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authorBenoit Giannangeli <giann008@gmail.com>2017-05-19 15:37:45 +0200
committerBenoit Giannangeli <giann008@gmail.com>2017-05-19 15:40:01 +0200
commit7e930b72c0f79beb05665ab61d1dbcf311a72da5 (patch)
treee6638226e67d296a9f2c8ac8afa08c4068b5f55c /tests/test-suite/inprogress/bitwise.js
parent705574bf31fc57cc3513e441fb83cae09b2d0bae (diff)
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Moved in progress tests to seperate folder
Diffstat (limited to 'tests/test-suite/inprogress/bitwise.js')
-rw-r--r--tests/test-suite/inprogress/bitwise.js504
1 files changed, 504 insertions, 0 deletions
diff --git a/tests/test-suite/inprogress/bitwise.js b/tests/test-suite/inprogress/bitwise.js
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+++ b/tests/test-suite/inprogress/bitwise.js
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+"use strict";
+
+const test = require('tape');
+
+global.WEB = false;
+
+const lua = require('../../src/lua.js');
+const lauxlib = require('../../src/lauxlib.js');
+const lualib = require('../../src/lualib.js');
+
+
+const prefix = `
+ package.preload.bit32 = function () --{
+
+ -- no built-in 'bit32' library: implement it using bitwise operators
+
+ local bit = {}
+
+ function bit.bnot (a)
+ return ~a & 0xFFFFFFFF
+ end
+
+
+ --
+ -- in all vararg functions, avoid creating 'arg' table when there are
+ -- only 2 (or less) parameters, as 2 parameters is the common case
+ --
+
+ function bit.band (x, y, z, ...)
+ if not z then
+ return ((x or -1) & (y or -1)) & 0xFFFFFFFF
+ else
+ local arg = {...}
+ local res = x & y & z
+ for i = 1, #arg do res = res & arg[i] end
+ return res & 0xFFFFFFFF
+ end
+ end
+
+ function bit.bor (x, y, z, ...)
+ if not z then
+ return ((x or 0) | (y or 0)) & 0xFFFFFFFF
+ else
+ local arg = {...}
+ local res = x | y | z
+ for i = 1, #arg do res = res | arg[i] end
+ return res & 0xFFFFFFFF
+ end
+ end
+
+ function bit.bxor (x, y, z, ...)
+ if not z then
+ return ((x or 0) ~ (y or 0)) & 0xFFFFFFFF
+ else
+ local arg = {...}
+ local res = x ~ y ~ z
+ for i = 1, #arg do res = res ~ arg[i] end
+ return res & 0xFFFFFFFF
+ end
+ end
+
+ function bit.btest (...)
+ return bit.band(...) ~= 0
+ end
+
+ function bit.lshift (a, b)
+ return ((a & 0xFFFFFFFF) << b) & 0xFFFFFFFF
+ end
+
+ function bit.rshift (a, b)
+ return ((a & 0xFFFFFFFF) >> b) & 0xFFFFFFFF
+ end
+
+ function bit.arshift (a, b)
+ a = a & 0xFFFFFFFF
+ if b <= 0 or (a & 0x80000000) == 0 then
+ return (a >> b) & 0xFFFFFFFF
+ else
+ return ((a >> b) | ~(0xFFFFFFFF >> b)) & 0xFFFFFFFF
+ end
+ end
+
+ function bit.lrotate (a ,b)
+ b = b & 31
+ a = a & 0xFFFFFFFF
+ a = (a << b) | (a >> (32 - b))
+ return a & 0xFFFFFFFF
+ end
+
+ function bit.rrotate (a, b)
+ return bit.lrotate(a, -b)
+ end
+
+ local function checkfield (f, w)
+ w = w or 1
+ assert(f >= 0, "field cannot be negative")
+ assert(w > 0, "width must be positive")
+ assert(f + w <= 32, "trying to access non-existent bits")
+ return f, ~(-1 << w)
+ end
+
+ function bit.extract (a, f, w)
+ local f, mask = checkfield(f, w)
+ return (a >> f) & mask
+ end
+
+ function bit.replace (a, v, f, w)
+ local f, mask = checkfield(f, w)
+ v = v & mask
+ a = (a & ~(mask << f)) | (v << f)
+ return a & 0xFFFFFFFF
+ end
+
+ return bit
+
+ end --}
+
+ local bit32 = require'bit32'
+`;
+
+test("[test-suite] bitwise: testing bitwise operations", function (t) {
