Add tests for Address.addressedTo

Make sure the confusing logic in addressedTo is working correctly by
adding tests for it.

test/lib/data/messages_core.js

@@ -0,0 +1,83 @@
+"use strict";
+const assert = require("assert").strict;
+const lib = require("@clusterio/lib");
+const { Address } = lib;
+
+describe("lib/data/messages_core", function() {
+	describe("class Address", function() {
+		const controller = new Address(Address.controller, 0);
+		const host1 = new Address(Address.host, 1);
+		const host2 = new Address(Address.host, 2);
+		const instance1 = new Address(Address.instance, 1);
+		const instance2 = new Address(Address.instance, 2);
+		const control1 = new Address(Address.control, 1);
+		const control2 = new Address(Address.control, 2);
+		const hostBr = new Address(Address.broadcast, Address.host);
+		const instanceBr = new Address(Address.broadcast, Address.instance);
+		const controlBr = new Address(Address.broadcast, Address.control);
+
+		it("Should correctly resolve addressedTo", function() {
+			assert(controller.addressedTo(controller));
+			assert(!controller.addressedTo(host1));
+			assert(!controller.addressedTo(instance1));
+			assert(!controller.addressedTo(control1));
+			assert(!controller.addressedTo(hostBr));
+			assert(!controller.addressedTo(instanceBr));
+			assert(!controller.addressedTo(controlBr));
+
+			assert(!host1.addressedTo(controller));
+			assert(host1.addressedTo(host1));
+			assert(!host1.addressedTo(host2));
+			assert(!host1.addressedTo(instance1));
+			assert(!host1.addressedTo(control1));
+			assert(!host1.addressedTo(hostBr));
+			assert(!host1.addressedTo(instanceBr));
+			assert(!host1.addressedTo(controlBr));
+
+			assert(!instance1.addressedTo(controller));
+			assert(!instance1.addressedTo(host1));
+			assert(instance1.addressedTo(instance1));
+			assert(!instance1.addressedTo(instance2));
+			assert(!instance1.addressedTo(control1));
+			assert(!instance1.addressedTo(hostBr));
+			assert(!instance1.addressedTo(instanceBr));
+			assert(!instance1.addressedTo(controlBr));
+
+			assert(!control1.addressedTo(controller));
+			assert(!control1.addressedTo(host1));
+			assert(!control1.addressedTo(instance1));
+			assert(control1.addressedTo(control1));
+			assert(!control1.addressedTo(control2));
+			assert(!control1.addressedTo(hostBr));
+			assert(!control1.addressedTo(instanceBr));
+			assert(!control1.addressedTo(controlBr));
+
+			assert(!hostBr.addressedTo(controller));
+			assert(hostBr.addressedTo(host1));
+			assert(hostBr.addressedTo(host2));
+			assert(!hostBr.addressedTo(instance1));
+			assert(!hostBr.addressedTo(control1));
+			assert(!hostBr.addressedTo(hostBr));
+			assert(!hostBr.addressedTo(instanceBr));
+			assert(!hostBr.addressedTo(controlBr));
+
+			assert(!instanceBr.addressedTo(controller));
+			assert(!instanceBr.addressedTo(host1));
+			assert(instanceBr.addressedTo(instance1));
+			assert(instanceBr.addressedTo(instance2));
+			assert(!instanceBr.addressedTo(control1));
+			assert(!instanceBr.addressedTo(hostBr));
+			assert(!instanceBr.addressedTo(instanceBr));
+			assert(!instanceBr.addressedTo(controlBr));
+
+			assert(!controlBr.addressedTo(controller));
+			assert(!controlBr.addressedTo(host1));
+			assert(!controlBr.addressedTo(instance1));
+			assert(controlBr.addressedTo(control1));
+			assert(controlBr.addressedTo(control2));
+			assert(!controlBr.addressedTo(hostBr));
+			assert(!controlBr.addressedTo(instanceBr));
+			assert(!controlBr.addressedTo(controlBr));
+		});
+	});
+});