mirror of
https://github.com/walterschell/Lua.git
synced 2024-11-10 01:01:46 +00:00
512 lines
12 KiB
Lua
512 lines
12 KiB
Lua
-- $Id: testes/calls.lua $
|
|
-- See Copyright Notice in file all.lua
|
|
|
|
print("testing functions and calls")
|
|
|
|
local debug = require "debug"
|
|
|
|
-- get the opportunity to test 'type' too ;)
|
|
|
|
assert(type(1<2) == 'boolean')
|
|
assert(type(true) == 'boolean' and type(false) == 'boolean')
|
|
assert(type(nil) == 'nil'
|
|
and type(-3) == 'number'
|
|
and type'x' == 'string'
|
|
and type{} == 'table'
|
|
and type(type) == 'function')
|
|
|
|
assert(type(assert) == type(print))
|
|
local function f (x) return a:x (x) end
|
|
assert(type(f) == 'function')
|
|
assert(not pcall(type))
|
|
|
|
|
|
-- testing local-function recursion
|
|
fact = false
|
|
do
|
|
local res = 1
|
|
local function fact (n)
|
|
if n==0 then return res
|
|
else return n*fact(n-1)
|
|
end
|
|
end
|
|
assert(fact(5) == 120)
|
|
end
|
|
assert(fact == false)
|
|
fact = nil
|
|
|
|
-- testing declarations
|
|
local a = {i = 10}
|
|
local self = 20
|
|
function a:x (x) return x+self.i end
|
|
function a.y (x) return x+self end
|
|
|
|
assert(a:x(1)+10 == a.y(1))
|
|
|
|
a.t = {i=-100}
|
|
a["t"].x = function (self, a,b) return self.i+a+b end
|
|
|
|
assert(a.t:x(2,3) == -95)
|
|
|
|
do
|
|
local a = {x=0}
|
|
function a:add (x) self.x, a.y = self.x+x, 20; return self end
|
|
assert(a:add(10):add(20):add(30).x == 60 and a.y == 20)
|
|
end
|
|
|
|
local a = {b={c={}}}
|
|
|
|
function a.b.c.f1 (x) return x+1 end
|
|
function a.b.c:f2 (x,y) self[x] = y end
|
|
assert(a.b.c.f1(4) == 5)
|
|
a.b.c:f2('k', 12); assert(a.b.c.k == 12)
|
|
|
|
print('+')
|
|
|
|
t = nil -- 'declare' t
|
|
function f(a,b,c) local d = 'a'; t={a,b,c,d} end
|
|
|
|
f( -- this line change must be valid
|
|
1,2)
|
|
assert(t[1] == 1 and t[2] == 2 and t[3] == nil and t[4] == 'a')
|
|
f(1,2, -- this one too
|
|
3,4)
|
|
assert(t[1] == 1 and t[2] == 2 and t[3] == 3 and t[4] == 'a')
|
|
|
|
t = nil -- delete 't'
|
|
|
|
function fat(x)
|
|
if x <= 1 then return 1
|
|
else return x*load("return fat(" .. x-1 .. ")", "")()
|
|
end
|
|
end
|
|
|
|
assert(load "load 'assert(fat(6)==720)' () ")()
|
|
a = load('return fat(5), 3')
|
|
local a,b = a()
|
|
assert(a == 120 and b == 3)
|
|
fat = nil
|
|
print('+')
|
|
|
|
local function err_on_n (n)
|
|
if n==0 then error(); exit(1);
|
|
else err_on_n (n-1); exit(1);
|
|
end
|
|
end
|
|
|
|
do
|
|
local function dummy (n)
|
|
if n > 0 then
|
|
assert(not pcall(err_on_n, n))
|
|
dummy(n-1)
|
|
end
|
|
end
|
|
|
|
dummy(10)
|
|
end
|
|
|
|
_G.deep = nil -- "declaration" (used by 'all.lua')
|
|
|
|
function deep (n)
|
|
if n>0 then deep(n-1) end
|
|
end
|
|
deep(10)
|
|
deep(180)
|
|
|
|
|
|
print"testing tail calls"
|
|
|
|
function deep (n) if n>0 then return deep(n-1) else return 101 end end
|
|
assert(deep(30000) == 101)
|
|
a = {}
|
|
function a:deep (n) if n>0 then return self:deep(n-1) else return 101 end end
