Merge branch 'main' into states

# Conflicts:
#	app/Domain/CalendarGenerator.php
#	app/Domain/VacationRequestStateManager.php
#	app/Eloquent/Models/VacationRequest.php
#	app/Eloquent/Observers/VacationRequestObserver.php
#	composer.json
#	composer.lock
#	tests/Feature/VacationRequestTest.php

tests/Unit/VacationRequestNotificationTest.php

@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit;
+
+use Illuminate\Foundation\Testing\DatabaseMigrations;
+use Illuminate\Support\Carbon;
+use Illuminate\Support\Facades\Notification;
+use Tests\TestCase;
+use Tests\Traits\InteractsWithYearPeriods;
+use Toby\Domain\Enums\Role;
+use Toby\Domain\Enums\VacationType;
+use Toby\Domain\Notifications\VacationRequestWaitsForTechApprovalNotification;
+use Toby\Domain\States\VacationRequest\Created;
+use Toby\Domain\VacationRequestStateManager;
+use Toby\Eloquent\Models\User;
+use Toby\Eloquent\Models\VacationRequest;
+use Toby\Eloquent\Models\YearPeriod;
+
+class VacationRequestNotificationTest extends TestCase
+{
+    use DatabaseMigrations;
+    use InteractsWithYearPeriods;
+
+    protected VacationRequestStateManager $stateManager;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->stateManager = $this->app->make(VacationRequestStateManager::class);
+
+        $this->createCurrentYearPeriod();
+    }
+
+    public function testAfterChangingVacationRequestStateNotificationAreSentToUsers(): void
+    {
+        Notification::fake();
+
+        $user = User::factory([
+            "role" => Role::Employee,
+        ])->createQuietly();
+        $technicalApprover = User::factory([
+            "role" => Role::TechnicalApprover,
+        ])->createQuietly();
+        $administrativeApprover = User::factory([
+            "role" => Role::AdministrativeApprover,
+        ])->createQuietly();
+
+        $currentYearPeriod = YearPeriod::current();
+
+        /** @var VacationRequest $vacationRequest */
+        $vacationRequest = VacationRequest::factory([
+            "type" => VacationType::Vacation->value,
+            "state" => Created::class,
+            "from" => Carbon::create($currentYearPeriod->year, 2, 1)->toDateString(),
+            "to" => Carbon::create($currentYearPeriod->year, 2, 4)->toDateString(),
+            "comment" => "Comment for the vacation request.",
+        ])
+            ->for($user)
+            ->for($currentYearPeriod)
+            ->create();
+
+        $this->stateManager->waitForTechnical($vacationRequest);
+
+        Notification::assertSentTo($technicalApprover, VacationRequestWaitsForTechApprovalNotification::class);
+        Notification::assertNotSentTo([$user, $administrativeApprover], VacationRequestWaitsForTechApprovalNotification::class);
+    }
+}