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