Merge #35109 vim.pos, vim.range

runtime/doc/lua.txt

@@ -3949,6 +3949,205 @@ vim.net.request({url}, {opts}, {on_response})              *vim.net.request()*
                        success.
 
 
+==============================================================================
+Lua module: vim.pos                                                  *vim.pos*
+
+WARNING: This module is under experimental support. Its semantics are not yet
+finalized, and the stability of this API is not guaranteed. Avoid using it
+outside of Nvim. You may subscribe to or participate in the tracking issue
+https://github.com/neovim/neovim/issues/25509 to stay updated or contribute to
+its development.
+
+Built on |vim.Pos| objects, this module offers operations that support
+comparisons and conversions between various types of positions.
+
+
+*vim.Pos*
+    Represents a well-defined position.
+
+    A |vim.Pos| object contains the {row} and {col} coordinates of a position.
+    To create a new |vim.Pos| object, call `vim.pos()`.
+
+    Example: >lua
+        local pos1 = vim.pos(3, 5)
+        local pos2 = vim.pos(4, 0)
+
+        -- Operators are overloaded for comparing two `vim.Pos` objects.
+        if pos1 < pos2 then
+          print("pos1 comes before pos2")
+        end
+
+        if pos1 ~= pos2 then
+          print("pos1 and pos2 are different positions")
+        end
+<
+
+    It may include optional fields that enable additional capabilities, such
+    as format conversions.
+
+    Fields: ~
+      • {row}     (`integer`) 0-based byte index.
+      • {col}     (`integer`) 0-based byte index.
+      • {buf}?    (`integer`) Optional buffer handle.
+
+                  When specified, it indicates that this position belongs to a
+                  specific buffer. This field is required when performing
+                  position conversions.
+      • {to_lsp}  (`fun(pos: vim.Pos, position_encoding: lsp.PositionEncodingKind)`)
+                  See |Pos:to_lsp()|.
+      • {lsp}     (`fun(buf: integer, pos: lsp.Position, position_encoding: lsp.PositionEncodingKind)`)
+                  See |Pos:lsp()|.
+
+
+Pos:lsp({buf}, {pos}, {position_encoding})                         *Pos:lsp()*
+    Creates a new |vim.Pos| from `lsp.Position`.
+
+    Example: >lua
+        local buf = vim.api.nvim_get_current_buf()
+        local lsp_pos = {
+          line = 3,
+          character = 5
+        }
+
+        -- `buf` is mandatory, as LSP positions are always associated with a buffer.
+        local pos = vim.pos.lsp(buf, lsp_pos, 'utf-16')
+<
+
+    Parameters: ~
+      • {buf}                (`integer`)
+      • {pos}                (`lsp.Position`)
+      • {position_encoding}  (`lsp.PositionEncodingKind`)
+
+Pos:to_lsp({pos}, {position_encoding})                          *Pos:to_lsp()*
+    Converts |vim.Pos| to `lsp.Position`.
+
+    Example: >lua
+        -- `buf` is required for conversion to LSP position.
+        local buf = vim.api.nvim_get_current_buf()
+        local pos = vim.pos(3, 5, { buf = buf })
+
+        -- Convert to LSP position, you can call it in a method style.
+        local lsp_pos = pos:lsp('utf-16')
+<
+
+    Parameters: ~
+      • {pos}                (`vim.Pos`) See |vim.Pos|.
+      • {position_encoding}  (`lsp.PositionEncodingKind`)
+
+
+==============================================================================
+Lua module: vim.range                                              *vim.range*
+
+WARNING: This module is under experimental support. Its semantics are not yet
+finalized, and the stability of this API is not guaranteed. Avoid using it
+outside of Nvim. You may subscribe to or participate in the tracking issue
+https://github.com/neovim/neovim/issues/25509 to stay updated or contribute to
+its development.
+
+Built on |vim.Range| objects, this module offers operations that support
+comparisons as well as containment checks (for positions and for other
+ranges). conversions between various types of ranges is also provided.
+
+
+*vim.Range*
+    Represents a well-defined range.
+
+    A |vim.Range| object contains a {start} and a {end_} position(see
