Updated

tests/launcher.test.mjs

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+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import {
+	getLauncherAction,
+	inferLauncherMediaType,
+	readLauncherMediaConfig
+} from '../vr180player/launcher/launcher-config.js';
+
+function createLauncher({ attributes = {}, dataset = {} } = {}) {
+	return {
+		dataset,
+		getAttribute(name) {
+			return attributes[name] ?? '';
+		}
+	};
+}
+
+test('getLauncherAction opens immersive only when immersive VR is supported', () => {
+	assert.equal(getLauncherAction(true), 'immersive');
+	assert.equal(getLauncherAction(false), 'fallback-modal');
+});
+
+test('inferLauncherMediaType detects common image and video extensions', () => {
+	assert.equal(inferLauncherMediaType('https://cdn.example.com/demo.png'), 'image');
+	assert.equal(inferLauncherMediaType('/media/demo.JPG?cache=1'), 'image');
+	assert.equal(inferLauncherMediaType('/media/demo.webm'), 'video');
+	assert.equal(inferLauncherMediaType('/media/demo.mp4#clip'), 'video');
+	assert.equal(inferLauncherMediaType('/media/demo'), null);
+});
+
+test('readLauncherMediaConfig reads explicit launcher data', () => {
+	const config = readLauncherMediaConfig(createLauncher({
+		dataset: {
+			crossorigin: 'anonymous',
+			headLock: 'position',
+			mediaType: 'video',
+			poster: '/poster.jpg',
+			preload: 'auto',
+			projection: 'plane',
+			src: '/media/demo',
+			title: 'Demo Video',
+			type: 'video/mp4'
+		}
+	}));
+
+	assert.deepEqual(config, {
+		carousel: false,
+		crossOrigin: 'anonymous',
+		headLockMode: 'position',
+		mediaType: 'video',
+		poster: '/poster.jpg',
+		preload: 'auto',
+		projectionMode: 'plane',
+		src: '/media/demo',
+		srcs: ['/media/demo'],
+		title: 'Demo Video',
+		type: 'video/mp4'
+	});
+});
+
+test('readLauncherMediaConfig infers defaults from data-src and aria-label', () => {
+	const config = readLauncherMediaConfig(createLauncher({
+		attributes: {
+			'aria-label': 'Demo Image'
+		},
+		dataset: {
+			src: '/media/demo-image.webp'
+		}
+	}));
+
+	assert.equal(config.mediaType, 'image');
+	assert.equal(config.projectionMode, 'vr180');
+	assert.equal(config.headLockMode, 'auto');
+	assert.equal(config.preload, 'metadata');
+	assert.equal(config.carousel, false);
+	assert.deepEqual(config.srcs, ['/media/demo-image.webp']);
+	assert.equal(config.title, 'Demo Image');
+});
+
+test('readLauncherMediaConfig supports image carousel launchers', () => {
+	const config = readLauncherMediaConfig(createLauncher({
+		dataset: {
+			carousel: '',
+			mediaType: 'image',
+			projection: 'plane',
+			src: '/media/first.png, /media/second.png',
+			title: 'Demo Carousel'
+		}
+	}));
+
+	assert.equal(config.carousel, true);
+	assert.equal(config.mediaType, 'image');
+	assert.equal(config.projectionMode, 'plane');
+	assert.equal(config.src, '/media/first.png');
+	assert.deepEqual(config.srcs, ['/media/first.png', '/media/second.png']);
+});
+
+test('readLauncherMediaConfig rejects missing source or unsupported values', () => {
+	assert.equal(readLauncherMediaConfig(createLauncher()), null);
+	assert.equal(readLauncherMediaConfig(createLauncher({ dataset: { projection: 'cube', src: '/media/demo.png' } })), null);
+	assert.equal(readLauncherMediaConfig(createLauncher({ dataset: { headLock: 'bad', src: '/media/demo.png' } })), null);
+	assert.equal(readLauncherMediaConfig(createLauncher({ dataset: { mediaType: 'audio', src: '/media/demo.png' } })), null);
+	assert.equal(readLauncherMediaConfig(createLauncher({ dataset: { src: '/media/demo' } })), null);
+	assert.equal(readLauncherMediaConfig(createLauncher({ dataset: { carousel: '', mediaType: 'video', src: '/media/demo.mp4, /media/other.mp4' } })), null);
+	assert.equal(readLauncherMediaConfig(createLauncher({ dataset: { carousel: '', src: '/media/demo.png' } })), null);
+	assert.equal(readLauncherMediaConfig(createLauncher({ dataset: { src: '/media/first.png, /media/second.png' } })), null);
+});