local multitable = require "util.multitable";

describe("util.multitable", function()

	describe("#new()", function()

		it("should create a multitable", function()

			local mt = multitable.new();

			assert.is_table(mt, "Multitable is a table");

			assert.is_function(mt.add, "Multitable has method add");

			assert.is_function(mt.get, "Multitable has method get");

			assert.is_function(mt.remove, "Multitable has method remove");

		end);

	end);

	describe("#get()", function()

		it("should allow getting correctly", function()

			local function has_items(list, ...)

				local should_have = {};

				if select('#', ...) > 0 then

					assert.is_table(list, "has_items: list is table", 3);

				else

					assert.is.falsy(list and #list > 0, "No items, and no list");

					return true, "has-all";

				end

				for n=1,select('#', ...) do should_have[select(n, ...)] = true; end

				for _, item in ipairs(list) do

					if not should_have[item] then return false, "too-many"; end

					should_have[item] = nil;

				end

				if next(should_have) then

					return false, "not-enough";

				end

				return true, "has-all";

			end

			local function assert_has_all(message, list, ...)

				return assert.are.equal(select(2, has_items(list, ...)), "has-all", message or "List has all expected items, and no more", 2);

			end

			local mt = multitable.new();

			local trigger1, trigger2, trigger3 = {}, {}, {};

			local item1, item2, item3 = {}, {}, {};

			assert_has_all("Has no items with trigger1", mt:get(trigger1));

			mt:add(1, 2, 3, item1);

			assert_has_all("Has item1 for 1, 2, 3", mt:get(1, 2, 3), item1);

		end);

	end);

	-- Doesn't support nil

	--[[	mt:add(nil, item1);

		mt:add(nil, item2);

		mt:add(nil, item3);

		assert_has_all("Has all items with (nil)", mt:get(nil), item1, item2, item3);

	]]

end);