mirror of
https://github.com/neovim/neovim.git
synced 2025-10-26 12:27:24 +00:00
277 lines
9.1 KiB
Lua
277 lines
9.1 KiB
Lua
local t = require('test.unit.testutil')
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local itp = t.gen_itp(it)
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local ffi = t.ffi
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local eq = t.eq
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local lib = t.cimport('./src/nvim/mbyte.h', './src/nvim/charset.h', './src/nvim/grid.h')
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describe('mbyte', function()
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-- Convert from bytes to string
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local function to_string(bytes)
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local s = {}
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for i = 1, #bytes do
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s[i] = string.char(bytes[i])
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end
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return table.concat(s)
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end
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before_each(function() end)
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itp('utf_ptr2char', function()
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-- For strings with length 1 the first byte is returned.
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for c = 0, 255 do
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eq(c, lib.utf_ptr2char(to_string({ c, 0 })))
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end
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-- Some ill formed byte sequences that should not be recognized as UTF-8
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-- First byte: 0xc0 or 0xc1
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-- Second byte: 0x80 .. 0xbf
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--eq(0x00c0, lib.utf_ptr2char(to_string({0xc0, 0x80})))
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--eq(0x00c1, lib.utf_ptr2char(to_string({0xc1, 0xbf})))
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--
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-- Sequences with more than four bytes
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end)
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for n = 0, 0xF do
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itp(('utf_char2bytes for chars 0x%x - 0x%x'):format(n * 0x1000, n * 0x1000 + 0xFFF), function()
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local char_p = ffi.typeof('char[?]')
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for c = n * 0x1000, n * 0x1000 + 0xFFF do
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local p = char_p(4, 0)
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lib.utf_char2bytes(c, p)
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eq(c, lib.utf_ptr2char(p))
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eq(lib.vim_iswordc(c), lib.vim_iswordp(p))
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end
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end)
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end
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describe('utfc_ptr2schar_len', function()
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local function test_seq(seq)
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local firstc = ffi.new('int[1]')
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local buf = ffi.new('char[32]')
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lib.schar_get(buf, lib.utfc_ptr2schar_len(to_string(seq), #seq, firstc))
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return { ffi.string(buf), firstc[0] }
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end
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local function byte(val)
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return { string.char(val), val }
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end
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itp('1-byte sequences', function()
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eq({ '', 0 }, test_seq { 0 })
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for c = 1, 127 do
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eq(byte(c), test_seq { c })
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end
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for c = 128, 255 do
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eq({ '', c }, test_seq { c })
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end
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end)
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itp('2-byte sequences', function()
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-- No combining characters
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eq(byte(0x7f), test_seq { 0x7f, 0x7f })
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-- No combining characters
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eq(byte(0x7f), test_seq { 0x7f, 0x80 })
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-- No UTF-8 sequence
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eq({ '', 0xc2 }, test_seq { 0xc2, 0x7f })
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-- One UTF-8 character
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eq({ '\xc2\x80', 0x80 }, test_seq { 0xc2, 0x80 })
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-- No UTF-8 sequence
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eq({ '', 0xc2 }, test_seq { 0xc2, 0xc0 })
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end)
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itp('3-byte sequences', function()
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-- No second UTF-8 character
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eq(byte(0x7f), test_seq { 0x7f, 0x80, 0x80 })
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-- No combining character
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eq(byte(0x7f), test_seq { 0x7f, 0xc2, 0x80 })
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-- Combining character is U+0300
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eq({ '\x7f\xcc\x80', 0x7f }, test_seq { 0x7f, 0xcc, 0x80 })
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-- No UTF-8 sequence
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eq({ '', 0xc2 }, test_seq { 0xc2, 0x7f, 0xcc })
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-- Incomplete combining character
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eq({ '\xc2\x80', 0x80 }, test_seq { 0xc2, 0x80, 0xcc })
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-- One UTF-8 character (composing only)
