1 files changed, 79 insertions, 0 deletions
diff --git a/spec/util_serialization_spec.lua b/spec/util_serialization_spec.lua
new file mode 100644
index 00000000..2af5d803
--- /dev/null
+++ b/spec/util_serialization_spec.lua
@@ -0,0 +1,79 @@
+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);
+