luau/tests/conformance/tables.lua

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-- This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
-- This file is based on Lua 5.x tests -- https://github.com/lua/lua/tree/master/testes
print('testing tables, next, and for')
local unpack = table.unpack
-- testing table.insert return value
assert(select('#', table.insert({}, 42)) == 0)
local a = {}
-- make sure table has lots of space in hash part
for i=1,100 do a[i.."+"] = true end
for i=1,100 do a[i.."+"] = nil end
-- fill hash part with numeric indices testing size operator
for i=1,100 do
a[i] = true
assert(#a == i)
end
if T then
-- testing table sizes
local l2 = math.log(2)
local function log2 (x) return math.log(x)/l2 end
local function mp2 (n) -- minimum power of 2 >= n
local mp = 2^math.ceil(log2(n))
assert(n == 0 or (mp/2 < n and n <= mp))
return mp
end
local function fb (n)
local r, nn = T.int2fb(n)
assert(r < 256)
return nn
end
-- test fb function
local a = 1
local lim = 2^30
while a < lim do
local n = fb(a)
assert(a <= n and n <= a*1.125)
a = math.ceil(a*1.3)
end
local function check (t, na, nh)
local a, h = T.querytab(t)
if a ~= na or h ~= nh then
print(na, nh, a, h)
assert(nil)
end
end
-- testing constructor sizes
local lim = 40
local s = 'return {'
for i=1,lim do
s = s..i..','
local s = s
for k=0,lim do
local t = loadstring(s..'}')()
assert(#t == i)
check(t, fb(i), mp2(k))
s = string.format('%sa%d=%d,', s, k, k)
end
end
-- tests with unknown number of elements
local a = {}
for i=1,lim do a[i] = i end -- build auxiliary table
for k=0,lim do
local a = {unpack(a,1,k)}
assert(#a == k)
check(a, k, 0)
a = {1,2,3,unpack(a,1,k)}
check(a, k+3, 0)
assert(#a == k + 3)
end
print'+'
-- testing tables dynamically built
local lim = 130
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do
local a = {}; a[2] = 1; check(a, 0, 1)
a = {}; a[0] = 1; check(a, 0, 1); a[2] = 1; check(a, 0, 2)
a = {}; a[0] = 1; a[1] = 1; check(a, 1, 1)
a = {}
for i = 1,lim do
a[i] = 1
assert(#a == i)
check(a, mp2(i), 0)
end
end
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do
local a = {}
for i = 1,lim do
a['a'..i] = 1
assert(#a == 0)
check(a, 0, mp2(i))
end
end
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do
local a = {}
for i=1,16 do a[i] = i end
check(a, 16, 0)
for i=1,11 do a[i] = nil end
for i=30,40 do a[i] = nil end -- force a rehash (?)
check(a, 0, 8)
a[10] = 1
for i=30,40 do a[i] = nil end -- force a rehash (?)
check(a, 0, 8)
for i=1,14 do a[i] = nil end
for i=30,50 do a[i] = nil end -- force a rehash (?)
check(a, 0, 4)
end
do -- rehash moving elements from array to hash
local a = {}
for i = 1, 100 do a[i] = i end
check(a, 128, 0)
for i = 5, 95 do a[i] = nil end
check(a, 128, 0)
a.x = 1 -- force a re-hash
check(a, 4, 8)
for i = 1, 4 do assert(a[i] == i) end
for i = 5, 95 do assert(a[i] == nil) end
for i = 96, 100 do assert(a[i] == i) end
assert(a.x == 1)
end
-- reverse filling
for i=1,lim do
local a = {}
for i=i,1,-1 do a[i] = i end -- fill in reverse
check(a, mp2(i), 0)
end
-- size tests for vararg
lim = 35
function foo (n, ...)