|
|
assert(a:deep(30000) == 101)
|
|
|
|
do -- tail calls x varargs
|
|
local function foo (x, ...) local a = {...}; return x, a[1], a[2] end
|
|
|
|
local function foo1 (x) return foo(10, x, x + 1) end
|
|
|
|
local a, b, c = foo1(-2)
|
|
assert(a == 10 and b == -2 and c == -1)
|
|
|
|
-- tail calls x metamethods
|
|
local t = setmetatable({}, {__call = foo})
|
|
local function foo2 (x) return t(10, x) end
|
|
a, b, c = foo2(100)
|
|
assert(a == t and b == 10 and c == 100)
|
|
|
|
a, b = (function () return foo() end)()
|
|
assert(a == nil and b == nil)
|
|
|
|
local X, Y, A
|
|
local function foo (x, y, ...) X = x; Y = y; A = {...} end
|
|
local function foo1 (...) return foo(...) end
|
|
|
|
local a, b, c = foo1()
|
|
assert(X == nil and Y == nil and #A == 0)
|
|
|
|
a, b, c = foo1(10)
|
|
assert(X == 10 and Y == nil and #A == 0)
|
|
|
|
a, b, c = foo1(10, 20)
|
|
assert(X == 10 and Y == 20 and #A == 0)
|
|
|
|
a, b, c = foo1(10, 20, 30)
|
|
assert(X == 10 and Y == 20 and #A == 1 and A[1] == 30)
|
|
end
|
|
|
|
|
|
do -- C-stack overflow while handling C-stack overflow
|
|
local function loop ()
|
|
assert(pcall(loop))
|
|
end
|
|
|
|
local err, msg = xpcall(loop, loop)
|
|
assert(not err and string.find(msg, "error"))
|
|
end
|
|
|
|
|
|
|
|
do -- tail calls x chain of __call
|
|
local n = 10000 -- depth
|
|
|
|
local function foo ()
|
|
if n == 0 then return 1023
|
|
else n = n - 1; return foo()
|
|
end
|
|
end
|
|
|
|
-- build a chain of __call metamethods ending in function 'foo'
|
|
for i = 1, 100 do
|
|
foo = setmetatable({}, {__call = foo})
|
|
end
|
|
|
|
-- call the first one as a tail call in a new coroutine
|
|
-- (to ensure stack is not preallocated)
|
|
assert(coroutine.wrap(function() return foo() end)() == 1023)
|
|
end
|
|
|
|
print('+')
|
|
|
|
|
|
do -- testing chains of '__call'
|
|
local N = 20
|
|
local u = table.pack
|
|
for i = 1, N do
|
|
u = setmetatable({i}, {__call = u})
|
|
end
|
|
|
|
local Res = u("a", "b", "c")
|
|
|
|
assert(Res.n == N + 3)
|
|
for i = 1, N do
|
|
assert(Res[i][1] == i)
|
|
end
|
|
assert(Res[N + 1] == "a" and Res[N + 2] == "b" and Res[N + 3] == "c")
|
|
end
|
|
|
|
|
|
a = nil
|
|
(function (x) a=x end)(23)
|
|
assert(a == 23 and (function (x) return x*2 end)(20) == 40)
|
|
|
|
|
|
-- testing closures
|
|
|
|
-- fixed-point operator
|
|
local Z = function (le)
|
|
local function a (f)
|
|
return le(function (x) return f(f)(x) end)
|
|
end
|
|
return a(a)
|
|
end
|
|
|
|
|
|
-- non-recursive factorial
|
|
|
|
local F = function (f)
|
|
return function (n)
|
|
if n == 0 then return 1
|
|
else return n*f(n-1) end
|
|
end
|
|
end
|
|
|
|
local fat = Z(F)
|
|
|
|
assert(fat(0) == 1 and fat(4) == 24 and Z(F)(5)==5*Z(F)(4))
|
|
|
|
local function g (z)
|
|
local function f (a,b,c,d)
|
|
return function (x,y) return a+b+c+d+a+x+y+z end
|
|
end
|
|
return f(z,z+1,z+2,z+3)
|
|
end
|
|
|
|
local f = g(10)
|
|
assert(f(9, 16) == 10+11+12+13+10+9+16+10)
|
|
|
|
print('+')