+    |vim.Pos|). Note that the {end_} position is exclusive. To create a new
+    |vim.Range| object, call `vim.range()`.
+
+    Example: >lua
+        local pos1 = vim.pos(3, 5)
+        local pos2 = vim.pos(4, 0)
+
+        -- Create a range from two positions.
+        local range1 = vim.range(pos1, pos2)
+        -- Or createa range from four integers representing start and end positions.
+        local range2 = vim.range(3, 5, 4, 0)
+
+        -- Because `vim.Range` is end exclusive, `range1` and `range2` both represent
+        -- a range starting at the row 3, column 5 and ending at where the row 3 ends.
+
+        -- Operators are overloaded for comparing two `vim.Pos` objects.
+        if range1 == range2 then
+          print("range1 and range2 are the same range")
+        end
+<
+
+    It may include optional fields that enable additional capabilities, such
+    as format conversions. Note that the {start} and {end_} positions need to
+    have the same optional fields.
+
+    Fields: ~
+      • {start}      (`vim.Pos`) Start position.
+      • {end_}       (`vim.Pos`) End position, exclusive.
+      • {has}        (`fun(outer: vim.Range, inner: vim.Range): boolean`) See
+                     |Range:has()|.
+      • {intersect}  (`fun(r1: vim.Range, r2: vim.Range): vim.Range?`) See
+                     |Range:intersect()|.
+      • {to_lsp}     (`fun(range: vim.Range, position_encoding: lsp.PositionEncodingKind)`)
+                     See |Range:to_lsp()|.
+      • {lsp}        (`fun(buf: integer, range: lsp.Range, position_encoding: lsp.PositionEncodingKind)`)
+                     See |Range:lsp()|.
+
+
+Range:has({outer}, {inner})                                      *Range:has()*
+    Checks whether {outer} range contains {inner} range.
+
+    Parameters: ~
+      • {outer}  (`vim.Range`) See |vim.Range|.
+      • {inner}  (`vim.Range`) See |vim.Range|.
+
+    Return: ~
+        (`boolean`) `true` if {outer} range fully contains {inner} range.
+
+Range:intersect({r1}, {r2})                                *Range:intersect()*
+    Computes the common range shared by the given ranges.
+
+    Parameters: ~
+      • {r1}  (`vim.Range`) First range to intersect. See |vim.Range|.
+      • {r2}  (`vim.Range`) Second range to intersect. See |vim.Range|.
+
+    Return: ~
+        (`vim.Range?`) range that is present inside both `r1` and `r2`. `nil`
+        if such range does not exist. See |vim.Range|.
+
+Range:lsp({buf}, {range}, {position_encoding})                   *Range:lsp()*
+    Creates a new |vim.Range| from `lsp.Range`.
+
+    Example: >lua
+        local buf = vim.api.nvim_get_current_buf()
+        local lsp_range = {
+          ['start'] = { line = 3, character = 5 },
+          ['end'] = { line = 4, character = 0 }
+        }
+
+        -- `buf` is mandatory, as LSP ranges are always associated with a buffer.
+        local range = vim.range.lsp(buf, lsp_range, 'utf-16')
+<
+
+    Parameters: ~
+      • {buf}                (`integer`)
+      • {range}              (`lsp.Range`)
+      • {position_encoding}  (`lsp.PositionEncodingKind`)
+
+Range:to_lsp({range}, {position_encoding})                    *Range:to_lsp()*
+    Converts |vim.Range| to `lsp.Range`.
+
+    Example: >lua
+        -- `buf` is required for conversion to LSP range.
+        local buf = vim.api.nvim_get_current_buf()
+        local range = vim.range(3, 5, 4, 0, { buf = buf })
+
+        -- Convert to LSP range, you can call it in a method style.
+        local lsp_range = range:to_lsp('utf-16')
+<
+
+    Parameters: ~
+      • {range}              (`vim.Range`) See |vim.Range|.
+      • {position_encoding}  (`lsp.PositionEncodingKind`)
+
+
 ==============================================================================
 Lua module: vim.re                                                    *vim.re*
 

runtime/doc/news.txt

@@ -241,6 +241,7 @@ LUA
 • Built-in plugin manager |vim.pack|
 • |vim.list.unique()| to deduplicate lists.
 • |vim.list.bisect()| for binary search.
+• Experimental `vim.pos` and `vim.range` for Position/Range abstraction.
 
