code.gitea.io/gitea@v1.22.3/web_src/js/utils/image.test.js (about)

     1  import {pngChunks, imageInfo} from './image.js';
     2  
     3  const pngNoPhys = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAAAAAA6fptVAAAADUlEQVQIHQECAP3/AAAAAgABzePRKwAAAABJRU5ErkJggg==';
     4  const pngPhys = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAACXBIWXMAABYlAAAWJQFJUiTwAAAAEElEQVQI12OQNZcAIgYIBQAL8gGxdzzM0A==';
     5  const pngEmpty = 'data:image/png;base64,';
     6  
     7  async function dataUriToBlob(datauri) {
     8    return await (await globalThis.fetch(datauri)).blob();
     9  }
    10  
    11  test('pngChunks', async () => {
    12    expect(await pngChunks(await dataUriToBlob(pngNoPhys))).toEqual([
    13      {name: 'IHDR', data: new Uint8Array([0, 0, 0, 1, 0, 0, 0, 1, 8, 0, 0, 0, 0])},
    14      {name: 'IDAT', data: new Uint8Array([8, 29, 1, 2, 0, 253, 255, 0, 0, 0, 2, 0, 1])},
    15      {name: 'IEND', data: new Uint8Array([])},
    16    ]);
    17    expect(await pngChunks(await dataUriToBlob(pngPhys))).toEqual([
    18      {name: 'IHDR', data: new Uint8Array([0, 0, 0, 2, 0, 0, 0, 2, 8, 2, 0, 0, 0])},
    19      {name: 'pHYs', data: new Uint8Array([0, 0, 22, 37, 0, 0, 22, 37, 1])},
    20      {name: 'IDAT', data: new Uint8Array([8, 215, 99, 144, 53, 151, 0, 34, 6, 8, 5, 0, 11, 242, 1, 177])},
    21    ]);
    22    expect(await pngChunks(await dataUriToBlob(pngEmpty))).toEqual([]);
    23  });
    24  
    25  test('imageInfo', async () => {
    26    expect(await imageInfo(await dataUriToBlob(pngNoPhys))).toEqual({width: 1, dppx: 1});
    27    expect(await imageInfo(await dataUriToBlob(pngPhys))).toEqual({width: 2, dppx: 2});
    28    expect(await imageInfo(await dataUriToBlob(pngEmpty))).toEqual({width: 0, dppx: 1});
    29  });