What is Laravel Testing?
Why Interviewers Ask This
This tests whether you can apply Laravel knowledge to real-world scenarios. Interviewers are looking for clarity of thought and evidence that you've encountered this in production code.
Answer
Laravel has excellent built-in testing support via PHPUnit and Pest. Feature tests test HTTP endpoints: $this->get("/home")->assertStatus(200)->assertSee("Welcome"). $this->actingAs($user)->post("/posts", $data)->assertRedirect("/posts"). Unit tests test individual classes in isolation. Database testing: use RefreshDatabase or DatabaseTransactions traits to reset state between tests. Create test data: User::factory()->create(). Mock dependencies: Mail::fake(), Event::fake(), Queue::fake(), Notification::fake(), Storage::fake(). Assert they were triggered: Mail::assertSent(WelcomeEmail::class). Run tests: php artisan test or vendor/bin/phpunit. Pest (a modern PHP testing framework) is now the default in new Laravel apps.
Common Mistake
A common mistake is memorizing definitions without understanding implications. When asked this question, go one level deeper — explain what happens when this concept is misused or ignored.