412 lines
13 KiB
Lua
412 lines
13 KiB
Lua
-- This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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-- This file is based on Lua 5.x tests -- https://github.com/lua/lua/tree/master/testes
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print("testing errors")
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function doit (s)
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local f, msg = loadstring(s)
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if f == nil then return msg end
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local cond, msg = pcall(f)
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return (not cond) and msg
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end
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function checkmessage (prog, msg)
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-- assert(string.find(doit(prog), msg, 1, true))
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end
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function checksyntax (prog, extra, token, line)
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local msg = doit(prog)
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token = string.gsub(token, "(%p)", "%%%1")
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local pt = string.format([[^%%[string ".*"%%]:]]) -- only check that an error happened - ignore token/line since Luau error messages differ from Lua substantially
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assert(string.find(msg, pt))
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assert(string.find(msg, msg, 1, true))
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end
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-- test error message with no extra info
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assert(doit("error('hi', 0)") == 'hi')
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-- test error message with no info
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-- assert(doit("error()") == nil)
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-- test common errors/errors that crashed in the past
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assert(doit("unpack({}, 1, n=2^30)"))
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assert(doit("a=math.sin()"))
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assert(not doit("tostring(1)") and doit("tostring()"))
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assert(doit("tonumber()"))
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assert(doit("repeat until 1; a"))
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checksyntax("break label", "", "label", 1)
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assert(doit(";"))
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assert(doit("a=1;;"))
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assert(doit("return;;"))
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assert(doit("assert(false)"))
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assert(doit("assert(nil)"))
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assert(doit("a=math.sin\n(3)"))
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assert(doit("function a (... , ...) end"))
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assert(doit("function a (, ...) end"))
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checksyntax([[
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local a = {4
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]], "'}' expected (to close '{' at line 1)", "<eof>", 3)
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-- tests for better error messages
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checkmessage("a=1; bbbb=2; a=math.sin(3)+bbbb(3)", "global 'bbbb'")
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checkmessage("a=1; local a,bbbb=2,3; a = math.sin(1) and bbbb(3)",
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"local 'bbbb'")
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checkmessage("a={}; do local a=1 end a:bbbb(3)", "method 'bbbb'")
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checkmessage("local a={}; a.bbbb(3)", "field 'bbbb'")
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assert(not string.find(doit("a={13}; local bbbb=1; a[bbbb](3)"), "'bbbb'"))
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checkmessage("a={13}; local bbbb=1; a[bbbb](3)", "number")
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aaa = nil
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checkmessage("aaa.bbb:ddd(9)", "global 'aaa'")
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checkmessage("local aaa={bbb=1}; aaa.bbb:ddd(9)", "field 'bbb'")
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checkmessage("local aaa={bbb={}}; aaa.bbb:ddd(9)", "method 'ddd'")
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checkmessage("local a,b,c; (function () a = b+1 end)()", "upvalue 'b'")
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assert(not doit("local aaa={bbb={ddd=next}}; aaa.bbb:ddd(nil)"))
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checkmessage("b=1; local aaa='a'; x=aaa+b", "local 'aaa'")
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checkmessage("aaa={}; x=3/aaa", "global 'aaa'")
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checkmessage("aaa='2'; b=nil;x=aaa*b", "global 'b'")
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checkmessage("aaa={}; x=-aaa", "global 'aaa'")
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assert(not string.find(doit("aaa={}; x=(aaa or aaa)+(aaa and aaa)"), "'aaa'"))
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assert(not string.find(doit("aaa={}; (aaa or aaa)()"), "'aaa'"))
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checkmessage([[aaa=9
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repeat until 3==3
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local x=math.sin(math.cos(3))
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if math.sin(1) == x then return math.sin(1) end -- tail call
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local a,b = 1, {
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{x='a'..'b'..'c', y='b', z=x},
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{1,2,3,4,5} or 3+3<=3+3,
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3+1>3+1,
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{d = x and aaa[x or y]}}
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]], "global 'aaa'")
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checkmessage([[
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local x,y = {},1
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if math.sin(1) == 0 then return 3 end -- return
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x.a()]], "field 'a'")
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checkmessage([[
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prefix = nil
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insert = nil
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while 1 do
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local a
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if nil then break end
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insert(prefix, a)
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end]], "global 'insert'")
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checkmessage([[ -- tail call
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return math.sin("a")
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]], "'sin'")
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checkmessage([[collectgarbage("nooption")]], "invalid option")
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checkmessage([[x = print .. "a"]], "concatenate")
