test: Add unit test for eloquent tenant provider

tests/Unit/Providers/EloquentProviderTest.php

@@ -0,0 +1,71 @@
+<?php
+declare(strict_types=1);
+
+namespace Sprout\Tests\Unit\Providers;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use PHPUnit\Framework\Attributes\Test;
+use Sprout\Providers\EloquentTenantProvider;
+use Sprout\Tests\Unit\UnitTestCase;
+use Workbench\App\Models\TenantModel;
+use function Sprout\provider;
+
+class EloquentProviderTest extends UnitTestCase
+{
+    use RefreshDatabase;
+
+    protected function defineEnvironment($app): void
+    {
+        tap($app['config'], static function ($config) {
+            $config->set('multitenancy.providers.tenants.model', TenantModel::class);
+        });
+    }
+
+    #[Test]
+    public function hasARegisteredName(): void
+    {
+        $provider = provider('tenants');
+
+        $this->assertInstanceOf(EloquentTenantProvider::class, $provider);
+        $this->assertSame('tenants', $provider->getName());
+    }
+
+    #[Test]
+    public function hasAModelClass(): void
+    {
+        $provider = provider('tenants');
+
+        $this->assertInstanceOf(EloquentTenantProvider::class, $provider);
+        $this->assertSame(TenantModel::class, $provider->getModelClass());
+    }
+
+    #[Test]
+    public function retrievesTenantsByTheirIdentifier(): void
+    {
+        $provider = provider('tenants');
+
+        $tenant = TenantModel::factory()->createOne();
+
+        $found = $provider->retrieveByIdentifier($tenant->getTenantIdentifier());
+
+        $this->assertNotNull($found);
+        $this->assertTrue($tenant->is($found));
+
+        $this->assertNull($provider->retrieveByIdentifier('fake-identifier'));
+    }
+
+    #[Test]
+    public function retrievesTenantsByTheirKey(): void
+    {
+        $provider = provider('tenants');
+
+        $tenant = TenantModel::factory()->createOne();
+
+        $found = $provider->retrieveByKey($tenant->getTenantKey());
+
+        $this->assertNotNull($found);
+        $this->assertTrue($tenant->is($found));
+
+        $this->assertNull($provider->retrieveByKey(-999));
+    }
+}