local arg = {...}
check(arg, n, 0)
assert(select('#', ...) == n)
arg[n+1] = true
check(arg, mp2(n+1), 0)
arg.x = true
check(arg, mp2(n+1), 1)
end
local a = {}
for i=1,lim do a[i] = true; foo(i, unpack(a)) end
end
-- test size operation on empty tables
assert(#{} == 0)
assert(#{nil} == 0)
assert(#{nil, nil} == 0)
assert(#{nil, nil, nil} == 0)
assert(#{nil, nil, nil, nil} == 0)
print'+'
local nofind = {}
a,b,c = 1,2,3
a,b,c = nil
local function find (name)
local n,v
while 1 do
n,v = next(_G, n)
if not n then return nofind end
assert(v ~= nil)
if n == name then return v end
end
end
local function find1 (name)
for n,v in pairs(_G) do
if n==name then return v end
end
return nil -- not found
end
do -- create 10000 new global variables
for i=1,10000 do _G[i] = i end
end
a = {x=90, y=8, z=23}
assert(table.foreach(a, function(i,v) if i=='x' then return v end end) == 90)
assert(table.foreach(a, function(i,v) if i=='a' then return v end end) == nil)
table.foreach({}, error)
table.foreachi({x=10, y=20}, error)
local a = {n = 1}
table.foreachi({n=3}, function (i, v)
assert(a.n == i and not v)
a.n=a.n+1
end)
a = {10,20,30,nil,50}
table.foreachi(a, function (i,v) assert(a[i] == v) end)
assert(table.foreachi({'a', 'b', 'c'}, function (i,v)
if i==2 then return v end
end) == 'b')
-- assert(print==find("print") and print == find1("print"))
-- assert(_G["print"]==find("print"))
-- assert(assert==find1("assert"))
assert(nofind==find("return"))
assert(not find1("return"))
_G["ret" .. "urn"] = nil
assert(nofind==find("return"))
_G["xxx"] = 1
-- assert(xxx==find("xxx"))
print('+')
a = {}
for i=0,10000 do
if i % 10 ~= 0 then
a['x'..i] = i
end
end
n = {n=0}
for i,v in pairs(a) do
n.n = n.n+1
assert(i and v and a[i] == v)
end
assert(n.n == 9000)
a = nil
-- remove those 10000 new global variables
for i=1,10000 do _G[i] = nil end
do -- clear global table
local a = {}
local preserve = {io = 1, string = 1, debug = 1, os = 1,
coroutine = 1, table = 1, math = 1}
for n,v in pairs(_G) do a[n]=v end
for n,v in pairs(a) do
if not preserve[n] and type(v) ~= "function" and
not string.find(n, "^[%u_]") then
_G[n] = nil
end
collectgarbage()
end
end
local function foo ()
local getfenv, setfenv, assert, next =
getfenv, setfenv, assert, next
local n = {gl1=3}
setfenv(foo, n)
assert(getfenv(foo) == getfenv(1))
assert(getfenv(foo) == n)
assert(print == nil and gl1 == 3)
gl1 = nil
gl = 1
assert(n.gl == 1 and next(n, 'gl') == nil)
end
foo()
print'+'
local function checknext (a)
local b = {}
table.foreach(a, function (k,v) b[k] = v end)
for k,v in pairs(b) do assert(a[k] == v) end
for k,v in pairs(a) do assert(b[k] == v) end
b = {}
do local k,v = next(a); while k do b[k] = v; k,v = next(a,k) end end
for k,v in pairs(b) do assert(a[k] == v) end
for k,v in pairs(a) do assert(b[k] == v) end
end
checknext{1,x=1,y=2,z=3}
checknext{1,2,x=1,y=2,z=3}
checknext{1,2,3,x=1,y=2,z=3}
checknext{1,2,3,4,x=1,y=2,z=3}
checknext{1,2,3,4,5,x=1,y=2,z=3}
assert(table.getn{} == 0)
assert(table.getn{[-1] = 2} == 0)
assert(table.getn{1,2,3,nil,nil} == 3)
for i=0,40 do
local a = {}
for j=1,i do a[j]=j end
assert(table.getn(a) == i)
end
assert(table.maxn{} == 0)
assert(table.maxn{["1000"] = true} == 0)
assert(table.maxn{["1000"] = true, [24.5] = 3} == 24.5)
assert(table.maxn{[1000] = true} == 1000)
assert(table.maxn{[10] = true, [100*math.pi] = print} == 100*math.pi)
-- int overflow
a = {}
for i=0,50 do a[math.pow(2,i)] = true end
assert(a[table.getn(a)])
print("+")
-- erasing values
local t = {[{1}] = 1, [{2}] = 2, [string.rep("x ", 4)] = 3,
[100.3] = 4, [4] = 5}
local n = 0
for k, v in pairs( t ) do
n = n+1
assert(t[k] == v)
t[k] = nil
collectgarbage()
assert(t[k] == nil)
end
assert(n == 5)
local function test (a)
table.insert(a, 10); table.insert(a, 2, 20);
table.insert(a, 1, -1); table.insert(a, 40);
table.insert(a, table.getn(a)+1, 50)
table.insert(a, 2, -2)
assert(table.remove(a,1) == -1)
assert(table.remove(a,1) == -2)
assert(table.remove(a,1) == 10)
assert(table.remove(a,1) == 20)
assert(table.remove(a,1) == 40)
assert(table.remove(a,1) == 50)
assert(table.remove(a,1) == nil)
end
a = {n=0, [-7] = "ban"}
test(a)
assert(a.n == 0 and a[-7] == "ban")
a = {[-7] = "ban"};
