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Maurice
6c4d743259
The book card e2e calls the book services inside a request context, the preview expects the design id beside the operations, a trial without a book has no version, the JPEG fixture keeps its signature, and the upload test checks the file name where the client sets it.
59 lines
2.3 KiB
TypeScript
59 lines
2.3 KiB
TypeScript
import { readImageHeader } from '../../../../src/nest/common/image-header';
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import { describe, expect, it } from 'vitest';
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/** SOI, then the given segments, then a baseline frame header of w x h. */
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function jpeg(w: number, h: number, ...before: number[][]): Buffer {
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const sof = Buffer.alloc(19);
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sof.writeUInt16BE(0xffc0, 0);
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sof.writeUInt16BE(17, 2);
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sof.writeUInt8(8, 4);
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sof.writeUInt16BE(h, 5);
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sof.writeUInt16BE(w, 7);
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return Buffer.concat([Buffer.from([0xff, 0xd8]), ...before.map((bytes) => Buffer.from(bytes)), sof]);
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}
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function webp(chunk: string, length: number): Buffer {
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const out = Buffer.alloc(length);
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out.write('RIFF', 0, 'latin1');
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out.write('WEBP', 8, 'latin1');
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out.write(chunk, 12, 'latin1');
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return out;
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}
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describe('readImageHeader', () => {
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it('IMGHDR-001: steps over stray bytes, fill bytes and the markers that carry no length', () => {
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// A JPEG opens with SOI and a marker (FF D8 FF); the stray bytes come between segments, after the first one.
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const segments = [
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[0xff, 0xe1, 0x00, 0x04, 0, 0],
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[0x00, 0x12],
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[0xff, 0xff],
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[0xff, 0x01],
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[0xff, 0xd0],
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];
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expect(readImageHeader(jpeg(800, 600, ...segments))).toEqual({ mimeType: 'image/jpeg', width: 800, height: 600 });
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});
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it('IMGHDR-002: a JPEG whose segment length is broken, or whose frame header is cut, says no size', () => {
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expect(readImageHeader(Buffer.from([0xff, 0xd8, 0xff, 0xe0, 0x00, 0x01, 0, 0]))).toBeNull();
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expect(readImageHeader(Buffer.from([0xff, 0xd8, 0xff, 0xc0, 0x00, 0x11, 8, 0]))).toBeNull();
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expect(readImageHeader(Buffer.from([0xff, 0xd8, 0xff, 0xda, 0x00, 0x08]))).toBeNull();
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expect(readImageHeader(jpeg(0, 600))).toBeNull();
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});
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it('IMGHDR-003: a WebP too short for its chunk, or with a chunk it does not know, says no size', () => {
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expect(readImageHeader(webp('VP8 ', 20))).toBeNull();
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expect(readImageHeader(webp('VP8L', 22))).toBeNull();
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expect(readImageHeader(webp('VP8X', 26))).toBeNull();
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expect(readImageHeader(webp('ALPH', 30))).toBeNull();
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});
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it('IMGHDR-004: a PNG signature without its IHDR chunk is no PNG', () => {
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const data = Buffer.alloc(24);
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data.writeUInt32BE(0x89504e47, 0);
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data.write('IDAT', 12, 'latin1');
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expect(readImageHeader(data)).toBeNull();
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expect(readImageHeader(Buffer.from([0xff, 0xd8]))).toBeNull();
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});
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});
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