90 lines
2.6 KiB
TypeScript
90 lines
2.6 KiB
TypeScript
/**
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* AriaEngine CRC32 单元测试
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*/
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import { crc32, crc32Continue } from '../../src/engine/aria/crc32';
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const enc = new TextEncoder();
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function bytes(s: string): Uint8Array {
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return enc.encode(s);
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}
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describe('CRC32', () => {
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test('标准测试向量：空串 = 0', () => {
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expect(crc32(new Uint8Array(0))).toBe(0x00000000);
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});
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test('标准测试向量：123456789 = 0xCBF43926（IEEE 802.3 参考值）', () => {
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expect(crc32(bytes('123456789'))).toBe(0xcbf43926);
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});
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test('标准测试向量：The quick brown fox... = 0x414FA339', () => {
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expect(crc32(bytes('The quick brown fox jumps over the lazy dog'))).toBe(0x414fa339);
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});
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test('确定性：相同输入多次计算一致', () => {
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const data = bytes('metona-sqlark aria engine');
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const a = crc32(data);
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const b = crc32(data);
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expect(a).toBe(b);
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});
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test('区分性：不同输入不同校验和', () => {
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expect(crc32(bytes('hello'))).not.toBe(crc32(bytes('hellp')));
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expect(crc32(bytes('abc'))).not.toBe(crc32(bytes('abd')));
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});
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test('单字节翻转可被检测', () => {
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const original = bytes('metona-sqlark aria engine');
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const flipped = new Uint8Array(original);
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flipped[10] ^= 0xff;
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expect(crc32(original)).not.toBe(crc32(flipped));
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});
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test('分段计算与一次性计算一致（crc32Continue）', () => {
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const data = bytes('The quick brown fox jumps over the lazy dog');
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const whole = crc32(data);
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// 按 1 字节分段
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let seg = 0;
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for (let i = 0; i < data.length; i++) {
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seg = crc32Continue(seg, data.subarray(i, i + 1));
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}
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expect(seg).toBe(whole);
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// 按 5 字节分段
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let seg2 = 0;
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for (let i = 0; i < data.length; i += 5) {
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seg2 = crc32Continue(seg2, data.subarray(i, i + 5));
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}
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expect(seg2).toBe(whole);
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});
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test('seed 参数与 crc32Continue 等价', () => {
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const data = bytes('metona-sqlark aria engine');
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const head = data.subarray(0, 7);
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const tail = data.subarray(7);
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const whole = crc32(data);
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const split = crc32(tail, crc32(head));
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expect(split).toBe(whole);
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});
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test('中文 UTF-8 字节正确参与计算', () => {
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const data = bytes('玥玥的测试数据：大段中文内容');
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expect(crc32(data)).toBe(crc32(new Uint8Array(data)));
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});
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test('大缓冲区（1MB 随机字节）稳定计算', () => {
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const data = new Uint8Array(1024 * 1024);
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let x = 12345;
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for (let i = 0; i < data.length; i++) {
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x = (x * 1103515245 + 12345) & 0x7fffffff;
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data[i] = x & 0xff;
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}
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const a = crc32(data);
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const b = crc32(data);
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expect(a).toBe(b);
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expect(a).not.toBe(0);
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});
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});
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