File

spec/util_serialization_spec.lua @ 11769:071715a18394

mod_pubsub: Move reversal of item order in <items> Examples in XEP-0060 suggest that items should be listed in chronological order, but we get them from the archive in reverse order. However when requesting specific items by id the results keep that order and we don't want to flip it again. At some point it would likely be best to use the archive API directly instead of this util.cache-compatible wrapper.
author Kim Alvefur <zash@zash.se>
date Sun, 05 Sep 2021 18:42:44 +0200
parent 9567:dbfa286cfa88
line wrap: on
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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);