File

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