|
|
|
|
-- testing multiple returns
|
|
|
|
local function unlpack (t, i)
|
|
i = i or 1
|
|
if (i <= #t) then
|
|
return t[i], unlpack(t, i+1)
|
|
end
|
|
end
|
|
|
|
local function equaltab (t1, t2)
|
|
assert(#t1 == #t2)
|
|
for i = 1, #t1 do
|
|
assert(t1[i] == t2[i])
|
|
end
|
|
end
|
|
|
|
local pack = function (...) return (table.pack(...)) end
|
|
|
|
local function f() return 1,2,30,4 end
|
|
local function ret2 (a,b) return a,b end
|
|
|
|
local a,b,c,d = unlpack{1,2,3}
|
|
assert(a==1 and b==2 and c==3 and d==nil)
|
|
a = {1,2,3,4,false,10,'alo',false,assert}
|
|
equaltab(pack(unlpack(a)), a)
|
|
equaltab(pack(unlpack(a), -1), {1,-1})
|
|
a,b,c,d = ret2(f()), ret2(f())
|
|
assert(a==1 and b==1 and c==2 and d==nil)
|
|
a,b,c,d = unlpack(pack(ret2(f()), ret2(f())))
|
|
assert(a==1 and b==1 and c==2 and d==nil)
|
|
a,b,c,d = unlpack(pack(ret2(f()), (ret2(f()))))
|
|
assert(a==1 and b==1 and c==nil and d==nil)
|
|
|
|
a = ret2{ unlpack{1,2,3}, unlpack{3,2,1}, unlpack{"a", "b"}}
|
|
assert(a[1] == 1 and a[2] == 3 and a[3] == "a" and a[4] == "b")
|
|
|
|
|
|
-- testing calls with 'incorrect' arguments
|
|
rawget({}, "x", 1)
|
|
rawset({}, "x", 1, 2)
|
|
assert(math.sin(1,2) == math.sin(1))
|
|
table.sort({10,9,8,4,19,23,0,0}, function (a,b) return a<b end, "extra arg")
|
|
|
|
|
|
-- test for generic load
|
|
local x = "-- a comment\0\0\0\n x = 10 + \n23; \
|
|
local a = function () x = 'hi' end; \
|
|
return '\0'"
|
|
local function read1 (x)
|
|
local i = 0
|
|
return function ()
|
|
collectgarbage()
|
|
i=i+1
|
|
return string.sub(x, i, i)
|
|
end
|
|
end
|
|
|
|
local function cannotload (msg, a,b)
|
|
assert(not a and string.find(b, msg))
|
|
end
|
|
|
|
a = assert(load(read1(x), "modname", "t", _G))
|
|
assert(a() == "\0" and _G.x == 33)
|
|
assert(debug.getinfo(a).source == "modname")
|
|
-- cannot read text in binary mode
|
|
cannotload("attempt to load a text chunk", load(read1(x), "modname", "b", {}))
|
|
cannotload("attempt to load a text chunk", load(x, "modname", "b"))
|
|
|
|
a = assert(load(function () return nil end))
|
|
a() -- empty chunk
|
|
|
|
assert(not load(function () return true end))
|
|
|
|
|
|
-- small bug
|
|
local t = {nil, "return ", "3"}
|
|
f, msg = load(function () return table.remove(t, 1) end)
|
|
assert(f() == nil) -- should read the empty chunk
|
|
|
|
-- another small bug (in 5.2.1)
|
|
f = load(string.dump(function () return 1 end), nil, "b", {})
|
|
assert(type(f) == "function" and f() == 1)
|
|
|
|
|
|
do -- another bug (in 5.4.0)
|
|
-- loading a binary long string interrupted by GC cycles
|
|
local f = string.dump(function ()
|
|
return '01234567890123456789012345678901234567890123456789'
|
|
end)
|
|
f = load(read1(f))
|
|
assert(f() == '01234567890123456789012345678901234567890123456789')
|
|
end
|
|
|
|
|
|
do -- another bug (since 5.2)
|
|
-- corrupted binary dump: list of upvalue names is larger than number
|
|
-- of upvalues, overflowing the array of upvalues.