+ let luaCode = `
+ local numbits = string.packsize('j') * 8
+
+ assert(~0 == -1)
+
+ assert((1 << (numbits - 1)) == math.mininteger)
+
+ -- basic tests for bitwise operators;
+ -- use variables to avoid constant folding
+ local a, b, c, d
+ a = 0xFFFFFFFFFFFFFFFF
+ assert(a == -1 and a & -1 == a and a & 35 == 35)
+ a = 0xF0F0F0F0F0F0F0F0
+ assert(a | -1 == -1)
+ assert(a ~ a == 0 and a ~ 0 == a and a ~ ~a == -1)
+ assert(a >> 4 == ~a)
+ a = 0xF0; b = 0xCC; c = 0xAA; d = 0xFD
+ assert(a | b ~ c & d == 0xF4)
+
+ a = 0xF0.0; b = 0xCC.0; c = "0xAA.0"; d = "0xFD.0"
+ assert(a | b ~ c & d == 0xF4)
+
+ a = 0xF0000000; b = 0xCC000000;
+ c = 0xAA000000; d = 0xFD000000
+ assert(a | b ~ c & d == 0xF4000000)
+ assert(~~a == a and ~a == -1 ~ a and -d == ~d + 1)
+
+ a = a << 32
+ b = b << 32
+ c = c << 32
+ d = d << 32
+ assert(a | b ~ c & d == 0xF4000000 << 32)
+ assert(~~a == a and ~a == -1 ~ a and -d == ~d + 1)
+
+ assert(-1 >> 1 == (1 << (numbits - 1)) - 1 and 1 << 31 == 0x80000000)
+ assert(-1 >> (numbits - 1) == 1)
+ assert(-1 >> numbits == 0 and
+ -1 >> -numbits == 0 and
+ -1 << numbits == 0 and
+ -1 << -numbits == 0)
+
+ assert((2^30 - 1) << 2^30 == 0)
+ assert((2^30 - 1) >> 2^30 == 0)
+
+ assert(1 >> -3 == 1 << 3 and 1000 >> 5 == 1000 << -5)
+
+
+ -- coercion from strings to integers
+ assert("0xffffffffffffffff" | 0 == -1)
+ assert("0xfffffffffffffffe" & "-1" == -2)
+ assert(" \\t-0xfffffffffffffffe\\n\\t" & "-1" == 2)
+ assert(" \\n -45 \\t " >> " -2 " == -45 * 4)
+
+ -- out of range number
+ assert(not pcall(function () return "0xffffffffffffffff.0" | 0 end))
+
+ -- embedded zeros
+ assert(not pcall(function () return "0xffffffffffffffff\\0" | 0 end))
+ `, L;
+
+ t.plan(2);
+
+ t.doesNotThrow(function () {
+
+ L = lauxlib.luaL_newstate();
+
+ lualib.luaL_openlibs(L);
+
+ lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+ }, "Lua program loaded without error");
+
+ t.doesNotThrow(function () {
+
+ lua.lua_call(L, 0, -1);
+
+ }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] bitwise: testing bitwise library", function (t) {
+ let luaCode = `
+ assert(bit32.band() == bit32.bnot(0))
+ assert(bit32.btest() == true)
+ assert(bit32.bor() == 0)
+ assert(bit32.bxor() == 0)
+
+ assert(bit32.band() == bit32.band(0xffffffff))
+ assert(bit32.band(1,2) == 0)
+ `, L;
+
+ t.plan(2);
+
+ t.doesNotThrow(function () {
+
+ L = lauxlib.luaL_newstate();
+
+ lualib.luaL_openlibs(L);
+
+ lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+ }, "Lua program loaded without error");
+
+ t.doesNotThrow(function () {
+
+ lua.lua_call(L, 0, -1);
+
+ }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] bitwise: out-of-range numbers", function (t) {
+ let luaCode = `
+ assert(bit32.band(-1) == 0xffffffff)
+ assert(bit32.band((1 << 33) - 1) == 0xffffffff)
+ assert(bit32.band(-(1 << 33) - 1) == 0xffffffff)
+ assert(bit32.band((1 << 33) + 1) == 1)
+ assert(bit32.band(-(1 << 33) + 1) == 1)
+ assert(bit32.band(-(1 << 40)) == 0)
+ assert(bit32.band(1 << 40) == 0)
+ assert(bit32.band(-(1 << 40) - 2) == 0xfffffffe)
+ assert(bit32.band((1 << 40) - 4) == 0xfffffffc)
+
+ assert(bit32.lrotate(0, -1) == 0)
+ assert(bit32.lrotate(0, 7) == 0)
+ assert(bit32.lrotate(0x12345678, 0) == 0x12345678)
+ assert(bit32.lrotate(0x12345678, 32) == 0x12345678)
+ assert(bit32.lrotate(0x12345678, 4) == 0x23456781)
