/laravel-tdd

name: laravel-tdd
description: Test-driven development for Laravel with PHPUnit and Pest, factories, database testing, fakes, and coverage targets.
origin: ECC

Laravel TDD Workflow

Test-driven development for Laravel applications using PHPUnit and Pest with 80%+ coverage (unit + feature).

When to Use

• New features or endpoints in Laravel
• Bug fixes or refactors
• Testing Eloquent models, policies, jobs, and notifications
• Prefer Pest for new tests unless the project already standardizes on PHPUnit

How It Works

Red-Green-Refactor Cycle

1) Write a failing test 2) Implement the minimal change to pass 3) Refactor while keeping tests green

Test Layers

• **Unit**: pure PHP classes, value objects, services
• **Feature**: HTTP endpoints, auth, validation, policies
• **Integration**: database + queue + external boundaries

Choose layers based on scope:

• Use **Unit** tests for pure business logic and services.
• Use **Feature** tests for HTTP, auth, validation, and response shape.
• Use **Integration** tests when validating DB/queues/external services together.

Database Strategy

• `RefreshDatabase` for most feature/integration tests (runs migrations once per test run, then wraps each test in a transaction when supported; in-memory databases may re-migrate per test)
• `DatabaseTransactions` when the schema is already migrated and you only need per-test rollback
• `DatabaseMigrations` when you need a full migrate/fresh for every test and can afford the cost

Use `RefreshDatabase` as the default for tests that touch the database: for databases with transaction support, it runs migrations once per test run (via a static flag) and wraps each test in a transaction; for `:memory:` SQLite or connections without transactions, it migrates before each test. Use `DatabaseTransactions` when the schema is already migrated and you only need per-test rollbacks.

Testing Framework Choice

• Default to **Pest** for new tests when available.
• Use **PHPUnit** only if the project already standardizes on it or requires PHPUnit-specific tooling.

Examples

PHPUnit Example

use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

final class ProjectControllerTest extends TestCase
{
    use RefreshDatabase;

    public function test_owner_can_create_project(): void
    {
        $user = User::factory()->create();

        $response = $this->actingAs($user)->postJson('/api/projects', [
            'name' => 'New Project',
        ]);

        $response->assertCreated();
        $this->assertDatabaseHas('projects', ['name' => 'New Project']);
    }
}

Feature Test Example (HTTP Layer)

use App\Models\Project;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

final class ProjectIndexTest extends TestCase
{
    use RefreshDatabase;

    public function test_projects_index_returns_paginated_results(): void
    {
        $user = User::factory()->create();
        Project::factory()->count(3)->for($user)->create();

        $response = $this->actingAs($user)->getJson('/api/projects');

        $response->assertOk();
        $response->assertJsonStructure(['success', 'data', 'error', 'meta']);
    }
}

Pest Example

use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;

use function Pest\Laravel\actingAs;
use function Pest\Laravel\assertDatabaseHas;

uses(RefreshDatabase::class);

test('owner can create project', function () {
    $user = User::factory()->create();

    $response = actingAs($user)->postJson('/api/projects', [
        'name' => 'New Project',
    ]);

    $response->assertCreated();
    assertDatabaseHas('projects', ['name' => 'New Project']);
});

Feature Test Pest Example (HTTP Layer)

use App\Models\Project;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;

use function Pest\Laravel\actingAs;

uses(RefreshDatabase::class);

test('projects index returns paginated results', function () {
    $user = User::factory()->create();
    Project::factory()->count(3)->for($user)->create();

    $response = actingAs($user)->getJson('/api/projects');

    $response->assertOk();
    $response->assertJsonStructure(['success', 'data', 'error', 'meta']);
});

Factories and States

• Use factories for test data
• Define states for edge cases (archived, admin, trial)

$user = User::factory()->state(['role' => 'admin'])->create();

Database Testing

• Use `RefreshDatabase` for clean state
• Keep tests isolated and deterministic
• Prefer `assertDatabaseHas` over manual queries

Persistence Test Example

use App\Models\Project;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

final class ProjectRepositoryTest extends TestCase
{
    use RefreshDatabase;

    public function test_project_can_be_retrieved_by_slug(): void
    {
        $project = Project::factory()->create(['slug' => 'alpha']);

        $found = Project::query()->where('slug', 'alpha')->firstOrFail();

        $this->assertSame($project->id, $found->id);
    }
}

Fakes for Side Effects

• `Bus::fake()` for jobs
• `Queue::fake()` for queued work
• `Mail::fake()` and `Notification::fake()` for notifications
• `Event::fake()` for domain events

use Illuminate\Support\Facades\Queue;

Queue::fake();

dispatch(new SendOrderConfirmation($order->id));

Queue::assertPushed(SendOrderConfirmation::class);

use Illuminate\Support\Facades\Notification;

Notification::fake();

$user->notify(new InvoiceReady($invoice));

Notification::assertSentTo($user, InvoiceReady::class);

Auth Testing (Sanctum)

use Laravel\Sanctum\Sanctum;

Sanctum::actingAs($user);

$response = $this->getJson('/api/projects');
$response->assertOk();

HTTP and External Services

• Use `Http::fake()` to isolate external APIs
• Assert outbound payloads with `Http::assertSent()`

Cov