52ae0c5802
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31 lines
1.7 KiB
TypeScript
31 lines
1.7 KiB
TypeScript
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(); // eslint-disable-line no-restricted-properties -- decodes a data URI, the fetch wrapper adds nothing here
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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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