+ assert(bit32.rrotate(0x12345678, -4) == 0x23456781)
+ assert(bit32.lrotate(0x12345678, -8) == 0x78123456)
+ assert(bit32.rrotate(0x12345678, 8) == 0x78123456)
+ assert(bit32.lrotate(0xaaaaaaaa, 2) == 0xaaaaaaaa)
+ assert(bit32.lrotate(0xaaaaaaaa, -2) == 0xaaaaaaaa)
+ for i = -50, 50 do
+ assert(bit32.lrotate(0x89abcdef, i) == bit32.lrotate(0x89abcdef, i%32))
+ end
+
+ assert(bit32.lshift(0x12345678, 4) == 0x23456780)
+ assert(bit32.lshift(0x12345678, 8) == 0x34567800)
+ assert(bit32.lshift(0x12345678, -4) == 0x01234567)
+ assert(bit32.lshift(0x12345678, -8) == 0x00123456)
+ assert(bit32.lshift(0x12345678, 32) == 0)
+ assert(bit32.lshift(0x12345678, -32) == 0)
+ assert(bit32.rshift(0x12345678, 4) == 0x01234567)
+ assert(bit32.rshift(0x12345678, 8) == 0x00123456)
+ assert(bit32.rshift(0x12345678, 32) == 0)
+ assert(bit32.rshift(0x12345678, -32) == 0)
+ assert(bit32.arshift(0x12345678, 0) == 0x12345678)
+ assert(bit32.arshift(0x12345678, 1) == 0x12345678 // 2)
+ assert(bit32.arshift(0x12345678, -1) == 0x12345678 * 2)
+ assert(bit32.arshift(-1, 1) == 0xffffffff)
+ assert(bit32.arshift(-1, 24) == 0xffffffff)
+ assert(bit32.arshift(-1, 32) == 0xffffffff)
+ assert(bit32.arshift(-1, -1) == bit32.band(-1 * 2, 0xffffffff))
+
+ assert(0x12345678 << 4 == 0x123456780)
+ assert(0x12345678 << 8 == 0x1234567800)
+ assert(0x12345678 << -4 == 0x01234567)
+ assert(0x12345678 << -8 == 0x00123456)
+ assert(0x12345678 << 32 == 0x1234567800000000)
+ assert(0x12345678 << -32 == 0)
+ assert(0x12345678 >> 4 == 0x01234567)
+ assert(0x12345678 >> 8 == 0x00123456)
+ assert(0x12345678 >> 32 == 0)
+ assert(0x12345678 >> -32 == 0x1234567800000000)
+ `, L;
+
+ t.plan(2);
+
+ t.doesNotThrow(function () {
+
+ L = lauxlib.luaL_newstate();
+
+ lualib.luaL_openlibs(L);
+
+ lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+ }, "Lua program loaded without error");
+
+ t.doesNotThrow(function () {
+
+ lua.lua_call(L, 0, -1);
+
+ }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] bitwise: some special cases", function (t) {
+ let luaCode = `
+ local c = {0, 1, 2, 3, 10, 0x80000000, 0xaaaaaaaa, 0x55555555,
+ 0xffffffff, 0x7fffffff}
+
+ for _, b in pairs(c) do
+ assert(bit32.band(b) == b)
+ assert(bit32.band(b, b) == b)
+ assert(bit32.band(b, b, b, b) == b)
+ assert(bit32.btest(b, b) == (b ~= 0))
+ assert(bit32.band(b, b, b) == b)
+ assert(bit32.band(b, b, b, ~b) == 0)
+ assert(bit32.btest(b, b, b) == (b ~= 0))
+ assert(bit32.band(b, bit32.bnot(b)) == 0)
+ assert(bit32.bor(b, bit32.bnot(b)) == bit32.bnot(0))
+ assert(bit32.bor(b) == b)
+ assert(bit32.bor(b, b) == b)
+ assert(bit32.bor(b, b, b) == b)
+ assert(bit32.bor(b, b, 0, ~b) == 0xffffffff)
+ assert(bit32.bxor(b) == b)
+ assert(bit32.bxor(b, b) == 0)
+ assert(bit32.bxor(b, b, b) == b)
+ assert(bit32.bxor(b, b, b, b) == 0)
+ assert(bit32.bxor(b, 0) == b)
+ assert(bit32.bnot(b) ~= b)
+ assert(bit32.bnot(bit32.bnot(b)) == b)
+ assert(bit32.bnot(b) == (1 << 32) - 1 - b)
+ assert(bit32.lrotate(b, 32) == b)
+ assert(bit32.rrotate(b, 32) == b)
+ assert(bit32.lshift(bit32.lshift(b, -4), 4) == bit32.band(b, bit32.bnot(0xf)))
+ assert(bit32.rshift(bit32.rshift(b, 4), -4) == bit32.band(b, bit32.bnot(0xf)))
+ end
+ `, L;
+
+ t.plan(2);
+
+ t.doesNotThrow(function () {
+
+ L = lauxlib.luaL_newstate();
+
+ lualib.luaL_openlibs(L);
+
+ lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+ }, "Lua program loaded without error");
