Add native Cast integration

test/cast/test.cast.mapper.node.ts

@@ -0,0 +1,39 @@
+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import { CastMapper } from '../../ts/integrations/cast/index.js';
+
+const snapshot = {
+  deviceInfo: {
+    uuid: '1234567890abcdef1234567890abcdef',
+    friendlyName: 'Living Room TV',
+    modelName: 'Chromecast',
+    manufacturer: 'Google',
+  },
+  receiverStatus: {
+    applications: [{ appId: 'CC1AD845', displayName: 'Default Media Receiver', transportId: 'transport-1' }],
+    volume: { level: 0.44, muted: false },
+    isActiveInput: true,
+  },
+  mediaStatus: {
+    mediaSessionId: 1,
+    playerState: 'PLAYING',
+    currentTime: 12,
+    media: {
+      contentId: 'https://example.com/movie.mp4',
+      contentType: 'video/mp4',
+      duration: 120,
+      metadata: { title: 'Sample Movie' },
+    },
+  },
+};
+
+tap.test('maps Google Cast snapshots to media devices and entities', async () => {
+  const devices = CastMapper.toDevices(snapshot);
+  const entities = CastMapper.toEntities(snapshot);
+  expect(devices[0].id).toEqual('cast.device.1234567890abcdef1234567890abcdef');
+  expect(devices[0].state.some((stateArg) => stateArg.featureId === 'volume' && stateArg.value === 44)).toBeTrue();
+  expect(entities[0].platform).toEqual('media_player');
+  expect(entities[0].state).toEqual('playing');
+  expect(entities[0].attributes?.mediaTitle).toEqual('Sample Movie');
+});
+
+export default tap.start();