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checkmessage("getmetatable(io.stdin).__gc()", "no value")
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print'+'
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-- testing line error
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function lineerror (s)
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local err,msg = pcall(loadstring(s))
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local line = string.match(msg, ":(%d+):")
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return line and line+0
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end
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assert(lineerror("local a\n for i=1,'a' do \n print(i) \n end") == 2)
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-- assert(lineerror("\n local a \n for k,v in 3 \n do \n print(k) \n end") == 3)
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-- assert(lineerror("\n\n for k,v in \n 3 \n do \n print(k) \n end") == 4)
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assert(lineerror("function a.x.y ()\na=a+1\nend") == 1)
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local p = [[
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function g() f() end
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function f(x) error('a', X) end
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g()
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]]
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X=3;assert(lineerror(p) == 3)
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X=0;assert(lineerror(p) == nil)
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X=1;assert(lineerror(p) == 2)
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X=2;assert(lineerror(p) == 1)
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lineerror = nil
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if not limitedstack then
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C = 0
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-- local l = debug.getinfo(1, "l").currentline
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function y () C=C+1; y() end
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local function checkstackmessage (m)
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return (string.find(m, "^.-:%d+: stack overflow"))
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end
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assert(checkstackmessage(doit('y()')))
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assert(checkstackmessage(doit('y()')))
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assert(checkstackmessage(doit('y()')))
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-- teste de linhas em erro
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C = 0
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local l1
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local function g()
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-- l1 = debug.getinfo(1, "l").currentline
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y()
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end
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local _, stackmsg = xpcall(g, debug.traceback)
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local stack = {}
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for line in string.gmatch(stackmsg, "[^\n]*") do
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local curr = string.match(line, ":(%d+):")
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if curr then table.insert(stack, tonumber(curr)) end
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end
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end
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-- C stack overflow
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if not limitedstack then
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local count = 1
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local cso = setmetatable({}, {
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__index = function(self, i)
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count = count + 1
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return self[i]
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end,
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__newindex = function(self, i, v)
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count = count + 1
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self[i] = v
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end,
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__tostring = function(self)
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count = count + 1
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return tostring(self)
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end
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})
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local ehline
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local function ehassert(cond)
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if not cond then
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ehline = debug.info(2, "l")
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error()
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end
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end
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local userdata = newproxy(true)
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getmetatable(userdata).__index = print
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assert(debug.info(print, "s") == "[C]")
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local s, e = xpcall(tostring, function(e)
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ehassert(string.find(e, "C stack overflow"))
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print("after __tostring C stack overflow", count) -- 198: 1 resume + 1 xpcall + 198 luaB_tostring calls (which runs our __tostring successfully 197 times, erroring on the last attempt)
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ehassert(count > 1)
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local ps, pe
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-- __tostring overflow (lua_call)
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count = 1
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ps, pe = pcall(tostring, cso)
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print("after __tostring overflow in handler", count) -- 23: xpcall error handler + pcall + 23 luaB_tostring calls
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ehassert(not ps and string.find(pe, "error in error handling"))
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ehassert(count > 1)
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-- __index overflow (callTMres)
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count = 1
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ps, pe = pcall(function() return cso[cso] end)
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print("after __index overflow in handler", count) -- 23: xpcall error handler + pcall + 23 __index calls
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ehassert(not ps and string.find(pe, "error in error handling"))
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ehassert(count > 1)
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-- __newindex overflow (callTM)
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count = 1
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ps, pe = pcall(function() cso[cso] = "kohuke" end)
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print("after __newindex overflow in handler", count) -- 23: xpcall error handler + pcall + 23 __newindex calls
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ehassert(not ps and string.find(pe, "error in error handling"))