test(a)
assert(a.n == nil and table.getn(a) == 0 and a[-7] == "ban")
table.insert(a, 1, 10); table.insert(a, 1, 20); table.insert(a, 1, -1)
assert(table.remove(a) == 10)
assert(table.remove(a) == 20)
assert(table.remove(a) == -1)
a = {'c', 'd'}
table.insert(a, 3, 'a')
table.insert(a, 'b')
assert(table.remove(a, 1) == 'c')
assert(table.remove(a, 1) == 'd')
assert(table.remove(a, 1) == 'a')
assert(table.remove(a, 1) == 'b')
assert(table.getn(a) == 0 and a.n == nil)
print("+")
-- out of range insertion
a = {1, 2, 3}
table.insert(a, 0, 0)
assert(a[0] == 0 and table.concat(a) == "123")
table.insert(a, 10, 10)
assert(a[0] == 0 and table.concat(a) == "123" and table.maxn(a) == 10 and a[10] == 10)
table.insert(a, -10^9, 42)
assert(a[0] == 0 and table.concat(a) == "123" and table.maxn(a) == 10 and a[10] == 10 and a[-10^9] == 42)
table.insert(a, 0 / 0, 42) -- platform-dependent behavior atm so hard to validate
a = {}
for i=1,1000 do
a[i] = i; a[i-1] = nil
end
assert(next(a,nil) == 1000 and next(a,1000) == nil)
assert(next({}) == nil)
assert(next({}, nil) == nil)
-- testing table.create and table.find
do
local t = table.create(5)
assert(#t == 0) -- filled with nil!
t[5] = 5
assert(#t == 5) -- magic
local t2 = table.create(5, "nice")
assert(table.concat(t2,"!") == "nice!nice!nice!nice!nice")
assert(table.find(t2, "nice") == 1)
assert(table.find(t2, "nice", 5) == 5)
assert(table.find(t2, "nice", 6) == nil)
assert(table.find({false, true}, true) == 2)
-- make sure table.find checks the hash portion as well by constructing a table literal that forces the value into the hash part
assert(table.find({[(1)] = true}, true) == 1)
end
-- test indexing with strings that have zeroes embedded in them
do
local t = {}
t['start\0end'] = 1
t['start'] = 2
assert(t['start\0end'] == 1)
assert(t['start'] == 2)
end
-- test table freezing
do
local t = {}
assert(not table.isfrozen(t))
t[1] = 1
t.a = 2
-- basic freeze test to validate invariants
assert(table.freeze(t) == t)
assert(table.isfrozen(t))
assert(not pcall(rawset, t, 1, 2))
assert(not pcall(rawset, t, "a", 2))
assert(not pcall(function() t.a = 3 end))
assert(not pcall(function() t[1] = 3 end))
assert(not pcall(setmetatable, t, {}))
assert(not pcall(table.freeze, t)) -- already frozen
-- can't freeze tables with protected metatable
local t = {}
setmetatable(t, { __metatable = "nope" })
assert(not pcall(table.freeze, t))
assert(not table.isfrozen(t))
-- note that it's valid to freeze a table with a metatable and protect it later, freeze doesn't freeze metatable automatically
local mt = {}
local t = setmetatable({}, mt)
table.freeze(t)
mt.__metatable = "nope"
assert(table.isfrozen(t))
assert(getmetatable(t) == "nope")
end
-- test #t
do
local t = table.create(10, 1)
assert(#t == 10)
t[5] = nil
assert(#t == 10)
t[10] = nil
assert(#t == 9)
t[9] = nil
t[8] = nil
assert(#t == 7)
t = table.create(10)
assert(#t == 0)
t[1] = 1
assert(#t == 1)
t[2] = 1
assert(#t == 2)
t[3] = 1
t[4] = 1
assert(#t == 4)
t = table.create(10)
assert(#t == 0)
table.insert(t, 1)
assert(#t == 1)
table.insert(t, 1)
assert(#t == 2)
table.insert(t, 1)
table.insert(t, 1)
assert(#t == 4)
t = table.create(10, 1)
assert(#t == 10)
table.remove(t)
assert(#t == 9)
table.remove(t)
table.remove(t)
assert(#t == 7)
end
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-- test clone
do
local t = {a = 1, b = 2, 3, 4, 5}
local tt = table.clone(t)
assert(#tt == 3)
assert(tt.a == 1 and tt.b == 2)
t.c = 3
assert(tt.c == nil)
t = table.freeze({"test"})
tt = table.clone(t)
assert(table.isfrozen(t) and not table.isfrozen(tt))
t = setmetatable({}, {})
tt = table.clone(t)
assert(getmetatable(t) == getmetatable(tt))
t = setmetatable({}, {__metatable = "protected"})
assert(not pcall(table.clone, t))
function order(t)
local r = ''
for k,v in pairs(t) do
r ..= tostring(v)
end
return v
end
t = {a = 1, b = 2, c = 3, d = 4, e = 5, f = 6}
tt = table.clone(t)
assert(order(t) == order(tt))
assert(not pcall(table.clone))
assert(not pcall(table.clone, 42))
end
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-- test boundary invariant maintenance during rehash
do
local arr = table.create(5, 42)
arr[1] = nil
arr.a = 'a' -- trigger rehash
