test(e2e): verify monospace font embeds into PDF/DOCX/EPUB/HTML

tests/smoke-e2e-monospace.test.js

@@ -0,0 +1,98 @@
+/**
+ * E2E smoke for monospace embedding. Runs against the vendored fonts when
+ * available. If pandoc is missing, the PDF-specific test is skipped; the
+ * DOCX/EPUB/HTML tests exercise the JS modules directly and run either way.
+ */
+const { execFileSync } = require('child_process');
+const fs = require('fs');
+const path = require('path');
+const os = require('os');
+
+function ttfAvailable() {
+  const ttf = path.resolve(__dirname, '..', 'assets', 'fonts', 'JetBrainsMono-Regular.ttf');
+  return fs.existsSync(ttf);
+}
+
+function pandocAvailable() {
+  try {
+    execFileSync('pandoc', ['--version'], { stdio: 'ignore' });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+describe('monospace E2E', () => {
+  let tmp;
+
+  beforeAll(() => {
+    if (ttfAvailable()) {
+      tmp = fs.mkdtempSync(path.join(os.tmpdir(), 'mono-e2e-'));
+    }
+  });
+
+  afterAll(() => {
+    if (tmp) fs.rmSync(tmp, { recursive: true, force: true });
+  });
+
+  it('DOCX export embeds the TTF', async () => {
+    if (!ttfAvailable()) return;
+    const { embedDocxFont } = require('../src/main/DocxFontEmbedder');
+    const { getMonoFontTtfPath } = require('../src/main/MonospaceFontConfig');
+    const JSZip = require('jszip');
+    const zip = new JSZip();
+    zip.file(
+      '[Content_Types].xml',
+      '<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"></Types>'
+    );
+    fs.writeFileSync(path.join(tmp, 'in.docx'), await zip.generateAsync({ type: 'nodebuffer' }));
+    await embedDocxFont(
+      path.join(tmp, 'in.docx'),
+      path.join(tmp, 'out.docx'),
+      getMonoFontTtfPath('jetbrains-mono', 400),
+      'JetBrainsMono'
+    );
+    const out = await JSZip.loadAsync(fs.readFileSync(path.join(tmp, 'out.docx')));
+    const fonts = Object.keys(out.files).filter((n) => n.startsWith('word/fonts/'));
+    expect(fonts.length).toBeGreaterThan(0);
+  });
+
+  it('EPUB export args include --epub-embed-font', () => {
+    const { withEpubEmbedFontArgs } = require('../src/main/EpubFontEmbedder');
+    const args = withEpubEmbedFontArgs(
+      ['-o', 'out.epub', 'in.md'],
+      '/tmp/JetBrainsMono-Regular.ttf',
+      'JetBrains Mono'
+    );
+    expect(args).toContain('--epub-embed-font=/tmp/JetBrainsMono-Regular.ttf');
+  });
+
+  it('HTML CSS contains base64 font face', () => {
+    const { buildExportCss } = require('../src/main/ExportCss');
+    const woff2 = Buffer.from('woff2-test');
+    const css = buildExportCss(
+      { monospaceFont: 'jetbrains-mono', monospaceLigatures: true },
+      { woff2 }
+    );
+    const m = css.match(/base64,([A-Za-z0-9+/=]+)/);
+    expect(Buffer.from(m[1], 'base64').toString()).toBe('woff2-test');
+  });
+
+  (ttfAvailable() && pandocAvailable() ? it : it.skip)(
+    'PDF export references the monospace font (xelatex header)',
+    () => {
+      const { buildPdfFontHeader } = require('../src/main/PdfFontHeader');
+      const { getMonoFontTtfPath } = require('../src/main/MonospaceFontConfig');
+      const ttf = getMonoFontTtfPath('jetbrains-mono', 400);
+      const out = buildPdfFontHeader(
+        { monospaceFont: 'jetbrains-mono', monospaceLigatures: false },
+        ttf,
+        'JetBrains Mono'
+      );
+      const content = fs.readFileSync(out.headerPath, 'utf-8');
+      expect(content).toContain('\\setmonofont');
+      expect(content).toContain('JetBrainsMono-Regular.ttf');
+      fs.rmSync(out.dir, { recursive: true, force: true });
+    }
+  );
+});