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ehassert(count > 1)
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-- test various C __index invocations on userdata
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ehassert(pcall(function() return userdata[userdata] end)) -- LOP_GETTABLE
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ehassert(pcall(function() return userdata[1] end)) -- LOP_GETTABLEN
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ehassert(pcall(function() return userdata.StringConstant end)) -- LOP_GETTABLEKS (luau_callTM)
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-- lua_resume test
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local coro = coroutine.create(function() end)
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ps, pe = coroutine.resume(coro)
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ehassert(not ps and string.find(pe, "C stack overflow"))
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return true
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end, cso)
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assert(not s)
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assert(e == true, "error in xpcall eh, line " .. tostring(ehline))
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end
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--[[
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local i=1
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while stack[i] ~= l1 do
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assert(stack[i] == l)
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i = i+1
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end
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assert(i > 15)
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]]--
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-- error in error handling
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local res, msg = xpcall(error, error)
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assert(not res and type(msg) == 'string')
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local function f (x)
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if x==0 then error('a\n')
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else
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local aux = function () return f(x-1) end
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local a,b = xpcall(aux, aux)
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return a,b
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end
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end
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if not limitedstack then
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f(3)
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end
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-- non string messages
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function f() error{msg='x'} end
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res, msg = xpcall(f, function (r) return {msg=r.msg..'y'} end)
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assert(msg.msg == 'xy')
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print('+')
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checksyntax("syntax error", "", "error", 1)
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checksyntax("1.000", "", "1.000", 1)
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checksyntax("[[a]]", "", "[[a]]", 1)
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checksyntax("'aa'", "", "'aa'", 1)
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-- test 255 as first char in a chunk
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checksyntax("\255a = 1", "", "\255", 1)
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doit('I = loadstring("a=9+"); a=3')
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assert(a==3 and I == nil)
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print('+')
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lim = 1000
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if rawget(_G, "_soft") then lim = 100 end
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for i=1,lim do
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doit('a = ')
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doit('a = 4+nil')
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end
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-- testing syntax limits
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local syntaxdepth = if limitedstack then 200 else 500
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local function testrep (init, rep)
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local s = "local a; "..init .. string.rep(rep, syntaxdepth)
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local a,b = loadstring(s)
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assert(not a) -- and string.find(b, "syntax levels"))
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end
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testrep("a=", "{")
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testrep("a=", "(")
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testrep("", "a(")
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testrep("", "do ")
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testrep("", "while a do ")
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testrep("", "if a then else ")
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testrep("", "function foo () ")
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testrep("a=", "a..")
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testrep("a=", "a^")
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-- testing other limits
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-- upvalues
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local s = "function foo ()\n local "
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for j = 1,70 do
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s = s.."a"..j..", "
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end
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s = s.."b\n"
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for j = 1,70 do
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s = s.."function foo"..j.." ()\n a"..j.."=3\n"
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end
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local a,b = loadstring(s)
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assert(not a)
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-- assert(string.find(b, "line 3"))
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-- local variables
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s = "\nfunction foo ()\n local "
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for j = 1,300 do
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s = s.."a"..j..", "
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end
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s = s.."b\n"
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local a,b = loadstring(s)
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assert(not a)
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--assert(string.find(b, "line 2"))
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-- The xpcall is intentionally going to cause an exception
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-- followed by a forced exception in the error handler.
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-- If the secondary handler isn't trapped, it will cause
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-- the unit test to fail. If the xpcall captures the
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-- second fault, it's a success.