assert(#arr == 5) -- technically 0 is also valid, but it happens to be 5 because array capacity is 5
end
-- test boundary invariant maintenance when replacing hash keys
do
local arr = {}
arr.a = 'a'
arr.a = nil
arr[1] = 1 -- should rehash and resize array part, otherwise # won't find the boundary in array part
assert(#arr == 1)
end
-- test boundary invariant maintenance when table is filled from the end
do
local arr = {}
for i=5,2,-1 do
arr[i] = i
assert(#arr == 0)
end
arr[1] = 1
assert(#arr == 5)
end
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-- test boundary invariant maintenance when table is filled using SETLIST opcode
do
local arr = {[2]=2,1}
assert(#arr == 2)
end
-- test boundary invariant maintenance when table is filled using table.move
do
local t1 = {1, 2, 3, 4, 5}
local t2 = {[6] = 6}
table.move(t1, 1, 5, 1, t2)
assert(#t2 == 6)
end
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-- test boundary invariant in sparse arrays or various kinds
do
local function obscuredalloc() return {} end
local bits = 16
for i = 1, 2^bits - 1 do
local t1 = obscuredalloc() -- to avoid NEWTABLE guessing correct size
for k = 1, bits do
t1[k] = if bit32.extract(i, k - 1) == 1 then true else nil
end
end
end
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-- test table.unpack fastcall for rejecting large unpacks
do
local ok, res = pcall(function()
local a = table.create(7999, 0)
local b = table.create(8000, 0)
local at = { table.unpack(a) }
local bt = { table.unpack(b) }
end)
assert(not ok)
end
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-- test iteration with lightuserdata keys
do
function countud()
local t = {}
t[makelud(1)] = 1
t[makelud(2)] = 2
local count = 0
for k,v in pairs(t) do
count += v
end
return count
end
assert(countud() == 3)
end
-- test iteration with lightuserdata keys with a substituted environment
do
local env = { makelud = makelud, pairs = pairs }
setfenv(countud, env)
assert(countud() == 3)
end
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-- test __newindex-as-a-table indirection: this had memory safety bugs in Lua 5.1.0
do
local hit = false
local grandparent = {}
grandparent.__newindex = function(s,k,v)
assert(k == "foo" and v == 10)
hit = true
end
local parent = {}
parent.__newindex = parent
setmetatable(parent, grandparent)
local child = setmetatable({}, parent)
child.foo = 10
assert(hit and child.foo == nil and parent.foo == nil)
end
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-- testing next x GC of deleted keys
do
local co = coroutine.wrap(function (t)
for k, v in pairs(t) do
local k1 = next(t) -- all previous keys were deleted
assert(k == k1) -- current key is the first in the table
t[k] = nil
local expected = (type(k) == "table" and k[1] or
type(k) == "function" and k() or
string.sub(k, 1, 1))
assert(expected == v)
coroutine.yield(v)
end
end)
local t = {}
t[{1}] = 1 -- add several unanchored, collectable keys
t[{2}] = 2
t[string.rep("a", 50)] = "a" -- long string
t[string.rep("b", 50)] = "b"
t[{3}] = 3
t[string.rep("c", 10)] = "c" -- short string
t[function () return 10 end] = 10
local count = 7
while co(t) do
collectgarbage("collect") -- collect dead keys
count = count - 1
end
assert(count == 0 and next(t) == nil) -- traversed the whole table
end
-- test error cases for table functions
do
assert(pcall(table.insert, {}) == false)
assert(pcall(table.insert, {}, 1, 2, 3) == false)
assert(pcall(table.insert, table.freeze({1, 2, 3}), 4) == false)
assert(pcall(table.insert, table.freeze({1, 2, 3}), 1, 4) == false)
assert(pcall(table.remove, table.freeze({1})) == false)
assert(pcall(table.concat, {true}) == false)
assert(pcall(table.create) == false)
assert(pcall(table.create, -1) == false)
assert(pcall(table.create, 1e9) == false)
assert(pcall(table.find, {}, 42, 0) == false)
assert(pcall(table.clear, table.freeze({})) == false)
end
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-- check that namecall lookup doesn't give up on entries missing from cached slot position
do
for i = 1,10 do
local t = setmetatable({}, { __index = { foo = 1 }})
assert(t.foo == 1)
t[-i] = 2
t.foo = function(t, i) return -i end
assert(t:foo(i) == -i)
end
end
return"OK"