local json = require "util.json";

local array = require "util.array";

describe("util.json", function()

	describe("#encode()", function()

		it("should work", function()

			local function test(f, j, e)

				if e then

					assert.are.equal(f(j), e);

				end

				assert.are.equal(f(j), f(json.decode(f(j))));

			end

			test(json.encode, json.null, "null")

			test(json.encode, {}, "{}")

			test(json.encode, {a=1});

			test(json.encode, {a={1,2,3}});

			test(json.encode, {1}, "[1]");

		end);

	end);

	describe("#decode()", function()

		it("should work", function()

			local empty_array = json.decode("[]");

			assert.are.equal(type(empty_array), "table");

			assert.are.equal(#empty_array, 0);

			assert.are.equal(next(empty_array), nil);

		end);

	end);

	describe("testcases", function()

		local valid_data = {};

		local invalid_data = {};

		local skip = "fail1.json fail9.json fail18.json fail15.json fail13.json fail25.json fail26.json fail27.json fail28.json fail17.json pass1.json";

		setup(function()

			local lfs = require "lfs";

			local path = "spec/json";

			for name in lfs.dir(path) do

				if name:match("%.json$") then

					local f = assert(io.open(path.."/"..name));

					local content = assert(f:read("*a"));

					assert(f:close());

					if skip:find(name) then --luacheck: ignore 542

						-- Skip

					elseif name:match("^pass") then

						valid_data[name] = content;

					elseif name:match("^fail") then

						invalid_data[name] = content;

					end

				end

			end

		end)

		it("should pass valid testcases", function()

			for name, content in pairs(valid_data) do

				local parsed, err = json.decode(content);

				assert(parsed, name..": "..tostring(err));

			end

		end);

		it("should fail invalid testcases", function()

			for name, content in pairs(invalid_data) do

				local parsed, err = json.decode(content);

				assert(not parsed, name..": "..tostring(err));

			end

		end);

	end)

	describe("util.array integration", function ()

		it("works", function ()

			assert.equal("[]", json.encode(array()));

			assert.equal("[1,2,3]", json.encode(array({1,2,3})));

			assert.equal(getmetatable(array()), getmetatable(json.decode("[]")));

		end);

	end);

end);