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test_struct.lua
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test_struct.lua
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local struct = require("acid.struct")
local strutil = require("acid.strutil")
local char = string.char
local to_str = strutil.to_str
function test.pack_and_unpack_int32(t)
local cases = {
{0x01, char(0x00) .. char(0x00) .. char(0x00) .. char(0x01)},
{0x10, char(0x00) .. char(0x00) .. char(0x00) .. char(0x10)},
{0x0100, char(0x00) .. char(0x00) .. char(0x01) .. char(0x00)},
{0x0101, char(0x00) .. char(0x00) .. char(0x01) .. char(0x01)},
{0x010000, char(0x00) .. char(0x01) .. char(0x00) .. char(0x00)},
{0x010100, char(0x00) .. char(0x01) .. char(0x01) .. char(0x00)},
{0x010101, char(0x00) .. char(0x01) .. char(0x01) .. char(0x01)},
{0x01000000, char(0x01) .. char(0x00) .. char(0x00) .. char(0x00)},
{0x01010000, char(0x01) .. char(0x01) .. char(0x00) .. char(0x00)},
{0x01010100, char(0x01) .. char(0x01) .. char(0x01) .. char(0x00)},
{0x01010101, char(0x01) .. char(0x01) .. char(0x01) .. char(0x01)},
}
local num, str, pack_str, unpack_num
for _, case in ipairs(cases) do
num, str = case[1], case[2]
pack_str = struct.pack_int32(num)
t:eq(str, pack_str)
pack_str = struct.pack_int32(num, true)
t:eq(string.reverse(str), pack_str)
unpack_num = struct.unpack_int32({stream=str, offset=1}, false, false)
t:eq(num, unpack_num)
unpack_num = struct.unpack_int32({stream=string.reverse(str), offset=1}, true, false)
t:eq(num, unpack_num)
end
cases = {
{-1, char(0xff) .. char(0xff) .. char(0xff) .. char(0xff)},
{-(2 ^ 4), char(0xff) .. char(0xff) .. char(0xff) .. char(0xf0)},
{-(2 ^ 8), char(0xff) .. char(0xff) .. char(0xff) .. char(0x00)},
{-(2 ^ 8 + 1), char(0xff) .. char(0xff) .. char(0xfe) .. char(0xff)},
{-(2 ^ 16), char(0xff) .. char(0xff) .. char(0x00) .. char(0x00)},
{-(2 ^ 16 + 2 ^ 8), char(0xff) .. char(0xfe) .. char(0xff) .. char(0x00)},
{-(2 ^ 16 + 2 ^ 8 + 1), char(0xff) .. char(0xfe) .. char(0xfe) .. char(0xff)},
{-(2 ^ 24), char(0xff) .. char(0x00) .. char(0x00) .. char(0x00)},
{-(2 ^ 24 + 2 ^ 16), char(0xfe) .. char(0xff) .. char(0x00) .. char(0x00)},
{-(2 ^ 24 + 2 ^ 16 + 2 ^ 8), char(0xfe) .. char(0xfe) .. char(0xff) .. char(0x00)},
{-(2 ^ 24 + 2 ^ 16 + 2 ^ 8 + 1), char(0xfe) .. char(0xfe) .. char(0xfe) .. char(0xff)},
}
local num, str, pack_str, unpack_num
for _, case in ipairs(cases) do
num, str = case[1], case[2]
pack_str = struct.pack_int32(num)
t:eq(str, pack_str)
pack_str = struct.pack_int32(num, true)
t:eq(string.reverse(str), pack_str)
unpack_num = struct.unpack_int32({stream=str, offset=1}, false, true)
t:eq(num, unpack_num)
unpack_num = struct.unpack_int32({stream=string.reverse(str), offset=1}, true, true)
t:eq(num, unpack_num)
end
local err_cases = {
{'abc', 'TypeError', 'input must be a number'},
{-2 ^ 31 - 1, 'ValueError', 'input requires -2 ^ 31 <= val <= 2 ^ 32 - 1'},
{2 ^ 32, 'ValueError', 'input requires -2 ^ 31 <= val <= 2 ^ 32 - 1'},
}
for _, c in ipairs(err_cases) do
local _, err, errmsg = struct.pack_int32(c[1])
t:eq(c[2], err)
t:eq(c[3], errmsg)
end
local _, err, errmsg = struct.unpack_int32({stream=char(22), offset=1})
t:eq('ValueError', err)
t:eq('expected:4 chars got:1 chars', errmsg)
end
function test.pack_and_unpack_string(t)
local cases = {
'',
'123',
'#j()',
'abc',
'abc&23',
}
for _, c in ipairs(cases) do
local s = struct.pack_string(c)
t:eq(struct.pack_int32(#c) .. c, s)
t:eq(c, struct.unpack_string({stream=s, offset=1}))
end
t:eq('', struct.unpack_string({stream=struct.pack_int32(0), offset=1}))
local _, err, errmsg = struct.unpack_string({stream=struct.pack_int32(-1), offset=1})
t:eq('ValueError', err)
t:eq('expected: length >= 0 got:-1', errmsg)
local _, err, errmsg = struct.unpack_string({stream=char(22), offset=1})
t:eq('ValueError', err)
end
function test.pack_and_unpack(t)
local cases = {
{'i', {1}, struct.pack_int32(1), 'i'},
{'>i', {2}, struct.pack_int32(2), '>i'},
{'<i', {3}, struct.pack_int32(3, true), '<i'},
{'I', {4}, struct.pack_int32(4), 'I'},
{'>I', {5}, struct.pack_int32(5), '>I'},
{'<I', {6}, struct.pack_int32(6, true), '<I'},
{'s', {'foo'}, 'foo', '3s'},
{'ss', {'foo', 'bar'}, 'foobar', '3s3s'},
{'sss', {'foo', 'foo', 'foo'}, 'foofoofoo', '3s3s3s'},
{'S', {'bar'}, struct.pack_string('bar'), 'S'},
{'iIsS', {12, 123, 'foo', 'bar'}, struct.pack_int32(12) .. struct.pack_int32(123) .. 'foo' .. struct.pack_string('bar'), 'iI3sS'},
{'>iIsS', {12, 123, 'foo', 'bar'}, struct.pack_int32(12) .. struct.pack_int32(123) .. 'foo' .. struct.pack_string('bar'), '>iI3sS'},
{'<iIsS', {12, 123, 'foo', 'bar'}, struct.pack_int32(12, true) .. struct.pack_int32(123, true) .. 'foo' .. struct.pack_string('bar'), '<iI3sS'},
}
for _, c in ipairs(cases) do
local r = struct.pack(c[1], unpack(c[2]))
t:eq(c[3], r)
r = struct.unpack(c[4], {stream=c[3], offset=1})
t:eq(to_str(c[2]), to_str(r))
end
local _, err, errmsg = struct.pack('&')
t:eq('UnsupportFormat', err)
local _, err, errmsg = struct.unpack('z')
t:eq('UnsupportFormat', err)
local _, err, errmsg = struct.unpack('3s', {stream='f', offset=1})
t:eq('ValueError', err)
local _, err, errmsg = struct.unpack('s', {stream='f', offset=1})
t:eq('ValueError', err)
end