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eq({ ' \xe2\x83\x90', 0x20d0 }, test_seq { 0xe2, 0x83, 0x90 })
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end)
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itp('4-byte sequences', function()
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-- No following combining character
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eq(byte(0x7f), test_seq { 0x7f, 0x7f, 0xcc, 0x80 })
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-- No second UTF-8 character
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eq(byte(0x7f), test_seq { 0x7f, 0xc2, 0xcc, 0x80 })
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-- Combining character U+0300
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eq({ '\x7f\xcc\x80', 0x7f }, test_seq { 0x7f, 0xcc, 0x80, 0xcc })
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-- No UTF-8 sequence
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eq({ '', 0xc2 }, test_seq { 0xc2, 0x7f, 0xcc, 0x80 })
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-- No following UTF-8 character
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eq({ '\xc2\x80', 0x80 }, test_seq { 0xc2, 0x80, 0xcc, 0xcc })
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-- Combining character U+0301
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eq({ '\xc2\x80\xcc\x81', 0x80 }, test_seq { 0xc2, 0x80, 0xcc, 0x81 })
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-- One UTF-8 character
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eq({ '\xf4\x80\x80\x80', 0x100000 }, test_seq { 0xf4, 0x80, 0x80, 0x80 })
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end)
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itp('5+-byte sequences', function()
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-- No following combining character
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eq(byte(0x7f), test_seq { 0x7f, 0x7f, 0xcc, 0x80, 0x80 })
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-- No second UTF-8 character
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eq(byte(0x7f), test_seq { 0x7f, 0xc2, 0xcc, 0x80, 0x80 })
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-- Combining character U+0300
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eq({ '\x7f\xcc\x80', 0x7f }, test_seq { 0x7f, 0xcc, 0x80, 0xcc, 0x00 })
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-- Combining characters U+0300 and U+0301
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eq({ '\x7f\xcc\x80\xcc\x81', 0x7f }, test_seq { 0x7f, 0xcc, 0x80, 0xcc, 0x81 })
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-- Combining characters U+0300, U+0301, U+0302
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eq(
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{ '\x7f\xcc\x80\xcc\x81\xcc\x82', 0x7f },
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test_seq { 0x7f, 0xcc, 0x80, 0xcc, 0x81, 0xcc, 0x82 }
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)
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-- Combining characters U+0300, U+0301, U+0302, U+0303
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eq(
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{ '\x7f\xcc\x80\xcc\x81\xcc\x82\xcc\x83', 0x7f },
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test_seq { 0x7f, 0xcc, 0x80, 0xcc, 0x81, 0xcc, 0x82, 0xcc, 0x83 }
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)
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-- Combining characters U+0300, U+0301, U+0302, U+0303, U+0304
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eq(
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{ '\x7f\xcc\x80\xcc\x81\xcc\x82\xcc\x83\xcc\x84', 0x7f },
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test_seq { 0x7f, 0xcc, 0x80, 0xcc, 0x81, 0xcc, 0x82, 0xcc, 0x83, 0xcc, 0x84 }
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)
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-- Combining characters U+0300, U+0301, U+0302, U+0303, U+0304, U+0305
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eq(
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{ '\x7f\xcc\x80\xcc\x81\xcc\x82\xcc\x83\xcc\x84\xcc\x85', 0x7f },
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test_seq { 0x7f, 0xcc, 0x80, 0xcc, 0x81, 0xcc, 0x82, 0xcc, 0x83, 0xcc, 0x84, 0xcc, 0x85 }
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)
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-- Combining characters U+0300, U+0301, U+0302, U+0303, U+0304, U+0305, U+0306
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eq(
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{ '\x7f\xcc\x80\xcc\x81\xcc\x82\xcc\x83\xcc\x84\xcc\x85\xcc\x86', 0x7f },
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test_seq {
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0x7f,
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0xcc,
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0x80,
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0xcc,
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0x81,
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0xcc,
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0x82,
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0xcc,
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0x83,
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0xcc,
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0x84,
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0xcc,
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0x85,
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0xcc,
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0x86,
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}
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)
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-- Only three following combining characters U+0300, U+0301, U+0302
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eq(
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{ '\x7f\xcc\x80\xcc\x81\xcc\x82', 0x7f },
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test_seq { 0x7f, 0xcc, 0x80, 0xcc, 0x81, 0xcc, 0x82, 0xc2, 0x80, 0xcc, 0x84, 0xcc, 0x85 }
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)
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-- No UTF-8 sequence
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eq({ '', 0xc2 }, test_seq { 0xc2, 0x7f, 0xcc, 0x80, 0x80 })
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-- No following UTF-8 character
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eq({ '\xc2\x80', 0x80 }, test_seq { 0xc2, 0x80, 0xcc, 0xcc, 0x80 })
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-- Combining character U+0301
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eq({ '\xc2\x80\xcc\x81', 0x80 }, test_seq { 0xc2, 0x80, 0xcc, 0x81, 0x7f })
