implemented a lot of features

tests/unit/nntp_group.spec.ts

@@ -0,0 +1,18 @@
+import { test } from '@japa/runner'
+import { parseGroupResponse } from '#lib/nntp/group'
+
+test.group('nntp / parseGroupResponse', () => {
+  test('parses the reply from news.eweka.nl', ({ assert }) => {
+    // Captured 2026-09-27. count == last - first + 1, so the field order is standard.
+    assert.deepEqual(parseGroupResponse('211 27275164317 266599 27275430915 alt.binaries.test'), {
+      count: 27275164317n,
+      first: 266599n,
+      last: 27275430915n,
+      name: 'alt.binaries.test',
+    })
+  })
+
+  test('rejects non-211 replies', ({ assert }) => {
+    assert.throws(() => parseGroupResponse('411 No such group'), /Unexpected GROUP response/)
+  })
+})