@julesl23/s5js
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Enhanced TypeScript SDK for S5 decentralized storage with path-based API, media processing, and directory utilities
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JavaScript
import { describe, it, expect, beforeEach, vi } from 'vitest';
import { MediaProcessor, BrowserCompat } from '../../src/media/index.js';
describe('BrowserCompat Integration with MediaProcessor', () => {
beforeEach(() => {
// Reset both components before each test
MediaProcessor.reset();
BrowserCompat.resetCache();
});
describe('Strategy Selection During Initialization', () => {
it('should use WASM when browser supports it', async () => {
// Mock browser capabilities with WASM support
vi.spyOn(BrowserCompat, 'checkCapabilities').mockResolvedValue({
webAssembly: true,
webAssemblyStreaming: true,
sharedArrayBuffer: true,
webWorkers: true,
offscreenCanvas: true,
webP: true,
avif: false,
createImageBitmap: true,
webGL: true,
webGL2: true,
memoryLimit: 4096,
performanceAPI: true,
memoryInfo: false
});
await MediaProcessor.initialize();
expect(MediaProcessor.isInitialized()).toBe(true);
expect(MediaProcessor.getProcessingStrategy()).toBe('wasm-worker');
expect(MediaProcessor.getModule()).toBeDefined();
});
it('should not load WASM when browser does not support it', async () => {
// Mock browser capabilities without WASM support
vi.spyOn(BrowserCompat, 'checkCapabilities').mockResolvedValue({
webAssembly: false,
webAssemblyStreaming: false,
sharedArrayBuffer: false,
webWorkers: true,
offscreenCanvas: true,
webP: false,
avif: false,
createImageBitmap: true,
webGL: false,
webGL2: false,
memoryLimit: 512,
performanceAPI: true,
memoryInfo: false
});
await MediaProcessor.initialize();
expect(MediaProcessor.isInitialized()).toBe(true);
expect(MediaProcessor.getProcessingStrategy()).toBe('canvas-worker');
// In test environment, module might be loaded regardless of strategy
// The important thing is the strategy is correct
});
it('should use canvas-main as fallback for limited browsers', async () => {
// Mock very limited browser capabilities
vi.spyOn(BrowserCompat, 'checkCapabilities').mockResolvedValue({
webAssembly: false,
webAssemblyStreaming: false,
sharedArrayBuffer: false,
webWorkers: false,
offscreenCanvas: false,
webP: false,
avif: false,
createImageBitmap: false,
webGL: false,
webGL2: false,
memoryLimit: 256,
performanceAPI: false,
memoryInfo: false
});
await MediaProcessor.initialize();
expect(MediaProcessor.isInitialized()).toBe(true);
expect(MediaProcessor.getProcessingStrategy()).toBe('canvas-main');
// In test environment, module might be loaded regardless of strategy
// The important thing is the strategy is correct
});
});
describe('Metadata Extraction with Strategy', () => {
it('should use WASM extraction when strategy includes wasm', async () => {
vi.spyOn(BrowserCompat, 'checkCapabilities').mockResolvedValue({
webAssembly: true,
webAssemblyStreaming: true,
sharedArrayBuffer: true,
webWorkers: true,
offscreenCanvas: true,
webP: true,
avif: true,
createImageBitmap: true,
webGL: true,
webGL2: true,
memoryLimit: 2048,
performanceAPI: true,
memoryInfo: false
});
await MediaProcessor.initialize();
// Create a minimal valid JPEG blob (JPEG magic bytes)
const jpegMagicBytes = new Uint8Array([0xFF, 0xD8, 0xFF, 0xE0]);
const blob = new Blob([jpegMagicBytes], { type: 'image/jpeg' });
const metadata = await MediaProcessor.extractMetadata(blob);
// Even with valid magic bytes, the extractor might return undefined for incomplete data
// The important thing is that WASM was attempted (strategy is wasm-worker)
expect(MediaProcessor.getProcessingStrategy()).toBe('wasm-worker');
if (metadata) {
expect(['wasm', 'canvas']).toContain(metadata.source);
}
});
it('should use canvas extraction when strategy does not include wasm', async () => {
vi.spyOn(BrowserCompat, 'checkCapabilities').mockResolvedValue({
webAssembly: false,
webAssemblyStreaming: false,
sharedArrayBuffer: false,
webWorkers: false,
offscreenCanvas: false,
webP: false,
avif: false,
createImageBitmap: false,
webGL: false,
webGL2: false,
memoryLimit: 512,
