local errors = require "util.error"

describe("util.error", function ()

	describe("new()", function ()

		it("works", function ()

			local err = errors.new("bork", "bork bork");

			assert.not_nil(err);

			assert.equal("cancel", err.type);

			assert.equal("undefined-condition", err.condition);

			assert.same("bork bork", err.context);

		end);

		describe("templates", function ()

			it("works", function ()

				local templates = {

					["fail"] = {

						type = "wait",

						condition = "internal-server-error",

						code = 555;

					};

				};

				local err = errors.new("fail", { traceback = "in some file, somewhere" }, templates);

				assert.equal("wait", err.type);

				assert.equal("internal-server-error", err.condition);

				assert.equal(555, err.code);

				assert.same({ traceback = "in some file, somewhere" }, err.context);

			end);

		end);

	end);

	describe("is_err()", function ()

		it("works", function ()

			assert.truthy(errors.is_err(errors.new()));

			assert.falsy(errors.is_err("not an error"));

		end);

	end);

	describe("coerce", function ()

		it("works", function ()

			local ok, err = errors.coerce(nil, "it dun goofed");

			assert.is_nil(ok);

			assert.truthy(errors.is_err(err))

		end);

	end);

	describe("from_stanza", function ()

		it("works", function ()

			local st = require "util.stanza";

			local m = st.message({ type = "chat" });

			local e = st.error_reply(m, "modify", "bad-request", nil, "error.example"):tag("extra", { xmlns = "xmpp:example.test" });

			local err = errors.from_stanza(e);

			assert.truthy(errors.is_err(err));

			assert.equal("modify", err.type);

			assert.equal("bad-request", err.condition);

			assert.equal(e, err.context.stanza);

			assert.equal("error.example", err.context.by);

			assert.not_nil(err.extra.tag);

			assert.not_has_error(function ()

				errors.from_stanza(st.message())

			end);

		end);

	end);

	describe("__tostring", function ()

		it("doesn't throw", function ()

			assert.has_no.errors(function ()

				-- See 6f317e51544d

				tostring(errors.new());

			end);

		end);

	end);

	describe("extra", function ()

		it("keeps some extra fields", function ()

			local err = errors.new({condition="gone",text="Sorry mate, it's all gone",extra={uri="file:///dev/null"}});

			assert.is_table(err.extra);

			assert.equal("file:///dev/null", err.extra.uri);

		end);

	end)

	describe("init", function()

		it("basics works", function()

			local reg = errors.init("test", {

				broke = {type = "cancel"; condition = "internal-server-error"; text = "It broke :("};

				nope = {type = "auth"; condition = "not-authorized"; text = "Can't let you do that Dave"};

			});

			local broke = reg.new("broke");

			assert.equal("cancel", broke.type);

			assert.equal("internal-server-error", broke.condition);

			assert.equal("It broke :(", broke.text);

			assert.equal("test", broke.source);

			local nope = reg.new("nope");

			assert.equal("auth", nope.type);

			assert.equal("not-authorized", nope.condition);

			assert.equal("Can't let you do that Dave", nope.text);

		end);

		it("compact mode works", function()

			local reg = errors.init("test", "spec", {

				broke = {"cancel"; "internal-server-error"; "It broke :("};

				nope = {"auth"; "not-authorized"; "Can't let you do that Dave"; "sorry-dave"};

			});

			local broke = reg.new("broke");

			assert.equal("cancel", broke.type);

			assert.equal("internal-server-error", broke.condition);

			assert.equal("It broke :(", broke.text);

			assert.is_nil(broke.extra);

			local nope = reg.new("nope");

			assert.equal("auth", nope.type);

			assert.equal("not-authorized", nope.condition);

			assert.equal("Can't let you do that Dave", nope.text);

			assert.equal("spec", nope.extra.namespace);

			assert.equal("sorry-dave", nope.extra.condition);

		end);

		it("registry looks the same regardless of syntax", function()

			local normal = errors.init("test", {

				broke = {type = "cancel"; condition = "internal-server-error"; text = "It broke :("};

				nope = {

					type = "auth";

					condition = "not-authorized";

					text = "Can't let you do that Dave";

					extra = {namespace = "spec"; condition = "sorry-dave"};

				};

			});

			local compact1 = errors.init("test", "spec", {

				broke = {"cancel"; "internal-server-error"; "It broke :("};

				nope = {"auth"; "not-authorized"; "Can't let you do that Dave"; "sorry-dave"};

			});

			local compact2 = errors.init("test", {

				broke = {"cancel"; "internal-server-error"; "It broke :("};

				nope = {"auth"; "not-authorized"; "Can't let you do that Dave"};

			});

			assert.same(normal.registry, compact1.registry);

			assert.same({

				broke = {type = "cancel"; condition = "internal-server-error"; text = "It broke :("};

				nope = {type = "auth"; condition = "not-authorized"; text = "Can't let you do that Dave"};

			}, compact2.registry);

		end);

		describe(".wrap", function ()

			local reg = errors.init("test", "spec", {

				myerror = { "cancel", "internal-server-error", "Oh no" };

			});

			it("is exposed", function ()

				assert.is_function(reg.wrap);

			end);

			it("returns errors according to the registry", function ()

				local e = reg.wrap("myerror");

				assert.equal("cancel", e.type);

				assert.equal("internal-server-error", e.condition);

				assert.equal("Oh no", e.text);

			end);

			it("passes through existing errors", function ()

				local e = reg.wrap(reg.new({ type = "auth", condition = "forbidden" }));

				assert.equal("auth", e.type);

				assert.equal("forbidden", e.condition);

			end);

			it("wraps arbitrary values", function ()

				local e = reg.wrap(123);

				assert.equal("cancel", e.type);

				assert.equal("undefined-condition", e.condition);

				assert.equal(123, e.context.wrapped_error);

			end);

		end);

		describe(".coerce", function ()

			local reg = errors.init("test", "spec", {

				myerror = { "cancel", "internal-server-error", "Oh no" };

			});

			it("is exposed", function ()

				assert.is_function(reg.coerce);

			end);

			it("passes through existing errors", function ()

				local function test()

					return nil, errors.new({ type = "auth", condition = "forbidden" });

				end

				local ok, err = reg.coerce(test());

				assert.is_nil(ok);

				assert.is_truthy(errors.is_err(err));

				assert.equal("forbidden", err.condition);

			end);

			it("passes through successful return values", function ()

				local function test()

					return 1, 2, 3, 4;

				end

				local one, two, three, four = reg.coerce(test());

				assert.equal(1, one);

				assert.equal(2, two);

				assert.equal(3, three);

				assert.equal(4, four);

			end);

			it("wraps non-error objects", function ()

				local function test()

					return nil, "myerror";

				end

				local ok, err = reg.coerce(test());

				assert.is_nil(ok);

				assert.is_truthy(errors.is_err(err));

				assert.equal("internal-server-error", err.condition);

				assert.equal("Oh no", err.text);

			end);

		end);

	end);

end);