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local dbg = require "util.debug";
describe("util.debug", function ()
describe("traceback()", function ()
it("works", function ()
local tb = dbg.traceback();
assert.is_string(tb);
end);
end);
describe("get_traceback_table()", function ()
it("works", function ()
local count = 0;
-- MUST stay in sync with the line numbers of these functions:
local f1_defined, f3_defined = 43, 15;
local function f3(f3_param) --luacheck: ignore 212/f3_param
count = count + 1;
for i = 1, 2 do
local tb = dbg.get_traceback_table(i == 1 and coroutine.running() or nil, 0);
assert.is_table(tb);
--print(dbg.traceback(), "\n\n\n", require "util.serialization".serialize(tb, { fatal = false, unquoted = true}));
local found_f1, found_f3;
for _, frame in ipairs(tb) do
if frame.info.linedefined == f1_defined then
assert.equal(0, #frame.locals);
assert.equal("f2", frame.upvalues[1].name);
assert.equal("f1_upvalue", frame.upvalues[2].name);
found_f1 = true;
elseif frame.info.linedefined == f3_defined then
assert.equal("f3_param", frame.locals[1].name);
found_f3 = true;
end
end
assert.is_true(found_f1);
assert.is_true(found_f3);
end
end
local function f2()
local f2_local = "hello";
return f3(f2_local);
end
local f1_upvalue = "upvalue1";
local function f1()
f2(f1_upvalue);
end
-- ok/err are caught and re-thrown so that
-- busted gets to handle them in its own way
local ok, err;
local function hook()
debug.sethook();
ok, err = pcall(f1);
end
-- Test the traceback is correct in various
-- types of caller environments
-- From a Lua hook
debug.sethook(hook, "crl", 1);
local a = string.sub("abcdef", 3, 4);
assert.equal("cd", a);
debug.sethook();
assert.equal(1, count);
if not ok then
error(err);
end
ok, err = nil, nil;
-- From a signal handler (C hook)
require "util.signal".signal("SIGUSR1", hook);
require "util.signal".raise("SIGUSR1");
assert.equal(2, count);
if not ok then
error(err);
end
ok, err = nil, nil;
-- Inside a coroutine
local co = coroutine.create(function ()
hook();
end);
coroutine.resume(co);
if not ok then
error(err);
end
assert.equal(3, count);
end);
end);
end);
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