 OPTIONS
 

runtime/lua/vim/_editor.lua

@@ -42,6 +42,8 @@ for k, v in pairs({
   pack = true,
   _watch = true,
   net = true,
+  pos = true,
+  range = true,
 }) do
   vim._submodules[k] = v
 end

runtime/lua/vim/_meta.lua

@@ -21,6 +21,8 @@ vim.keymap = require('vim.keymap')
 vim.loader = require('vim.loader')
 vim.lsp = require('vim.lsp')
 vim.pack = require('vim.pack')
+vim.pos = require('vim.pos')
+vim.range = require('vim.range')
 vim.re = require('vim.re')
 vim.secure = require('vim.secure')
 vim.snippet = require('vim.snippet')

runtime/lua/vim/pos.lua

@@ -0,0 +1,189 @@
+---@brief
+---
+--- WARNING: This module is under experimental support.
+--- Its semantics are not yet finalized,
+--- and the stability of this API is not guaranteed.
+--- Avoid using it outside of Nvim.
+--- You may subscribe to or participate in the tracking issue
+--- https://github.com/neovim/neovim/issues/25509
+--- to stay updated or contribute to its development.
+---
+--- Built on |vim.Pos| objects, this module offers operations
+--- that support comparisons and conversions between various types of positions.
+
+local api = vim.api
+local validate = vim.validate
+
+--- Represents a well-defined position.
+---
+--- A |vim.Pos| object contains the {row} and {col} coordinates of a position.
+--- To create a new |vim.Pos| object, call `vim.pos()`.
+---
+--- Example:
+--- ```lua
+--- local pos1 = vim.pos(3, 5)
+--- local pos2 = vim.pos(4, 0)
+---
+--- -- Operators are overloaded for comparing two `vim.Pos` objects.
+--- if pos1 < pos2 then
+---   print("pos1 comes before pos2")
+--- end
+---
+--- if pos1 ~= pos2 then
+---   print("pos1 and pos2 are different positions")
+--- end
+--- ```
+---
+--- It may include optional fields that enable additional capabilities,
+--- such as format conversions.
+---
+---@class vim.Pos
+---@field row integer 0-based byte index.
+---@field col integer 0-based byte index.
+---
+--- Optional buffer handle.
+---
+--- When specified, it indicates that this position belongs to a specific buffer.
+--- This field is required when performing position conversions.
+---@field buf? integer
+local Pos = {}
+Pos.__index = Pos
+
+---@class vim.Pos.Optional
+---@inlinedoc
+---@field buf? integer
+
+---@package
+---@param row integer
+---@param col integer
+---@param opts vim.Pos.Optional
+function Pos.new(row, col, opts)
+  validate('row', row, 'number')
+  validate('col', col, 'number')
+  validate('opts', opts, 'table', true)
+
+  opts = opts or {}
+
+  ---@type vim.Pos
+  local self = setmetatable({
+    row = row,
+    col = col,
+    buf = opts.buf,
+  }, Pos)
+
+  return self
+end
+
+---@param p1 vim.Pos First position to compare.
+---@param p2 vim.Pos Second position to compare.
+---@return integer
+--- 1: a > b
+--- 0: a == b
+--- -1: a < b
+local function cmp_pos(p1, p2)
+  if p1.row == p2.row then
+    if p1.col > p2.col then
+      return 1
+    elseif p1.col < p2.col then
+      return -1
+    else
+      return 0
+    end
+  elseif p1.row > p2.row then
+    return 1
+  end
+
+  return -1
+end
+
+---@private
+function Pos.__lt(...)
+  return cmp_pos(...) == -1
+end
+
+---@private
+function Pos.__le(...)
+  return cmp_pos(...) ~= 1
+end
+
+---@private
+function Pos.__eq(...)
+  return cmp_pos(...) == 0
+end
+
+--- TODO(ofseed): Make it work for unloaded buffers. Check get_line() in vim.lsp.util.
+---@param buf integer
+---@param row integer
+local function get_line(buf, row)
+  return api.nvim_buf_get_lines(buf, row, row + 1, true)[1]
+end
+
+--- Converts |vim.Pos| to `lsp.Position`.
+---
+--- Example:
+--- ```lua
+--- -- `buf` is required for conversion to LSP position.
+--- local buf = vim.api.nvim_get_current_buf()
+--- local pos = vim.pos(3, 5, { buf = buf })
+---
+--- -- Convert to LSP position, you can call it in a method style.
+--- local lsp_pos = pos:lsp('utf-16')
+--- ```
+---@param pos vim.Pos
+---@param position_encoding lsp.PositionEncodingKind
+function Pos.to_lsp(pos, position_encoding)
+  validate('pos', pos, 'table')
+  validate('position_encoding', position_encoding, 'string')
+
+  local buf = assert(pos.buf, 'position is not a buffer position')
+  local row, col = pos.row, pos.col
+  -- When on the first character,
+  -- we can ignore the difference between byte and character.
+  if col > 0 then
+    col = vim.str_utfindex(get_line(buf, row), position_encoding, col, false)
+  end
+
+  ---@type lsp.Position
+  return { line = row, character = col }
+end
+
+--- Creates a new |vim.Pos| from `lsp.Position`.
+---
+--- Example:
+--- ```lua
+--- local buf = vim.api.nvim_get_current_buf()
+--- local lsp_pos = {
+---   line = 3,
+---   character = 5
+--- }
+---
+--- -- `buf` is mandatory, as LSP positions are always associated with a buffer.
+--- local pos = vim.pos.lsp(buf, lsp_pos, 'utf-16')
+--- ```
+---@param buf integer
+---@param pos lsp.Position
+---@param position_encoding lsp.PositionEncodingKind
+function Pos.lsp(buf, pos, position_encoding)
+  validate('buf', buf, 'number')
+  validate('pos', pos, 'table')
+  validate('position_encoding', position_encoding, 'string')
+
+  local row, col = pos.line, pos.character
+  -- When on the first character,
+  -- we can ignore the difference between byte and character.
+  if col > 0 then
+    col = vim.str_byteindex(get_line(buf, row), position_encoding, col)
+  end
+
+  return Pos.new(row, col, { buf = buf })
+end
+
+-- Overload `Range.new` to allow calling this module as a function.
+setmetatable(Pos, {
+  __call = function(_, ...)
+    return Pos.new(...)
+  end,
+})
+---@cast Pos +fun(row: integer, col: integer, opts: vim.Pos.Optional?): vim.Pos
+
+return Pos

