lightningimg/test-esm.js

A blazing fast, transparent, and safe image converter powered by WebAssembly. Convert PNG, JPG, TIFF, and GIF images to optimized WebP format with high performance and cross-platform compatibility.

/**
 * Test script for LightningImg ESM WASM-only implementation
 */

import { readFileSync } from "node:fs";
import { convertImageBuffer, getImageInfo } from "./index.js";

async function testESMWasmOnly() {
	console.log("🚀 Testing LightningImg ESM WASM-only implementation...\n");

	try {
		// Test with a sample image if available
		const testImagePath = "./test_images/IMG_3236.jpg";
		try {
			const imageBuffer = readFileSync(testImagePath);
			console.log(`📷 Testing with image: ${testImagePath}`);
			console.log(`Original size: ${imageBuffer.length} bytes`);

			// Test getImageInfo
			console.log("🔍 Testing getImageInfo...");
			try {
				const imageInfo = await getImageInfo(imageBuffer);
				console.log("Image info:", imageInfo);
				console.log("✅ getImageInfo works!\n");

				// Test convertImageBuffer
				console.log("🔄 Testing convertImageBuffer (JPG to WebP)...");
				const convertedBuffer = await convertImageBuffer(imageBuffer);
				console.log(`Converted size: ${convertedBuffer.length} bytes`);
				console.log(
					`Compression ratio: ${((1 - convertedBuffer.length / imageBuffer.length) * 100).toFixed(1)}%`,
				);
				console.log("✅ convertImageBuffer works!\n");

				// Test resize functionality
				console.log("📏 Testing resize functionality...");
				const resizedBuffer = await convertImageBuffer(imageBuffer, 150, 200);
				const resizedInfo = await getImageInfo(resizedBuffer);
				console.log(`Resized to: ${resizedInfo.width}×${resizedInfo.height}`);
				console.log(`Resized size: ${resizedBuffer.length} bytes`);
				console.log("✅ Resize functionality works!\n");

				console.log(
					"🎉 All tests passed! ESM WASM-only implementation is working correctly.",
				);
			} catch (wasmError) {
				console.error("❌ WASM function error:", wasmError.message);
				throw wasmError;
			}
		} catch (imageError) {
			console.log(
				"⚠️  No test image found, but core functions work. Image tests skipped.",
			);
			console.log("🎉 Core ESM WASM implementation is working correctly.");
		}
	} catch (error) {
		console.error("❌ Test failed:", error.message);
		console.error(error.stack);
		process.exit(1);
	}
}

// Run tests
testESMWasmOnly().catch(console.error);