Add some tests.

tests/integration/Api/Chart/CategoryControllerTest.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Tests\integration\Api\Chart;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\integration\TestCase;
+
+class CategoryControllerTest extends TestCase
+{
+    use RefreshDatabase;
+    private $user;
+
+    #[Override]
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        if (!isset($this->user)) {
+            $this->user = $this->createAuthenticatedUser();
+        }
+        $this->actingAs($this->user);
+    }
+
+    public function testGetOverviewChartFails(): void
+    {
+        $this->actingAs($this->user);
+        $response = $this->getJson(route('api.v1.chart.category.overview'));
+        $response->assertStatus(422);
+
+    }
+    public function testGetOverviewChart(): void
+    {
+        $this->actingAs($this->user);
+        $params = [
+            'start' => '2024-01-01',
+            'end'   => '2024-01-31',
+        ];
+        $response = $this->getJson(route('api.v1.chart.category.overview') . '?' . http_build_query($params));
+        $response->assertStatus(200);
+
+    }
+}