Alex2Node/test/discovery.test.js

"use strict";
// Discovery: a message on <root>/discover is answered on <root>/discover_r with one JSON array, an endpoint object
// per registered device.
const { test } = require("node:test");
const assert = require("node:assert/strict");
const { Alex2MQTT, AlexaInterfaceType, DisplayCategory } = require("alex2node");
const { setup, connected, until } = require("./helpers/harness.js");

// Ask as Alex2MQTT does and return the endpoints of the one answer.
async function discover(alexa, root) {
  alexa.publish(`${root}/discover`, { namespace: "Alexa.Discovery", name: "Discover" });
  await until(() => alexa.on(`${root}/discover_r`).length === 1, 3000, "discovery reply");
  return alexa.on(`${root}/discover_r`)[0];
}

test("discovery answers with every registered device and its capabilities", async () => {
  const { alexa, bridge } = await setup(Alex2MQTT, "root");
  const discovered = [];
  bridge.on("discover", (n) => discovered.push(n));
  const lamp = bridge.registerDevice("Dining Room Light", "5020AA", DisplayCategory.LIGHT);
  lamp.addCapability(AlexaInterfaceType.POWER_CONTROLLER, { proactivelyReported: true });
  lamp.addCapability(AlexaInterfaceType.BRIGHTNESS_CONTROLLER);
  const scene = bridge.registerDevice("Evening", "scene-1", DisplayCategory.SCENE_TRIGGER);
  scene.addCapability(AlexaInterfaceType.SCENE_CONTROLLER);

  const endpoints = await discover(alexa, "root");
  assert.equal(endpoints.length, 2);
  assert.equal(endpoints[0].friendlyName, "Dining Room Light");
  assert.deepEqual(endpoints[0].displayCategories, ["LIGHT"]);

  const power = endpoints[0].capabilities.find((c) => c.interface === "Alexa.PowerController");
  assert.equal(power.properties.proactivelyReported, true);
  assert.deepEqual(power.properties.supported, [{ name: "powerState" }]);

  // Alexa.SceneController has no properties block
  const activation = endpoints[1].capabilities.find((c) => c.interface === "Alexa.SceneController");
  assert.equal(activation.supportsDeactivation, true);
  assert.equal(activation.version, "3");
  assert.equal(activation.properties, undefined);

  await until(() => discovered.length === 1, 3000, "the discover event");
  assert.deepEqual(discovered, [2]);
  assert.notEqual(bridge.lastDiscoveryAt, null);
});

test("unregisterDevice: the device is gone from the next discovery answer", async () => {
  const { alexa, bridge } = await setup(Alex2MQTT, "root");
  const lamp = bridge.registerDevice("Dining Room Light", "5020AA", DisplayCategory.LIGHT);
  lamp.addCapability(AlexaInterfaceType.POWER_CONTROLLER);
  const scene = bridge.registerDevice("Evening", "scene-1", DisplayCategory.SCENE_TRIGGER);
  scene.addCapability(AlexaInterfaceType.SCENE_CONTROLLER);

  assert.equal(bridge.unregisterDevice("scene-1"), true);
  assert.equal(bridge.unregisterDevice("scene-1"), false);
  assert.equal(bridge.getDevices().length, 1);

  const endpoints = await discover(alexa, "root");
  assert.deepEqual(endpoints.map((e) => e.endpointId), ["5020AA"]);
});

test("registerDevice with an endpointId already registered returns the existing device and warns", async () => {
  const logs = [];
  const { url, alexa, bridge } = await setup(Alex2MQTT, "root", { log: (m) => logs.push(m) });
  const first = bridge.registerDevice("Lamp A", "same", DisplayCategory.LIGHT);
  first.addCapability(AlexaInterfaceType.POWER_CONTROLLER);
  const again = bridge.registerDevice("Lamp B", "same", DisplayCategory.SWITCH);
  assert.equal(again, first);
  assert.equal(again.name, "Lamp A");
  assert.equal(bridge.getDevices().length, 1);
  assert.ok(logs.some((m) => /warning: registerDevice\("same"\)/.test(m)), "warned through the log hook");

  const endpoints = await discover(alexa, "root");
  assert.deepEqual(endpoints.map((e) => e.endpointId), ["same"]);

  // Without a log hook (the examples and the Quick Start set none) the warning falls back to console.warn.
  const quiet = await connected(new Alex2MQTT("u", "p", "root-quiet", false, { host: url }));
  const warned = [];
  const realWarn = console.warn;
  console.warn = (...args) => warned.push(args.join(" "));
  try {
    quiet.registerDevice("Q", "same", null);
    assert.equal(quiet.registerDevice("Q again", "same", null).name, "Q");
  } finally {
    console.warn = realWarn;
  }
  assert.ok(warned.some((m) => /warning: registerDevice\("same"\)/.test(m)), "console.warn without a log hook");
});

test("ThermostatController discovery: version 3.2, targetSetpoint listed with both setpoints and the mode", async () => {
  const { alexa, bridge } = await setup(Alex2MQTT, "root");
  const lamp = bridge.registerDevice("Lamp", "lamp-1", DisplayCategory.LIGHT);
  lamp.addCapability(AlexaInterfaceType.POWER_CONTROLLER);
  const thermostat = bridge.registerDevice("Thermostat", "thermo-1", DisplayCategory.THERMOSTAT);
  thermostat.addCapability(AlexaInterfaceType.THERMOSTAT_CONTROLLER);

  const endpoints = await discover(alexa, "root");
  assert.deepEqual(endpoints.map((e) => e.endpointId), ["lamp-1", "thermo-1"]);
  const capability = endpoints[1].capabilities.find((c) => c.interface === "Alexa.ThermostatController");
  assert.equal(capability.version, "3.2");
  assert.deepEqual(
    capability.properties.supported.map((p) => p.name),
    ["targetSetpoint", "lowerSetpoint", "upperSetpoint", "thermostatMode"]
  );
});