Add Slovakia test

tests/.pest/snapshots/Countries/SlovakiaTest/it_can_calculate_slovak_holidays.snap

@@ -0,0 +1,66 @@
+[
+    {
+        "name": "De\u0148 vzniku Slovenskej republiky",
+        "date": "2024-01-01"
+    },
+    {
+        "name": "Zjavenie P\u00e1na (Traja kr\u00e1li)",
+        "date": "2024-01-06"
+    },
+    {
+        "name": "Ve\u013ek\u00fd piatok",
+        "date": "2024-03-29"
+    },
+    {
+        "name": "Ve\u013ekono\u010dn\u00fd pondelok",
+        "date": "2024-04-01"
+    },
+    {
+        "name": "Sviatok pr\u00e1ce",
+        "date": "2024-05-01"
+    },
+    {
+        "name": "De\u0148 v\u00ed\u0165azstva nad fa\u0161izmom",
+        "date": "2024-05-08"
+    },
+    {
+        "name": "Sviatok sv\u00e4t\u00e9ho Cyrila a Metoda",
+        "date": "2024-07-05"
+    },
+    {
+        "name": "V\u00fdro\u010die V\u00fdro\u010die Slovensk\u00e9ho n\u00e1rodn\u00e9ho povstania",
+        "date": "2024-08-29"
+    },
+    {
+        "name": "De\u0148 \u00dastavy Slovenskej republiky",
+        "date": "2024-09-01"
+    },
+    {
+        "name": "Sedembolestn\u00e1 Panna M\u00e1ria",
+        "date": "2024-09-15"
+    },
+    {
+        "name": "De\u0148 vzniku samostatn\u00e9ho \u010desko-slovensk\u00e9ho \u0161t\u00e1tu",
+        "date": "2024-10-28"
+    },
+    {
+        "name": "Sviatok v\u0161etk\u00fdch sv\u00e4t\u00fdch",
+        "date": "2024-11-01"
+    },
+    {
+        "name": "De\u0148 boja za slobodu a demokraciu",
+        "date": "2024-11-17"
+    },
+    {
+        "name": "\u0160tedr\u00fd de\u0148",
+        "date": "2024-12-24"
+    },
+    {
+        "name": "Prv\u00fd sviatok viano\u010dn\u00fd",
+        "date": "2024-12-25"
+    },
+    {
+        "name": "Druh\u00fd sviatok viano\u010dn\u00fd",
+        "date": "2024-12-26"
+    }
+]

tests/Countries/SlovakiaTest.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Spatie\Holidays\Tests\Countries;
+
+use Carbon\CarbonImmutable;
+use Spatie\Holidays\Holidays;
+
+it('can calculate slovak holidays', function () {
+    CarbonImmutable::setTestNowAndTimezone('2024-01-01');
+
+    $holidays = Holidays::for(country: 'sk')->get();
+
+    expect($holidays)
+        ->toBeArray()
+        ->not()->toBeEmpty();
+
+    expect(formatDates($holidays))->toMatchSnapshot();
+});