Strengthen tests: fail without solution (comments, undefined)

Comments test now asserts a TODO comment is present; undefined test asserts console.log was called with an undefined argument.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: fey

modules/10-basics/20-comments/test.js

@@ -1,3 +1,12 @@
 // @ts-check
 
-import './index.js';
+import { readFileSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
+import { expect, test } from 'vitest';
+
+test('comments', () => {
+  const code = readFileSync(fileURLToPath(new URL('./index.js', import.meta.url)), 'utf-8');
+
+  // В коде должен быть хотя бы один строчный TODO-комментарий
+  expect(code).toMatch(/\/\/\s*TODO/i);
+});

modules/33-data-types/45-undefined/test.js

@@ -2,11 +2,13 @@
 
 import { expect, test, vi } from 'vitest';
 
-test('hello world', async () => {
+test('undefined', async () => {
   const consoleLogSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
   await import('./index.js');
 
-  const firstArg = consoleLogSpy.mock.calls[0]?.[0];
-
-  expect(firstArg).toBe(undefined);
+  // console.log должен быть вызван, и ему должен быть передан аргумент undefined
+  expect(consoleLogSpy).toHaveBeenCalled();
+  const [firstCall] = consoleLogSpy.mock.calls;
+  expect(firstCall.length).toBeGreaterThan(0);
+  expect(firstCall[0]).toBe(undefined);
 });