(itemPaths).toEqual([
      path.join(root, 'hello'),
      path.join(root, 'hello', 'world.txt')
    ])
  })

  it('skips comments', async () => {
    const searchPaths = await getSearchPaths(
      `#aaa/*${os.EOL}/foo/*${os.EOL}#bbb/*${os.EOL}/bar/*`
    )
    const drive = IS_WINDOWS ? process.cwd().substr(0, 2) : ''
    expect(searchPaths).toEqual([
      IS_WINDOWS ? `${drive}\\foo` : '/foo',
      IS_WINDOWS ? `${drive}\\bar` : '/bar'
    ])
  })

  it('skips empty lines', async () => {
    const searchPaths = await getSearchPaths(
      `${os.EOL}${os.EOL}/foo/*${os.EOL}${os.EOL}/bar/*${os.EOL}/baz/**${os.EOL}`
    )
    const drive = IS_WINDOWS ? process.cwd().substr(0, 2) : ''
    expect(searchPaths).toEqual([
      IS_WINDOWS ? `${drive}\\foo` : '/foo',
      IS_WINDOWS ? `${drive}\\bar` : '/bar',
      IS_WINDOWS ? `${drive}\\baz` : '/baz'
    ])
  })

  it('throws when match broken symlink and followSymbolicLinks=true and omitBrokenSymbolicLinks=false', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/brokenSym -> <root>/noSuch
    const root = path.join(
      getTestTemp(),
      'throws-when-match-broken-symlink-and-follow-true-and-omit-false'
    )
    await fs.mkdir(root, {recursive: true})
    await createSymlinkDir(
      path.join(root, 'noSuch'),
      path.join(root, 'brokenSym')
    )

    try {
      await glob(root, {
        followSymbolicLinks: true,
        omitBrokenSymbolicLinks: false
      })
      throw new Error('Expected tl.find to throw')
    } catch (err) {
      expect(err.message).toMatch(/broken symbolic link/)
    }
  })

  it('throws when search path is broken symlink and followSymbolicLinks=true and omitBrokenSymbolicLinks=false', async () => {
    // Create the following layout:
    //   <root>
    //   <root>/brokenSym -> <root>/noSuch
    const root = path.join(
      getTestTemp(),
      'throws-when-search-path-is-broken-symlink-and-follow-true-and-omit-false'
    )
    await fs.mkdir(root, {recursive: true})
    const brokenSymPath = path.join(root, 'brokenSym')
    await createSymlinkDir(path.join(root, 'noSuch'), brokenSymPath)
    await fs.lstat(brokenSymPath)

    try {
      await glob(brokenSymPath, {
        followSymbolicLinks: true,
        omitBrokenSymbolicLinks: false
      })
      throw new Error('Expected tl.find to throw')
    } catch (err) {
      expect(err.message).toMatch(/broken symbolic link/)
    }
  })
})

async function createHiddenDirectory(dir: string): Promise<void> {
  if (!path.basename(dir).match(/^\./)) {
    throw new Error(`Expected dir '${dir}' to start with '.'.`)
  }

  await fs.mkdir(dir, {recursive: true})
  if (IS_WINDOWS) {
    const result = child.spawnSync('attrib.exe', ['+H', dir])
    if (result.status !== 0) {
      const message: string = (result.output || []).join(' ').trim()
      throw new Error(
        `Failed to set hidden attribute for directory '${dir}'. ${message}`
      )
    }
  }
}

async function createHiddenFile(file: string, content: string): Promise<void> {
  if (!path.basename(file).match(/^\./)) {
    throw new Error(`Expected dir '${file}' to start with '.'.`)
  }

  await fs.mkdir(path.dirname(file), {recursive: true})
  await fs.writeFile(file, content)

  if (IS_WINDOWS) {
    const result = child.spawnSync('attrib.exe', ['+H', file])
    if (result.status !== 0) {
      const message: string = (result.output || []).join(' ').trim()
      throw new Error(
        `Failed to set hidden attribute for file '${file}'. ${message}`
      )
    }
  }
}

function getTestTemp(): string {
  return path.join(__dirname, '_temp', 'glob')
}

/**
 * Creates a symlink directory on OSX/Linux, and a junction point directory on Windows.
 * A symlink directory is not created on Windows since it requires an elevated context.
 */
async function createSymlinkDir(real: string, link: string): Promise<void> {
  if (IS_WINDOWS) {
    await fs.symlink(real, link, 'junction')
  } else {
    await fs.symlink(real, link)
  }
}

async function getSearchPaths(patterns: string): Promise<string[]> {
  const globber: Globber = await DefaultGlobber.create(patterns)
  return globber.getSearchPaths()
}

async function glob(
  patterns: string,
  options?: GlobOptions
): Promise<string[]> {
  const globber: Globber = await DefaultGlobber.create(patterns, options)
  return await globber.glob()
}