+
+ t.doesNotThrow(function () {
+
+ lua.lua_call(L, 0, -1);
+
+ }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] bitwise: for this test, use at most 24 bits (mantissa of a single float)", function (t) {
+ let luaCode = `
+ c = {0, 1, 2, 3, 10, 0x800000, 0xaaaaaa, 0x555555, 0xffffff, 0x7fffff}
+ for _, b in pairs(c) do
+ for i = -40, 40 do
+ local x = bit32.lshift(b, i)
+ local y = math.floor(math.fmod(b * 2.0^i, 2.0^32))
+ assert(math.fmod(x - y, 2.0^32) == 0)
+ end
+ end
+
+ assert(not pcall(bit32.band, {}))
+ assert(not pcall(bit32.bnot, "a"))
+ assert(not pcall(bit32.lshift, 45))
+ assert(not pcall(bit32.lshift, 45, print))
+ assert(not pcall(bit32.rshift, 45, print))
+ `, L;
+
+ t.plan(2);
+
+ t.doesNotThrow(function () {
+
+ L = lauxlib.luaL_newstate();
+
+ lualib.luaL_openlibs(L);
+
+ lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+ }, "Lua program loaded without error");
+
+ t.doesNotThrow(function () {
+
+ lua.lua_call(L, 0, -1);
+
+ }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] bitwise: testing extract/replace", function (t) {
+ let luaCode = `
+ assert(bit32.extract(0x12345678, 0, 4) == 8)
+ assert(bit32.extract(0x12345678, 4, 4) == 7)
+ assert(bit32.extract(0xa0001111, 28, 4) == 0xa)
+ assert(bit32.extract(0xa0001111, 31, 1) == 1)
+ assert(bit32.extract(0x50000111, 31, 1) == 0)
+ assert(bit32.extract(0xf2345679, 0, 32) == 0xf2345679)
+
+ assert(not pcall(bit32.extract, 0, -1))
+ assert(not pcall(bit32.extract, 0, 32))
+ assert(not pcall(bit32.extract, 0, 0, 33))
+ assert(not pcall(bit32.extract, 0, 31, 2))
+
+ assert(bit32.replace(0x12345678, 5, 28, 4) == 0x52345678)
+ assert(bit32.replace(0x12345678, 0x87654321, 0, 32) == 0x87654321)
+ assert(bit32.replace(0, 1, 2) == 2^2)
+ assert(bit32.replace(0, -1, 4) == 2^4)
+ assert(bit32.replace(-1, 0, 31) == (1 << 31) - 1)
+ assert(bit32.replace(-1, 0, 1, 2) == (1 << 32) - 7)
+ `, L;
+
+ t.plan(2);
+
+ t.doesNotThrow(function () {
+
+ L = lauxlib.luaL_newstate();
+
+ lualib.luaL_openlibs(L);
+
+ lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+ }, "Lua program loaded without error");
+
+ t.doesNotThrow(function () {
+
+ lua.lua_call(L, 0, -1);
+
+ }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] bitwise: testing conversion of floats", function (t) {
+ let luaCode = `
+ assert(bit32.bor(3.0) == 3)
+ assert(bit32.bor(-4.0) == 0xfffffffc)
+ `, L;
+
+ t.plan(2);
+
+ t.doesNotThrow(function () {
+
+ L = lauxlib.luaL_newstate();
+
+ lualib.luaL_openlibs(L);
+
+ lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+ }, "Lua program loaded without error");
+
+ t.doesNotThrow(function () {
+
+ lua.lua_call(L, 0, -1);
+
+ }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] bitwise: large floats and large-enough integers?", function (t) {
+ let luaCode = `
+ if 2.0^50 < 2.0^50 + 1.0 and 2.0^50 < (-1 >> 1) then
+ assert(bit32.bor(2.0^32 - 5.0) == 0xfffffffb)
+ assert(bit32.bor(-2.0^32 - 6.0) == 0xfffffffa)
+ assert(bit32.bor(2.0^48 - 5.0) == 0xfffffffb)
+ assert(bit32.bor(-2.0^48 - 6.0) == 0xfffffffa)
+ end
+ `, L;
+
+ t.plan(2);
+
+ t.doesNotThrow(function () {
+
+ L = lauxlib.luaL_newstate();
+
+ lualib.luaL_openlibs(L);
+
+ lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+ }, "Lua program loaded without error");
+
+ t.doesNotThrow(function () {
+
+ lua.lua_call(L, 0, -1);
+
+ }, "Lua program ran without error");
+
+});