Add report exports

tests/Unit/Service/IntervalServiceTest.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit\Service;
+
+use App\Service\IntervalService;
+use Carbon\CarbonInterval;
+use Tests\TestCase;
+
+class IntervalServiceTest extends TestCase
+{
+    public function test_format_returns_correctly_formatted_interval(): void
+    {
+        // Arrange
+        $intervalService = app(IntervalService::class);
+        $interval = CarbonInterval::seconds(123456789123);
+
+        // Act
+        $result = $intervalService->format($interval);
+
+        // Assert
+        $this->assertEquals('34293552:32:03', $result);
+    }
+}