|
|
local code =
|
|
"\x1b\x4c\x75\x61\x54\x00\x19\x93\x0d\x0a\x1a\x0a\x04\x08\x08\x78\x56\z
|
|
\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x28\x77\x40\x00\x86\x40\z
|
|
\x74\x65\x6d\x70\x81\x81\x01\x00\x02\x82\x48\x00\x02\x00\xc7\x00\x01\z
|
|
\x00\x80\x80\x80\x82\x00\x00\x80\x81\x82\x78\x80\x82\x81\x86\x40\x74\z
|
|
\x65\x6d\x70"
|
|
|
|
assert(load(code)) -- segfaults in previous versions
|
|
end
|
|
|
|
|
|
x = string.dump(load("x = 1; return x"))
|
|
a = assert(load(read1(x), nil, "b"))
|
|
assert(a() == 1 and _G.x == 1)
|
|
cannotload("attempt to load a binary chunk", load(read1(x), nil, "t"))
|
|
cannotload("attempt to load a binary chunk", load(x, nil, "t"))
|
|
_G.x = nil
|
|
|
|
assert(not pcall(string.dump, print)) -- no dump of C functions
|
|
|
|
cannotload("unexpected symbol", load(read1("*a = 123")))
|
|
cannotload("unexpected symbol", load("*a = 123"))
|
|
cannotload("hhi", load(function () error("hhi") end))
|
|
|
|
-- any value is valid for _ENV
|
|
assert(load("return _ENV", nil, nil, 123)() == 123)
|
|
|
|
|
|
-- load when _ENV is not first upvalue
|
|
local x; XX = 123
|
|
local function h ()
|
|
local y=x -- use 'x', so that it becomes 1st upvalue
|
|
return XX -- global name
|
|
end
|
|
local d = string.dump(h)
|
|
x = load(d, "", "b")
|
|
assert(debug.getupvalue(x, 2) == '_ENV')
|
|
debug.setupvalue(x, 2, _G)
|
|
assert(x() == 123)
|
|
|
|
assert(assert(load("return XX + ...", nil, nil, {XX = 13}))(4) == 17)
|
|
XX = nil
|
|
|
|
-- test generic load with nested functions
|
|
x = [[
|
|
return function (x)
|
|
return function (y)
|
|
return function (z)
|
|
return x+y+z
|
|
end
|
|
end
|
|
end
|
|
]]
|
|
a = assert(load(read1(x), "read", "t"))
|
|
assert(a()(2)(3)(10) == 15)
|
|
|
|
-- repeat the test loading a binary chunk
|
|
x = string.dump(a)
|
|
a = assert(load(read1(x), "read", "b"))
|
|
assert(a()(2)(3)(10) == 15)
|
|
|
|
|
|
-- test for dump/undump with upvalues
|
|
local a, b = 20, 30
|
|
x = load(string.dump(function (x)
|
|
if x == "set" then a = 10+b; b = b+1 else
|
|
return a
|
|
end
|
|
end), "", "b", nil)
|
|
assert(x() == nil)
|
|
assert(debug.setupvalue(x, 1, "hi") == "a")
|
|
assert(x() == "hi")
|
|
assert(debug.setupvalue(x, 2, 13) == "b")
|
|
assert(not debug.setupvalue(x, 3, 10)) -- only 2 upvalues
|
|
x("set")
|
|
assert(x() == 23)
|
|
x("set")
|
|
assert(x() == 24)
|
|
|
|
-- test for dump/undump with many upvalues
|
|
do
|
|
