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local ffi = require('ffi')
local helpers = require('test.unit.helpers')
local eval_helpers = require('test.unit.eval.helpers')
local cimport = helpers.cimport
local to_cstr = helpers.to_cstr
local eq = helpers.eq
local list = eval_helpers.list
local lst2tbl = eval_helpers.lst2tbl
local type_key = eval_helpers.type_key
local list_type = eval_helpers.list_type
local null_string = eval_helpers.null_string
local decode = cimport('./src/nvim/eval/decode.h', './src/nvim/eval_defs.h',
'./src/nvim/globals.h', './src/nvim/memory.h')
describe('json_decode_string()', function()
after_each(function()
decode.emsg_silent = 0
end)
it('does not overflow when running with `n…`, `t…`, `f…`', function()
local rettv = ffi.new('typval_T')
decode.emsg_silent = 1
rettv.v_type = decode.VAR_UNKNOWN
-- This will not crash, but if `len` argument will be ignored it will parse
-- `null` as `null` and if not it will parse `null` as `n`.
eq(0, decode.json_decode_string('null', 1, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string('true', 1, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string('false', 1, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string('null', 2, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string('true', 2, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string('false', 2, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string('null', 3, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string('true', 3, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string('false', 3, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string('false', 4, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
end)
it('does not overflow and crash when running with `n`, `t`, `f`', function()
local rettv = ffi.new('typval_T')
decode.emsg_silent = 1
rettv.v_type = decode.VAR_UNKNOWN
local char = function(c)
return ffi.gc(decode.xmemdup(c, 1), decode.xfree)
end
eq(0, decode.json_decode_string(char('n'), 1, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string(char('t'), 1, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
eq(0, decode.json_decode_string(char('f'), 1, rettv))
eq(decode.VAR_UNKNOWN, rettv.v_type)
end)
end)
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