feat: slugify, rate limit ed env helper con test

tests/rate-limit.test.ts

@@ -0,0 +1,23 @@
+import { describe, it, expect, vi, afterEach } from 'vitest';
+import { rateLimit, _resetBuckets } from '../src/lib/rate-limit';
+
+afterEach(() => { _resetBuckets(); vi.useRealTimers(); });
+
+describe('rateLimit', () => {
+  it('consente fino a max richieste', () => {
+    expect(rateLimit('a', 2, 1000)).toBe(true);
+    expect(rateLimit('a', 2, 1000)).toBe(true);
+    expect(rateLimit('a', 2, 1000)).toBe(false);
+  });
+  it('chiavi indipendenti', () => {
+    expect(rateLimit('a', 1, 1000)).toBe(true);
+    expect(rateLimit('b', 1, 1000)).toBe(true);
+  });
+  it('la finestra scade', () => {
+    vi.useFakeTimers();
+    expect(rateLimit('a', 1, 1000)).toBe(true);
+    expect(rateLimit('a', 1, 1000)).toBe(false);
+    vi.advanceTimersByTime(1100);
+    expect(rateLimit('a', 1, 1000)).toBe(true);
+  });
+});

tests/slug.test.ts

@@ -0,0 +1,20 @@
+import { describe, it, expect } from 'vitest';
+import { slugify } from '../src/lib/slug';
+
+describe('slugify', () => {
+  it('minuscole e trattini', () => {
+    expect(slugify('Il Metodo InsanityLab')).toBe('il-metodo-insanitylab');
+  });
+  it('rimuove accenti', () => {
+    expect(slugify('Attività fisica è già qui')).toBe('attivita-fisica-e-gia-qui');
+  });
+  it('comprime simboli e spazi multipli', () => {
+    expect(slugify('Blog & Edugo -- news!!')).toBe('blog-edugo-news');
+  });
+  it('niente trattini ai bordi', () => {
+    expect(slugify('  ciao  ')).toBe('ciao');
+  });
+  it('stringa vuota resta vuota', () => {
+    expect(slugify('')).toBe('');
+  });
+});