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a, b = xpcall(
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function()
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return game[{}]
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end,
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function()
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return game.CoreGui.Name
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end)
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assert(not a)
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print(b)
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coroutine.wrap(function()
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assert(not pcall(debug.getinfo, coroutine.running(), 0, ">"))
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end)()
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-- loadstring chunk truncation
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local a,b = loadstring("nope", "@short")
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assert(not a and b:match('[^ ]+') == "short:1:")
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local a,b = loadstring("nope", "@" .. string.rep("thisisaverylongstringitssolongthatitwontfitintotheinternalbufferprovidedtovariousdebugfacilities", 10))
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assert(not a and b:match('[^ ]+') == "...wontfitintotheinternalbufferprovidedtovariousdebugfacilitiesthisisaverylongstringitssolongthatitwontfitintotheinternalbufferprovidedtovariousdebugfacilitiesthisisaverylongstringitssolongthatitwontfitintotheinternalbufferprovidedtovariousdebugfacilities:1:")
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local a,b = loadstring("nope", "=short")
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assert(not a and b:match('[^ ]+') == "short:1:")
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local a,b = loadstring("nope", "=" .. string.rep("thisisaverylongstringitssolongthatitwontfitintotheinternalbufferprovidedtovariousdebugfacilities", 10))
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assert(not a and b:match('[^ ]+') == "thisisaverylongstringitssolongthatitwontfitintotheinternalbufferprovidedtovariousdebugfacilitiesthisisaverylongstringitssolongthatitwontfitintotheinternalbufferprovidedtovariousdebugfacilitiesthisisaverylongstringitssolongthatitwontfitintotheinternalbuffe:1:")
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function ecall(fn, ...)
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local ok, err = pcall(fn, ...)
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assert(not ok)
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return err:sub((err:find(": ") or -1) + 2, #err)
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end
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-- arith errors
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assert(ecall(function() return nil + 5 end) == "attempt to perform arithmetic (add) on nil and number")
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assert(ecall(function() return "a" + "b" end) == "attempt to perform arithmetic (add) on string")
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assert(ecall(function() return 1 > nil end) == "attempt to compare nil < number") -- note reversed order (by design)
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assert(ecall(function() return "a" <= 5 end) == "attempt to compare string <= number")
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-- table errors
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assert(ecall(function() local t = {} t[nil] = 2 end) == "table index is nil")
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assert(ecall(function() local t = {} t[0/0] = 2 end) == "table index is NaN")
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assert(ecall(function() local t = {} rawset(t, nil, 2) end) == "table index is nil")
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assert(ecall(function() local t = {} rawset(t, 0/0, 2) end) == "table index is NaN")
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assert(ecall(function() local t = {} t[nil] = nil end) == "table index is nil")
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assert(ecall(function() local t = {} t[0/0] = nil end) == "table index is NaN")
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assert(ecall(function() local t = {} rawset(t, nil, nil) end) == "table index is nil")
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assert(ecall(function() local t = {} rawset(t, 0/0, nil) end) == "table index is NaN")
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-- for loop type errors
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assert(ecall(function() for i='a',2 do end end) == "invalid 'for' initial value (number expected, got string)")
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assert(ecall(function() for i=1,'a' do end end) == "invalid 'for' limit (number expected, got string)")
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assert(ecall(function() for i=1,2,'a' do end end) == "invalid 'for' step (number expected, got string)")
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-- method call errors
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assert(ecall(function() ({}):foo() end) == "attempt to call missing method 'foo' of table")
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assert(ecall(function() (""):foo() end) == "attempt to call missing method 'foo' of string")
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assert(ecall(function() (42):foo() end) == "attempt to index number with 'foo'")
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assert(ecall(function() ({foo=42}):foo() end) == "attempt to call a number value")
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assert(ecall(function() local ud = newproxy(true) getmetatable(ud).__index = {} ud:foo() end) == "attempt to call missing method 'foo' of userdata")
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assert(ecall(function() local ud = newproxy(true) getmetatable(ud).__index = function() end ud:foo() end) == "attempt to call missing method 'foo' of userdata")
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assert(ecall(function() local ud = newproxy(true) getmetatable(ud).__index = function() error("nope") end ud:foo() end) == "nope")
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return('OK')
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