// resize-image.test.js import { resizeImage } from '@shared/utils/resize-image'; describe('resizeImage', () => { beforeEach(() => { Object.defineProperty(global.Image.prototype, 'src', { set() { setTimeout(() => { this.width = 500; this.height = 500; this.onload(); }, 10); }, }); HTMLCanvasElement.prototype.getContext = () => ({ clearRect: jest.fn(), drawImage: jest.fn(), }); HTMLCanvasElement.prototype.toBlob = (callback, type) => { callback(new Blob(['mock'], { type })); }; global.URL.createObjectURL = jest.fn( () => 'blob:http://example.com/fake-url', ); }); afterEach(() => { delete global.URL.createObjectURL; }); it('should resize image and return a blob URL', async () => { const result = await resizeImage('http://example.com/img.png', { size: { width: 64, height: 64 }, mimeType: 'image/png', }); expect(typeof result).toBe('string'); expect(result).toBe('blob:http://example.com/fake-url'); expect(global.URL.createObjectURL).toHaveBeenCalledWith(expect.any(Blob)); }); it('should throw if imageUrl is missing', async () => { await expect( resizeImage(null, { width: 64, height: 64 }, 'image/png'), ).rejects.toThrow('Invalid imageUrl or size dimensions'); }); it('should throw if size is missing', async () => { await expect(resizeImage('http://example.com/img.png', {})).rejects.toThrow( 'Invalid imageUrl or size dimensions', ); }); it('should throw if size is not an object', async () => { await expect( resizeImage('http://example.com/img.png', 64, 'image/png'), ).rejects.toThrow('Invalid imageUrl or size dimensions'); }); it('should throw if width or height are not valid numbers', async () => { await expect( resizeImage('http://example.com/img.png', { width: 0, height: 64 }), ).rejects.toThrow('Invalid imageUrl or size dimensions'); await expect( resizeImage('http://example.com/img.png', { width: 64, height: -1 }), ).rejects.toThrow('Invalid imageUrl or size dimensions'); await expect( resizeImage('http://example.com/img.png', { width: '64', height: 64 }), ).rejects.toThrow('Invalid imageUrl or size dimensions'); }); });