runtime/lua/vim/range.lua

@@ -0,0 +1,194 @@
+---@brief
+---
+--- WARNING: This module is under experimental support.
+--- Its semantics are not yet finalized,
+--- and the stability of this API is not guaranteed.
+--- Avoid using it outside of Nvim.
+--- You may subscribe to or participate in the tracking issue
+--- https://github.com/neovim/neovim/issues/25509
+--- to stay updated or contribute to its development.
+---
+--- Built on |vim.Range| objects, this module offers operations
+--- that support comparisons as well as containment checks
+--- (for positions and for other ranges).
+--- conversions between various types of ranges is also provided.
+
+local validate = vim.validate
+
+--- Represents a well-defined range.
+---
+--- A |vim.Range| object contains a {start} and a {end_} position(see |vim.Pos|).
+--- Note that the {end_} position is exclusive.
+--- To create a new |vim.Range| object, call `vim.range()`.
+---
+--- Example:
+--- ```lua
+--- local pos1 = vim.pos(3, 5)
+--- local pos2 = vim.pos(4, 0)
+---
+--- -- Create a range from two positions.
+--- local range1 = vim.range(pos1, pos2)
+--- -- Or createa range from four integers representing start and end positions.
+--- local range2 = vim.range(3, 5, 4, 0)
+---
+--- -- Because `vim.Range` is end exclusive, `range1` and `range2` both represent
+--- -- a range starting at the row 3, column 5 and ending at where the row 3 ends.
+---
+--- -- Operators are overloaded for comparing two `vim.Pos` objects.
+--- if range1 == range2 then
+---   print("range1 and range2 are the same range")
+--- end
+--- ```
+---
+--- It may include optional fields that enable additional capabilities,
+--- such as format conversions. Note that the {start} and {end_} positions
+--- need to have the same optional fields.
+---
+---@class vim.Range
+---@field start vim.Pos Start position.
+---@field end_ vim.Pos End position, exclusive.
+local Range = {}
+Range.__index = Range
+
+---@package
+---@overload fun(self: vim.Range, start: vim.Pos, end_: vim.Pos): vim.Range
+---@overload fun(self: vim.Range, start_row: integer, start_col: integer, end_row: integer, end_col: integer, opts?: vim.Pos.Optional): vim.Range
+function Range.new(...)
+  ---@type vim.Pos, vim.Pos, vim.Pos.Optional
+  local start, end_
+
+  local nargs = select('#', ...)
+  if nargs == 2 then
+    ---@type vim.Pos, vim.Pos
+    start, end_ = ...
+    validate('start', start, 'table')
+    validate('end_', end_, 'table')
+
+    if start.buf ~= end_.buf then
+      error('start and end positions must belong to the same buffer')
+    end
+  elseif nargs == 4 or nargs == 5 then
+    ---@type integer, integer, integer, integer, vim.Pos.Optional
+    local start_row, start_col, end_row, end_col, opts = ...
+    start, end_ = vim.pos(start_row, start_col, opts), vim.pos(end_row, end_col, opts)
+  else
+    error('invalid parameters')
+  end
+
+  ---@type vim.Range
+  local self = setmetatable({
+    start = start,
+    end_ = end_,
+  }, Range)
+
+  return self
+end
+
+---@private
+---@param r1 vim.Range
+---@param r2 vim.Range
+function Range.__lt(r1, r2)
+  return r1.end_ < r2.start
+end
+
+---@private
+---@param r1 vim.Range