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-- Combining character U+0301
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eq({ '\xc2\x80\xcc\x81', 0x80 }, test_seq { 0xc2, 0x80, 0xcc, 0x81, 0xcc })
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-- One UTF-8 character
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eq({ '\xf4\x80\x80\x80', 0x100000 }, test_seq { 0xf4, 0x80, 0x80, 0x80, 0x7f })
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-- One UTF-8 character
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eq({ '\xf4\x80\x80\x80', 0x100000 }, test_seq { 0xf4, 0x80, 0x80, 0x80, 0x80 })
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-- One UTF-8 character
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eq({ '\xf4\x80\x80\x80', 0x100000 }, test_seq { 0xf4, 0x80, 0x80, 0x80, 0xcc })
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-- Combining characters U+1AB0 and U+0301
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eq(
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{ '\xf4\x80\x80\x80\xe1\xaa\xb0\xcc\x81', 0x100000 },
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test_seq { 0xf4, 0x80, 0x80, 0x80, 0xe1, 0xaa, 0xb0, 0xcc, 0x81 }
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)
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end)
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end)
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describe('utf_cp_bounds_len', function()
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local to_cstr = t.to_cstr
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local tests = {
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{
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name = 'for valid string',
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str = 'iÀiiⱠiⱠⱠ𐀀i',
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offsets = {
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b = { 0, 0, 1, 0, 0, 0, 1, 2, 0, 0, 1, 2, 0, 1, 2, 0, 1, 2, 3, 0 },
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e = { 1, 2, 1, 1, 1, 3, 2, 1, 1, 3, 2, 1, 3, 2, 1, 4, 3, 2, 1, 1 },
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},
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},
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{
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name = 'for string with incomplete sequence',
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str = 'i\xC3iÀⱠiÀ\xE2\xB1Ⱡ\xF0\x90\x80',
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offsets = {
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b = { 0, 0, 0, 0, 1, 0, 1, 2, 0, 0, 1, 0, 0, 0, 1, 2, 0, 0, 0 },
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e = { 1, 1, 1, 2, 1, 3, 2, 1, 1, 2, 1, 1, 1, 3, 2, 1, 1, 1, 1 },
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},
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},
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{
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name = 'for string with trailing bytes after multibyte',
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str = 'iÀ\xA0Ⱡ\xA0Ⱡ𐀀\xA0i',
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offsets = {
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b = { 0, 0, 1, 0, 0, 1, 2, 0, 0, 1, 2, 0, 1, 2, 3, 0, 0 },
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e = { 1, 2, 1, 1, 3, 2, 1, 1, 3, 2, 1, 4, 3, 2, 1, 1, 1 },
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},
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},
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}
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for _, test in ipairs(tests) do
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itp(test.name, function()
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local cstr = to_cstr(test.str)
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local b_offsets, e_offsets = {}, {}
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for i = 1, #test.str do
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local result = lib.utf_cp_bounds_len(cstr, cstr + i - 1, #test.str - (i - 1))
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table.insert(b_offsets, result.begin_off)
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table.insert(e_offsets, result.end_off)
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end
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eq(test.offsets, { b = b_offsets, e = e_offsets })
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end)
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end
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itp('does not read before start', function()
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local str = '𐀀'
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local expected_offsets = { b = { 0, 0, 0 }, e = { 1, 1, 1 } }
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local cstr = to_cstr(str) + 1
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local b_offsets, e_offsets = {}, {}
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for i = 1, 3 do
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local result = lib.utf_cp_bounds_len(cstr, cstr + i - 1, 3 - (i - 1))
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table.insert(b_offsets, result.begin_off)
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table.insert(e_offsets, result.end_off)
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end
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eq(expected_offsets, { b = b_offsets, e = e_offsets })
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end)
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itp('does not read past the end', function()
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local str = '𐀀'
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local expected_offsets = { b = { 0, 0, 0 }, e = { 1, 1, 1 } }
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local cstr = to_cstr(str)
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local b_offsets, e_offsets = {}, {}
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for i = 1, 3 do
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local result = lib.utf_cp_bounds_len(cstr, cstr + i - 1, 3 - (i - 1))
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table.insert(b_offsets, result.begin_off)
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table.insert(e_offsets, result.end_off)
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end
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eq(expected_offsets, { b = b_offsets, e = e_offsets })
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end)
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end)
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end)
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