local nup = 200 -- maximum number of local variables
|
|
local prog = {"local a1"}
|
|
for i = 2, nup do prog[#prog + 1] = ", a" .. i end
|
|
prog[#prog + 1] = " = 1"
|
|
for i = 2, nup do prog[#prog + 1] = ", " .. i end
|
|
local sum = 1
|
|
prog[#prog + 1] = "; return function () return a1"
|
|
for i = 2, nup do prog[#prog + 1] = " + a" .. i; sum = sum + i end
|
|
prog[#prog + 1] = " end"
|
|
prog = table.concat(prog)
|
|
local f = assert(load(prog))()
|
|
assert(f() == sum)
|
|
|
|
f = load(string.dump(f)) -- main chunk now has many upvalues
|
|
local a = 10
|
|
local h = function () return a end
|
|
for i = 1, nup do
|
|
debug.upvaluejoin(f, i, h, 1)
|
|
end
|
|
assert(f() == 10 * nup)
|
|
end
|
|
|
|
-- test for long method names
|
|
do
|
|
local t = {x = 1}
|
|
function t:_012345678901234567890123456789012345678901234567890123456789 ()
|
|
return self.x
|
|
end
|
|
assert(t:_012345678901234567890123456789012345678901234567890123456789() == 1)
|
|
end
|
|
|
|
|
|
-- test for bug in parameter adjustment
|
|
assert((function () return nil end)(4) == nil)
|
|
assert((function () local a; return a end)(4) == nil)
|
|
assert((function (a) return a end)() == nil)
|
|
|
|
|
|
print("testing binary chunks")
|
|
do
|
|
local header = string.pack("c4BBc6BBB",
|
|
"\27Lua", -- signature
|
|
0x54, -- version 5.4 (0x54)
|
|
0, -- format
|
|
"\x19\x93\r\n\x1a\n", -- data
|
|
4, -- size of instruction
|
|
string.packsize("j"), -- sizeof(lua integer)
|
|
string.packsize("n") -- sizeof(lua number)
|
|
)
|
|
local c = string.dump(function ()
|
|
local a = 1; local b = 3;
|
|
local f = function () return a + b + _ENV.c; end -- upvalues
|
|
local s1 = "a constant"
|
|
local s2 = "another constant"
|
|
return a + b * 3
|
|
end)
|
|
|
|
assert(assert(load(c))() == 10)
|
|
|
|
-- check header
|
|
assert(string.sub(c, 1, #header) == header)
|
|
-- check LUAC_INT and LUAC_NUM
|
|
local ci, cn = string.unpack("jn", c, #header + 1)
|
|
assert(ci == 0x5678 and cn == 370.5)
|
|
|
|
-- corrupted header
|
|
for i = 1, #header do
|
|
local s = string.sub(c, 1, i - 1) ..
|
|
string.char(string.byte(string.sub(c, i, i)) + 1) ..
|
|
string.sub(c, i + 1, -1)
|
|
assert(#s == #c)
|
|
assert(not load(s))
|
|
end
|
|
|
|
-- loading truncated binary chunks
|
|
for i = 1, #c - 1 do
|
|
local st, msg = load(string.sub(c, 1, i))
|
|
assert(not st and string.find(msg, "truncated"))
|
|
end
|
|
end
|
|
|
|
print('OK')
|
|
return deep
|