neovim/test/functional/core/path_spec.lua

local helpers = require('test.functional.helpers')(after_each)
local clear = helpers.clear
local eq = helpers.eq
local eval = helpers.eval
local command = helpers.command
local insert = helpers.insert
local feed = helpers.feed
local is_os = helpers.is_os
local mkdir = helpers.mkdir
local rmdir = helpers.rmdir
local write_file = helpers.write_file

local function join_path(...)
  local pathsep = (is_os('win') and '\\' or '/')
  return table.concat({...}, pathsep)
end

describe('path collapse', function()
  local targetdir
  local expected_path

  before_each(function()
    targetdir = join_path('test', 'functional', 'fixtures')
    clear()
    command('edit '..join_path(targetdir, 'tty-test.c'))
    expected_path = eval('expand("%:p")')
  end)

  it('with /./ segment #7117', function()
    command('edit '..join_path(targetdir, '.', 'tty-test.c'))
    eq(expected_path, eval('expand("%:p")'))
  end)

  it('with ./ prefix #7117', function()
    command('edit '..join_path('.', targetdir, 'tty-test.c'))
    eq(expected_path, eval('expand("%:p")'))
  end)

  it('with ./ prefix, after directory change #7117', function()
    command('edit '..join_path('.', targetdir, 'tty-test.c'))
    command('cd test')
    eq(expected_path, eval('expand("%:p")'))
  end)

  it('with /../ segment #7117', function()
    command('edit '..join_path(targetdir, '..', 'fixtures', 'tty-test.c'))
    eq(expected_path, eval('expand("%:p")'))
  end)

  it('with ../ and different starting directory #7117', function()
    command('cd test')
    command('edit '..join_path('..', targetdir, 'tty-test.c'))
    eq(expected_path, eval('expand("%:p")'))
  end)

  it('with ./../ and different starting directory #7117', function()
    command('cd test')
    command('edit '..join_path('.', '..', targetdir, 'tty-test.c'))
    eq(expected_path, eval('expand("%:p")'))
  end)
end)

describe('expand wildcard', function()
  before_each(clear)

  it('with special characters #24421', function()
    local folders = is_os('win') and {
      '{folder}',
      'folder$name'
    } or {
      'folder-name',
      'folder#name'
    }
    for _, folder in ipairs(folders) do
      mkdir(folder)
      local file = join_path(folder, 'file.txt')
      write_file(file, '')
      eq(file, eval('expand("'..folder..'/*")'))
      rmdir(folder)
    end
  end)
end)

describe('file search', function()
  before_each(clear)

  it('find multibyte file name in line #20517', function()
    command('cd test/functional/fixtures')
    insert('filename_with_unicode_ααα')
    eq('', eval('expand("%")'))
    feed('gf')
    eq('filename_with_unicode_ααα', eval('expand("%:t")'))
  end)

  it('matches Windows drive-letter filepaths (without ":" in &isfname)', function()
    local os_win = is_os('win')

    insert([[c:/d:/foo/bar.txt]])
    eq([[c:/d:/foo/bar.txt]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[//share/c:/foo/bar/]])
    eq([[//share/c:/foo/bar/]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[file://c:/foo/bar]])
    eq([[file://c:/foo/bar]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[https://c:/foo/bar]])
    eq([[https://c:/foo/bar]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[\foo\bar]])
    eq(os_win and [[\foo\bar]] or [[bar]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[/foo/bar]])
    eq([[/foo/bar]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[c:\foo\bar]])
    eq(os_win and [[c:\foo\bar]] or [[bar]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[c:/foo/bar]])
    eq([[c:/foo/bar]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[c:foo\bar]])
    eq(os_win and [[foo\bar]] or [[bar]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[c:foo/bar]])
    eq([[foo/bar]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[c:foo]])
    eq([[foo]], eval('expand("<cfile>")'))
    command('%delete')

    -- Examples from: https://learn.microsoft.com/en-us/dotnet/standard/io/file-path-formats#example-ways-to-refer-to-the-same-file
    insert([[c:\temp\test-file.txt]])
    eq(os_win and [[c:\temp\test-file.txt]] or [[test-file.txt]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[\\127.0.0.1\c$\temp\test-file.txt]])
    eq(os_win and [[\\127.0.0.1\c$\temp\test-file.txt]] or [[test-file.txt]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[\\LOCALHOST\c$\temp\test-file.txt]])
    eq(os_win and [[\\LOCALHOST\c$\temp\test-file.txt]] or [[test-file.txt]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[\\.\c:\temp\test-file.txt]]) -- not supported yet
    eq(os_win and [[\\.\c]] or [[test-file.txt]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[\\?\c:\temp\test-file.txt]]) -- not supported yet
    eq(os_win and [[\c]] or [[test-file.txt]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[\\.\UNC\LOCALHOST\c$\temp\test-file.txt]])
    eq(os_win and [[\\.\UNC\LOCALHOST\c$\temp\test-file.txt]] or [[test-file.txt]], eval('expand("<cfile>")'))
    command('%delete')

    insert([[\\127.0.0.1\c$\temp\test-file.txt]])
    eq(os_win and [[\\127.0.0.1\c$\temp\test-file.txt]] or [[test-file.txt]], eval('expand("<cfile>")'))
  end)
end)