+---@param r2 vim.Range
+function Range.__le(r1, r2)
+  return r1.end_ <= r2.start
+end
+
+---@private
+---@param r1 vim.Range
+---@param r2 vim.Range
+function Range.__eq(r1, r2)
+  return r1.start == r2.start and r1.end_ == r2.end_
+end
+
+--- Checks whether {outer} range contains {inner} range.
+---
+---@param outer vim.Range
+---@param inner vim.Range
+---@return boolean `true` if {outer} range fully contains {inner} range.
+function Range.has(outer, inner)
+  return outer.start <= inner.start and outer.end_ >= inner.end_
+end
+
+--- Computes the common range shared by the given ranges.
+---
+---@param r1 vim.Range First range to intersect.
+---@param r2 vim.Range Second range to intersect
+---@return vim.Range? range that is present inside both `r1` and `r2`.
+---                   `nil` if such range does not exist.
+function Range.intersect(r1, r2)
+  if r1.end_ <= r2.start or r1.start >= r2.end_ then
+    return nil
+  end
+  local rs = r1.start <= r2.start and r2 or r1
+  local re = r1.end_ >= r2.end_ and r2 or r1
+  return Range.new(rs.start, re.end_)
+end
+
+--- Converts |vim.Range| to `lsp.Range`.
+---
+--- Example:
+--- ```lua
+--- -- `buf` is required for conversion to LSP range.
+--- local buf = vim.api.nvim_get_current_buf()
+--- local range = vim.range(3, 5, 4, 0, { buf = buf })
+---
+--- -- Convert to LSP range, you can call it in a method style.
+--- local lsp_range = range:to_lsp('utf-16')
+--- ```
+---@param range vim.Range
+---@param position_encoding lsp.PositionEncodingKind
+function Range.to_lsp(range, position_encoding)
+  validate('range', range, 'table')
+  validate('position_encoding', position_encoding, 'string', true)
+
+  ---@type lsp.Range
+  return {
+    ['start'] = range.start:to_lsp(position_encoding),
+    ['end'] = range.end_:to_lsp(position_encoding),
+  }
+end
+
+--- Creates a new |vim.Range| from `lsp.Range`.
+---
+--- Example:
+--- ```lua
+--- local buf = vim.api.nvim_get_current_buf()
+--- local lsp_range = {
+---   ['start'] = { line = 3, character = 5 },
+---   ['end'] = { line = 4, character = 0 }
+--- }
+---
+--- -- `buf` is mandatory, as LSP ranges are always associated with a buffer.
+--- local range = vim.range.lsp(buf, lsp_range, 'utf-16')
+--- ```
+---@param buf integer
+---@param range lsp.Range
+---@param position_encoding lsp.PositionEncodingKind
+function Range.lsp(buf, range, position_encoding)
+  validate('buf', buf, 'number')
+  validate('range', range, 'table')
+  validate('position_encoding', position_encoding, 'string')
+
+  -- TODO(ofseed): avoid using `Pos:lsp()` here,
+  -- as they need reading files separately if buffer is unloaded.
+  local start = vim.pos.lsp(buf, range['start'], position_encoding)
+  local end_ = vim.pos.lsp(buf, range['end'], position_encoding)
+
+  return Range.new(start, end_)
+end
+
+-- Overload `Range.new` to allow calling this module as a function.
+setmetatable(Range, {
+  __call = function(_, ...)
+    return Range.new(...)
+  end,
+})
+---@cast Range +fun(start: vim.Pos, end_: vim.Pos): vim.Range
+---@cast Range +fun(start_row: integer, start_col: integer, end_row: integer, end_col: integer, opts?: vim.Pos.Optional): vim.Range
+
+return Range

