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30 lines
1.6 KiB
30 lines
1.6 KiB
import {pngChunks, imageInfo} from './image.ts'; |
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const pngNoPhys = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAAAAAA6fptVAAAADUlEQVQIHQECAP3/AAAAAgABzePRKwAAAABJRU5ErkJggg=='; |
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const pngPhys = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAACXBIWXMAABYlAAAWJQFJUiTwAAAAEElEQVQI12OQNZcAIgYIBQAL8gGxdzzM0A=='; |
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const pngEmpty = 'data:image/png;base64,'; |
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async function dataUriToBlob(datauri: string) { |
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return await (await globalThis.fetch(datauri)).blob(); |
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} |
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test('pngChunks', async () => { |
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expect(await pngChunks(await dataUriToBlob(pngNoPhys))).toEqual([ |
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{name: 'IHDR', data: new Uint8Array([0, 0, 0, 1, 0, 0, 0, 1, 8, 0, 0, 0, 0])}, |
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{name: 'IDAT', data: new Uint8Array([8, 29, 1, 2, 0, 253, 255, 0, 0, 0, 2, 0, 1])}, |
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{name: 'IEND', data: new Uint8Array([])}, |
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]); |
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expect(await pngChunks(await dataUriToBlob(pngPhys))).toEqual([ |
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{name: 'IHDR', data: new Uint8Array([0, 0, 0, 2, 0, 0, 0, 2, 8, 2, 0, 0, 0])}, |
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{name: 'pHYs', data: new Uint8Array([0, 0, 22, 37, 0, 0, 22, 37, 1])}, |
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{name: 'IDAT', data: new Uint8Array([8, 215, 99, 144, 53, 151, 0, 34, 6, 8, 5, 0, 11, 242, 1, 177])}, |
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]); |
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expect(await pngChunks(await dataUriToBlob(pngEmpty))).toEqual([]); |
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}); |
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test('imageInfo', async () => { |
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expect(await imageInfo(await dataUriToBlob(pngNoPhys))).toEqual({width: 1, dppx: 1}); |
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expect(await imageInfo(await dataUriToBlob(pngPhys))).toEqual({width: 2, dppx: 2}); |
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expect(await imageInfo(await dataUriToBlob(pngEmpty))).toEqual({width: 0, dppx: 1}); |
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expect(await imageInfo(await dataUriToBlob(`data:image/gif;base64,`))).toEqual({}); |
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});
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