Updated tests with localization

test/offline-cache.test.js

@@ -400,7 +400,10 @@ test('storage gauge uses browser estimate, separates Local Storage and reports q
   const usage = context.Wegwichtel.StorageUsage;
   await usage.refresh();
   assert.equal(elements.get('[data-storage-site-meter]').value, 95 * 1024 * 1024);
-  assert.match(elements.get('[data-storage-site-text]').textContent, /95 %.*5,2 MB frei.*Fast voll/);
+  const freeSpace = (5 * 1024 * 1024 / 1000000).toLocaleString('de', { maximumFractionDigits: 1 });
+  const siteText = elements.get('[data-storage-site-text]').textContent;
+  assert.match(siteText, /95 %.*Fast voll/);
+  assert.ok(siteText.includes(`${freeSpace} MB frei`), siteText);
   assert.match(elements.get('[data-storage-local-text]').textContent, /Richtwert.*wirklich hineinpasst/);
   usage.reportError({ cause: { name: 'QuotaExceededError' } });
   await usage.refresh();
@@ -409,3 +412,34 @@ test('storage gauge uses browser estimate, separates Local Storage and reports q
   await usage.refresh();
   assert.equal(elements.get('[data-storage-site-meter]').hidden, true);
 });
+
+test('storage gauge uses the selected language with both localized and fallback number formatting', async () => {
+  const source = await fs.readFile(path.join(root, 'public/js/storage-usage.js'), 'utf8');
+  for (const decimalSeparator of [',', '.']) {
+    const label = {};
+    const calls = [];
+    const context = {
+      document: { querySelectorAll: selector => selector === '[data-storage-usage]' ? [{
+        querySelector: selector => selector === '[data-storage-site-text]' ? label : null
+      }] : [] },
+      navigator: { storage: { estimate: async () => ({ usage: 95 * 1024 * 1024, quota: 100 * 1024 * 1024 }) } },
+      formatNumber(value, language, options) {
+        calls.push({ value, language, options });
+        return value.toFixed(1).replace('.', decimalSeparator);
+      }
+    };
+    const i18n = await loadI18n(context);
+    // Model a runner whose Intl data falls back to a dot, without changing host globals.
+    vm.runInNewContext('Number.prototype.toLocaleString = function (language, options) { return formatNumber(Number(this), language, options); };', context);
+    vm.runInNewContext(source, context);
+    await context.Wegwichtel.StorageUsage.refresh();
+    assert.ok(label.textContent.includes(`5${decimalSeparator}2 MB frei`));
+    assert.equal(calls[0].language, 'de');
+    assert.equal(calls[0].options.maximumFractionDigits, 1);
+    assert.equal(calls[0].value, 5 * 1024 * 1024 / 1000000);
+    i18n.register('en', {});
+    i18n.setLanguage('en', null);
+    await context.Wegwichtel.StorageUsage.refresh();
+    assert.equal(calls.at(-1).language, 'en');
+  }
+});