src/gen/gen_vimdoc.lua

@@ -155,6 +155,8 @@ local config = {
       'lpeg.lua',
       'mpack.lua',
       'net.lua',
+      'pos.lua',
+      'range.lua',
       're.lua',
       'regex.lua',
       'secure.lua',
@@ -193,6 +195,8 @@ local config = {
       'runtime/lua/vim/keymap.lua',
       'runtime/lua/vim/loader.lua',
       'runtime/lua/vim/net.lua',
+      'runtime/lua/vim/pos.lua',
+      'runtime/lua/vim/range.lua',
       'runtime/lua/vim/secure.lua',
       'runtime/lua/vim/shared.lua',
       'runtime/lua/vim/snippet.lua',

test/functional/lua/pos_spec.lua

@@ -0,0 +1,91 @@
+-- Test suite for vim.pos
+local t = require('test.testutil')
+local n = require('test.functional.testnvim')()
+local eq = t.eq
+
+local clear = n.clear
+local exec_lua = n.exec_lua
+local insert = n.insert
+
+describe('vim.pos', function()
+  before_each(clear)
+  after_each(clear)
+
+  it('creates a position with or without optional fields', function()
+    local pos = exec_lua(function()
+      return vim.pos(3, 5)
+    end)
+    eq(3, pos.row)
+    eq(5, pos.col)
+    eq(nil, pos.buf)
+
+    local buf = exec_lua(function()
+      return vim.api.nvim_create_buf(false, true)
+    end)
+    pos = exec_lua(function()
+      return vim.pos(3, 5, { buf = buf })
+    end)
+    eq(3, pos.row)
+    eq(5, pos.col)
+    eq(buf, pos.buf)
+  end)
+
+  it('supports comparisons by overloaded mathmatical operators', function()
+    eq(
+      true,
+      exec_lua(function()
+        return vim.pos(3, 5) < vim.pos(4, 5)
+      end)
+    )
+    eq(
+      true,
+      exec_lua(function()
+        return vim.pos(3, 5) <= vim.pos(3, 6)
+      end)
+    )
+    eq(
+      true,
+      exec_lua(function()
+        return vim.pos(3, 5) > vim.pos(2, 5)
+      end)
+    )
+    eq(
+      true,
+      exec_lua(function()
+        return vim.pos(3, 5) >= vim.pos(3, 5)
+      end)
+    )
+    eq(
+      true,
+      exec_lua(function()
+        return vim.pos(3, 5) == vim.pos(3, 5)
+      end)
+    )
+    eq(
+      true,
+      exec_lua(function()
+        return vim.pos(3, 5) ~= vim.pos(3, 6)
+      end)
+    )
+  end)
+
+  it('supports conversion between vim.Pos and lsp.Position', function()
+    local buf = exec_lua(function()
+      return vim.api.nvim_get_current_buf()
+    end)
+    insert('Neovim 是 Vim 的分支，专注于扩展性和可用性。')
+    local lsp_pos = exec_lua(function()
+      local pos = vim.pos(0, 36, { buf = buf })
+      return pos:to_lsp('utf-16')
+    end)
+    eq({ line = 0, character = 20 }, lsp_pos)
+    local pos = exec_lua(function()
+      return vim.pos.lsp(buf, lsp_pos, 'utf-16')
+    end)
+    eq({
+      buf = buf,
+      row = 0,
+      col = 36,
+    }, pos)
+  end)
+end)

