File

spec/util_serialization_spec.lua @ 12983:4533c9b906b0

util.format: Tweak serialization of %q formatted entries Improves serialization of function references especially, the built-in default handling of that in util.serialization is not the most informative. Now, along with the function metatable from util.startup, the actual function can be found by filename and line number.
author Kim Alvefur <zash@zash.se>
date Sun, 26 Mar 2023 00:18:05 +0100
parent 9567:dbfa286cfa88
line wrap: on
line source

local serialization = require "util.serialization";

describe("util.serialization", function ()
	describe("serialize", function ()
		it("makes a string", function ()
			assert.is_string(serialization.serialize({}));
			assert.is_string(serialization.serialize(nil));
			assert.is_string(serialization.serialize(1));
			assert.is_string(serialization.serialize(true));
		end);

		it("rejects function by default", function ()
			assert.has_error(function ()
				serialization.serialize(function () end)
			end);
		end);

		it("makes a string in debug mode", function ()
			assert.is_string(serialization.serialize(function () end, "debug"));
		end);

		it("rejects cycles", function ()
			assert.has_error(function ()
				local t = {}
				t[t] = { t };
				serialization.serialize(t)
			end);
			-- also with multirefs allowed
			assert.has_error(function ()
				local t = {}
				t[t] = { t };
				serialization.serialize(t, { multirefs = true })
			end);
		end);

		it("rejects multiple references to same table", function ()
			assert.has_error(function ()
				local t1 = {};
				local t2 = { t1, t1 };
				serialization.serialize(t2, { multirefs = false });
			end);
		end);

		it("optionally allows multiple references to same table", function ()
			assert.has_error(function ()
				local t1 = {};
				local t2 = { t1, t1 };
				serialization.serialize(t2, { multirefs = true });
			end);
		end);

		it("roundtrips", function ()
			local function test(data)
				local serialized = serialization.serialize(data);
				assert.is_string(serialized);
				local deserialized, err = serialization.deserialize(serialized);
				assert.same(data, deserialized, err);
			end

			test({});
			test({hello="world"});
			test("foobar")
			test("\0\1\2\3");
			test("nödåtgärd");
			test({1,2,3,4});
			test({foo={[100]={{"bar"},{baz=1}}}});
			test({["goto"] = {["function"]={["do"]="keywords"}}});
		end);

		it("can serialize with metatables", function ()
			local s = serialization.new({ freeze = true });
			local t = setmetatable({ a = "hi" }, { __freeze = function (t) return { t.a } end });
			local rt = serialization.deserialize(s(t));
			assert.same({"hi"}, rt);
		end);

	end);
end);