143 lines
3.0 KiB
TypeScript
143 lines
3.0 KiB
TypeScript
import { describe, expect, it } from 'vitest';
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import { probeImageFileDimensions } from './ImageCanvasFileModel';
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function makeFile(bytes: number[], name: string, type: string) {
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return new File([new Uint8Array(bytes)], name, { type });
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}
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function uint16be(value: number) {
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return [(value >> 8) & 0xff, value & 0xff];
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}
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function uint32be(value: number) {
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return [
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(value >> 24) & 0xff,
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(value >> 16) & 0xff,
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(value >> 8) & 0xff,
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value & 0xff,
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];
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}
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function uint16le(value: number) {
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return [value & 0xff, (value >> 8) & 0xff];
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}
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function uint24le(value: number) {
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return [value & 0xff, (value >> 8) & 0xff, (value >> 16) & 0xff];
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}
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function uint32le(value: number) {
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return [
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value & 0xff,
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(value >> 8) & 0xff,
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(value >> 16) & 0xff,
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(value >> 24) & 0xff,
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];
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}
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describe('ImageCanvasFileModel', () => {
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it('probes common upload image dimensions from file headers', async () => {
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const png = makeFile(
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[
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0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a,
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...uint32be(13),
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0x49, 0x48, 0x44, 0x52,
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...uint32be(1536),
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...uint32be(1024),
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8,
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6,
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0,
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0,
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0,
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],
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'画布.png',
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'image/png',
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);
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const jpeg = makeFile(
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[
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0xff, 0xd8,
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0xff, 0xe0,
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...uint16be(16),
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0x4a, 0x46, 0x49, 0x46,
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0, 1, 1, 0, 0, 1, 0, 1, 0, 0,
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0xff, 0xc0,
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...uint16be(17),
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8,
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...uint16be(720),
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...uint16be(1280),
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3,
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0, 0, 0, 0, 0, 0, 0, 0, 0,
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],
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'画布.jpg',
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'image/jpeg',
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);
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const gif = makeFile(
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[
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0x47, 0x49, 0x46, 0x38, 0x39, 0x61,
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...uint16le(640),
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...uint16le(480),
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0,
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0,
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0,
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],
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'画布.gif',
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'image/gif',
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);
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const webp = makeFile(
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[
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0x52, 0x49, 0x46, 0x46,
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...uint32le(22),
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0x57, 0x45, 0x42, 0x50,
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0x56, 0x50, 0x38, 0x58,
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...uint32le(10),
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0,
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0,
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0,
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0,
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...uint24le(799),
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...uint24le(599),
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],
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'画布.webp',
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'image/webp',
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);
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const bmp = makeFile(
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[
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0x42, 0x4d,
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...uint32le(54),
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0,
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0,
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0,
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0,
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...uint32le(54),
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...uint32le(40),
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...uint32le(300),
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...uint32le(200),
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],
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'画布.bmp',
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'image/bmp',
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);
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await expect(probeImageFileDimensions(png)).resolves.toEqual({
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width: 1536,
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height: 1024,
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});
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await expect(probeImageFileDimensions(jpeg)).resolves.toEqual({
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width: 1280,
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height: 720,
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});
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await expect(probeImageFileDimensions(gif)).resolves.toEqual({
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width: 640,
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height: 480,
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});
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await expect(probeImageFileDimensions(webp)).resolves.toEqual({
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width: 800,
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height: 600,
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});
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await expect(probeImageFileDimensions(bmp)).resolves.toEqual({
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width: 300,
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height: 200,
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});
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});
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});
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