Initial AI manga platform

backend/src/novels/novel-parser.service.spec.ts

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+import { BadRequestException } from '@nestjs/common';
+import { describe, expect, it } from 'vitest';
+import { NovelParserService } from './novel-parser.service';
+
+describe('NovelParserService', () => {
+  const service = new NovelParserService();
+
+  it('extracts plain text buffers', async () => {
+    const result = await service.extractText(
+      'local://novels/test.txt',
+      'text/plain',
+      Buffer.from('第1章 开始\n这是正文。')
+    );
+
+    expect(result.extractor).toBe('plain_text');
+    expect(result.text).toContain('这是正文');
+  });
+
+  it('cleans text and splits chapters by headings', () => {
+    const parsed = service.parseText(`
+第1章 重生
+她在暴雨里醒来，决定重新夺回属于自己的事业。
+https://example.com
+
+第二章 反击
+会议室里，所有人都等着看她出错，她却拿出了完整方案。
+`);
+
+    expect(parsed.chapter_count).toBe(2);
+    expect(parsed.parse_report.strategy).toBe('heading');
+    expect(parsed.parse_report.removed_line_count).toBe(1);
+    expect(parsed.chapters[0].title).toBe('第1章 重生');
+    expect(parsed.chapters[1].content).toContain('完整方案');
+  });
+
+  it('falls back to chunk splitting when headings are missing', () => {
+    const parsed = service.parseText(
+      '她醒来时，窗外正在下雨。她意识到命运已经重新开始，于是把所有证据重新整理，准备迎接第一场反击。'
+    );
+
+    expect(parsed.chapter_count).toBe(1);
+    expect(parsed.parse_report.strategy).toBe('word_chunk');
+    expect(parsed.parse_report.warnings[0]).toContain('按字数切分');
+  });
+
+  it('rejects text that is too short', () => {
+    expect(() => service.parseText('太短')).toThrow(BadRequestException);
+  });
+});