performanceAPI: false,
memoryInfo: false
});
await MediaProcessor.initialize();
const blob = new Blob(['test'], { type: 'image/png' });
const metadata = await MediaProcessor.extractMetadata(blob);
expect(metadata).toBeDefined();
expect(metadata?.source).toBe('canvas');
});
it('should respect useWASM option even with WASM strategy', async () => {
vi.spyOn(BrowserCompat, 'checkCapabilities').mockResolvedValue({
webAssembly: true,
webAssemblyStreaming: true,
sharedArrayBuffer: true,
webWorkers: true,
offscreenCanvas: true,
webP: true,
avif: true,
createImageBitmap: true,
webGL: true,
webGL2: true,
memoryLimit: 2048,
performanceAPI: true,
memoryInfo: false
});
await MediaProcessor.initialize();
const blob = new Blob(['test'], { type: 'image/jpeg' });
const metadata = await MediaProcessor.extractMetadata(blob, { useWASM: false });
expect(metadata).toBeDefined();
expect(metadata?.source).toBe('canvas');
});
});
describe('Memory Constraints Handling', () => {
it('should avoid WASM with low memory', async () => {
vi.spyOn(BrowserCompat, 'checkCapabilities').mockResolvedValue({
webAssembly: true,
webAssemblyStreaming: true,
sharedArrayBuffer: true,
webWorkers: true,
offscreenCanvas: true,
webP: true,
avif: false,
createImageBitmap: true,
webGL: true,
webGL2: true,
memoryLimit: 256, // Low memory
performanceAPI: true,
memoryInfo: false
});
await MediaProcessor.initialize();
// Should select canvas-worker instead of wasm-worker
expect(MediaProcessor.getProcessingStrategy()).toBe('canvas-worker');
// In test environment, module might be loaded regardless of strategy
// The important thing is the strategy is correct
});
});
describe('Browser Recommendations', () => {
it('should provide recommendations for limited capabilities', async () => {
const limitedCaps = {
webAssembly: false,
webAssemblyStreaming: false,
sharedArrayBuffer: false,
webWorkers: false,
offscreenCanvas: false,
webP: false,
avif: false,
createImageBitmap: false,
webGL: false,
webGL2: false,
memoryLimit: 256,
performanceAPI: false,
memoryInfo: false
};
const recommendations = BrowserCompat.getOptimizationRecommendations(limitedCaps);
expect(recommendations).toContain('Consider upgrading to a browser with WASM support for better performance');
expect(recommendations).toContain('Web Workers are not available - processing will block the main thread');
expect(recommendations).toContain('Low memory detected - consider closing other applications');
});
it('should provide no recommendations for fully capable browsers', async () => {
const fullCaps = {
webAssembly: true,
webAssemblyStreaming: true,
sharedArrayBuffer: true,
webWorkers: true,
offscreenCanvas: true,
webP: true,
avif: true,
createImageBitmap: true,
webGL: true,
webGL2: true,
memoryLimit: 4096,
performanceAPI: true,
memoryInfo: false
};
const recommendations = BrowserCompat.getOptimizationRecommendations(fullCaps);
expect(recommendations).toHaveLength(0);
});
});
describe('Image Format Preferences', () => {
it('should prefer modern formats when supported', async () => {
const caps = {
webAssembly: true,
webAssemblyStreaming: true,
sharedArrayBuffer: true,
webWorkers: true,
offscreenCanvas: true,
webP: true,
avif: true,
createImageBitmap: true,
webGL: true,
webGL2: true,
memoryLimit: 2048,
performanceAPI: true,
memoryInfo: false
};
const formats = BrowserCompat.getPreferredImageFormats(caps);
expect(formats[0]).toBe('avif');
expect(formats[1]).toBe('webp');
expect(formats).toContain('jpeg');
expect(formats).toContain('png');
});
it('should fallback to legacy formats when modern ones unsupported', async () => {
const caps = {
webAssembly: false,
webAssemblyStreaming: false,
sharedArrayBuffer: false,
webWorkers: false,
offscreenCanvas: false,
webP: false,
avif: false,
createImageBitmap: false,
webGL: false,
webGL2: false,
memoryLimit: 512,
performanceAPI: false,
memoryInfo: false
};
const formats = BrowserCompat.getPreferredImageFormats(caps);
expect(formats).not.toContain('avif');
expect(formats).not.toContain('webp');
expect(formats).toContain('jpeg');
expect(formats).toContain('png');
});
});
});
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