test/functional/lua/range_spec.lua

@@ -0,0 +1,86 @@
+-- Test suite for vim.range
+local t = require('test.testutil')
+local n = require('test.functional.testnvim')()
+local eq = t.eq
+
+local clear = n.clear
+local exec_lua = n.exec_lua
+local insert = n.insert
+
+describe('vim.range', function()
+  before_each(clear)
+  after_each(clear)
+
+  it('creates a range with or without optional fields', function()
+    local range = exec_lua(function()
+      return vim.range(3, 5, 4, 6)
+    end)
+    eq(3, range.start.row)
+    eq(5, range.start.col)
+    eq(4, range.end_.row)
+    eq(6, range.end_.col)
+    eq(nil, range.start.buf)
+    eq(nil, range.end_.buf)
+    local buf = exec_lua(function()
+      return vim.api.nvim_create_buf(false, true)
+    end)
+    range = exec_lua(function()
+      return vim.range(3, 5, 4, 6, { buf = buf })
+    end)
+    eq(buf, range.start.buf)
+    eq(buf, range.end_.buf)
+  end)
+
+  it('create a range from two positions when optional fields are not matched', function()
+    local range = exec_lua(function()
+      return vim.range(vim.pos(3, 5), vim.pos(4, 6))
+    end)
+    eq(3, range.start.row)
+    eq(5, range.start.col)
+    eq(4, range.end_.row)
+    eq(6, range.end_.col)
+    eq(nil, range.start.buf)
+    eq(nil, range.end_.buf)
+
+    local buf1 = exec_lua(function()
+      return vim.api.nvim_create_buf(false, true)
+    end)
+    range = exec_lua(function()
+      return vim.range(vim.pos(3, 5, { buf = buf1 }), vim.pos(4, 6, { buf = buf1 }))
+    end)
+    eq(buf1, range.start.buf)
+    eq(buf1, range.end_.buf)
+
+    local buf2 = exec_lua(function()
+      return vim.api.nvim_create_buf(false, true)
+    end)
+    local success = exec_lua(function()
+      return pcall(function()
+        return vim.range(vim.pos(3, 5, { buf = buf1 }), vim.pos(4, 6, { buf = buf2 }))
+      end)
+    end)
+    eq(success, false)
+  end)
+
+  it('supports conversion between vim.Range and lsp.Range', function()
+    local buf = exec_lua(function()
+      return vim.api.nvim_get_current_buf()
+    end)
+    insert('Neovim 是 Vim 的分支，专注于扩展性和可用性。')
+    local lsp_range = exec_lua(function()
+      local range = vim.range(0, 10, 0, 36, { buf = buf })
+      return range:to_lsp('utf-16')
+    end)
+    eq({
+      ['start'] = { line = 0, character = 8 },
+      ['end'] = { line = 0, character = 20 },
+    }, lsp_range)
+    local range = exec_lua(function()
+      return vim.range.lsp(buf, lsp_range, 'utf-16')
+    end)
+    eq({
+      start = { row = 0, col = 10, buf = buf },
+      end_ = { row = 0, col = 36, buf = buf },
+    }, range)
+  end)
+end)