File

spec/util_array_spec.lua @ 13028:b2e6a175537d

mod_debug_reset: Don't delay operations until next tick For some unknown reason, this was required with the old mock util.time functions prior to 012d6e7b723a. After 012d6e7b723a, it breaks. So I'm happy to revert to not delaying anything. This makes tests pass again.
author Matthew Wild <mwild1@gmail.com>
date Thu, 06 Apr 2023 14:17:50 +0100
parent 11787:3ae6fa901a8b
child 13245:ffe4adbd2af9
line wrap: on
line source

local array = require "util.array";
describe("util.array", function ()
	describe("creation", function ()
		describe("from table", function ()
			it("works", function ()
				local a = array({"a", "b", "c"});
				assert.same({"a", "b", "c"}, a);
			end);
		end);

		describe("from iterator", function ()
			it("works", function ()
				-- collects the first value, ie the keys
				local a = array(ipairs({true, true, true}));
				assert.same({1, 2, 3}, a);
			end);
		end);

		describe("collect", function ()
			it("works", function ()
				-- collects the first value, ie the keys
				local a = array.collect(ipairs({true, true, true}));
				assert.same({1, 2, 3}, a);
			end);
		end);

	end);

	describe("metatable", function ()
		describe("operator", function ()
			describe("addition", function ()
				it("works", function ()
					local a = array({ "a", "b" });
					local b = array({ "c", "d" });
					assert.same({"a", "b", "c", "d"}, a + b);
				end);
			end);

			describe("equality", function ()
				it("works", function ()
					local a1 = array({ "a", "b" });
					local a2 = array({ "a", "b" });
					local b = array({ "c", "d" });
					assert.truthy(a1 == a2);
					assert.falsy(a1 == b);
					assert.falsy(a1 == { "a", "b" }, "Behavior of metatables changed in Lua 5.3");
				end);
			end);

			describe("division", function ()
				it("works", function ()
					local a = array({ "a", "b", "c" });
					local b = a / function (i) if i ~= "b" then return i .. "x" end end;
					assert.same({ "ax", "cx" }, b);
				end);
			end);

		end);
	end);

	describe("methods", function ()
		describe("map", function ()
			it("works", function ()
				local a = array({ "a", "b", "c" });
				local b = a:map(string.upper);
				assert.same({ "A", "B", "C" }, b);
			end);
		end);

		describe("filter", function ()
			it("works", function ()
				local a = array({ "a", "b", "c" });
				a:filter(function (i) return i ~= "b" end);
				assert.same({ "a", "c" }, a);
			end);
		end);

		describe("sort", function ()
			it("works", function ()
				local a = array({ 5, 4, 3, 1, 2, });
				a:sort();
				assert.same({ 1, 2, 3, 4, 5, }, a);
			end);
		end);

		describe("unique", function ()
			it("works", function ()
				local a = array({ "a", "b", "c", "c", "a", "b" });
				a:unique();
				assert.same({ "a", "b", "c" }, a);
			end);
		end);

		describe("pluck", function ()
			it("works", function ()
				local a = array({ { a = 1, b = -1 }, { a = 2, b = -2 }, });
				a:pluck("a");
				assert.same({ 1, 2 }, a);
			end);
		end);


		describe("reverse", function ()
			it("works", function ()
				local a = array({ "a", "b", "c" });
				a:reverse();
				assert.same({ "c", "b", "a" }, a);
			end);
		end);

		-- TODO :shuffle

		describe("append", function ()
			it("works", function ()
				local a = array({ "a", "b", "c" });
				a:append(array({ "d", "e", }));
				assert.same({ "a", "b", "c", "d", "e" }, a);
			end);
		end);

		describe("push", function ()
			it("works", function ()
				local a = array({ "a", "b", "c" });
				a:push("d"):push("e");
				assert.same({ "a", "b", "c", "d", "e" }, a);
			end);
		end);

		describe("pop", function ()
			it("works", function ()
				local a = array({ "a", "b", "c" });
				assert.equal("c", a:pop());
				assert.same({ "a", "b", }, a);
			end);
		end);

		describe("concat", function ()
			it("works", function ()
				local a = array({ "a", "b", "c" });
				assert.equal("a,b,c", a:concat(","));
			end);
		end);

		describe("length", function ()
			it("works", function ()
				local a = array({ "a", "b", "c" });
				assert.equal(3, a:length());
			end);
		end);

		describe("slice", function ()
			it("works", function ()
				local a = array({ "a", "b", "c" });
				assert.equal(array.slice(a, 1, 2), array{ "a", "b" });
				assert.equal(array.slice(a, 1, 3), array{ "a", "b", "c" });
				assert.equal(array.slice(a, 2, 3), array{ "b", "c" });
				assert.equal(array.slice(a, 2), array{ "b", "c" });
				assert.equal(array.slice(a, -4), array{ "a", "b", "c" });
				assert.equal(array.slice(a, -3), array{ "a", "b", "c" });
				assert.equal(array.slice(a, -2), array{ "b", "c" });
				assert.equal(array.slice(a, -1), array{ "c" });
			end);

			it("can mutate", function ()
				local a = array({ "a", "b", "c" });
				assert.equal(a:slice(-1), array{"c"});
				assert.equal(a, array{"c"});
			end);
		end);
	end);

	-- TODO The various array.foo(array ina, array outa) functions
end);