Implement holidays for Austria

src/Countries/Austria.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace Spatie\Holidays\Countries;
+
+use Carbon\CarbonImmutable;
+
+class Austria extends Country
+{
+    public function countryCode(): string
+    {
+        return 'at';
+    }
+
+    /** @return array<string, CarbonImmutable> */
+    protected function allHolidays(int $year): array
+    {
+        return array_merge([
+            'Neujahr' => '01-01',
+            'Heilige Drei Könige' => '01-06',
+            'Staatsfeiertag' => '05-01',
+            'Mariä Himmelfahrt' => '08-15',
+            'Nationalfeiertag' => '10-26',
+            'Allerheiligen' => '11-01',
+            'Mariä Empfängnis' => '12-08',
+            'Christtag' => '12-25',
+            'Stefanitag' => '12-25',
+        ], $this->variableHolidays($year));
+    }
+
+    /** @return array<string, CarbonImmutable> */
+    protected function variableHolidays(int $year): array
+    {
+        $easter = CarbonImmutable::createFromTimestamp(easter_date($year))
+            ->setTimezone('Europe/Vienna');
+
+        return [
+            'Ostermontag' => $easter->addDay(1),
+            'Christi Himmelfahrt' => $easter->addDays(39),
+            'Pfingstmontag' => $easter->addDays(50),
+            'Fronleichnam' => $easter->addDays(60),
+        ];
+    }
+}

tests/.pest/snapshots/Countries/AustriaTest/it_can_calculate_austrian_holidays.snap

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+[
+    {
+        "name": "Neujahr",
+        "date": "2024-01-01"
+    },
+    {
+        "name": "Heilige Drei K\u00f6nige",
+        "date": "2024-01-06"
+    },
+    {
+        "name": "Ostermontag",
+        "date": "2024-04-01"
+    },
+    {
+        "name": "Staatsfeiertag",
+        "date": "2024-05-01"
+    },
+    {
+        "name": "Christi Himmelfahrt",
+        "date": "2024-05-09"
+    },
+    {
+        "name": "Pfingstmontag",
+        "date": "2024-05-20"
+    },
+    {
+        "name": "Fronleichnam",
+        "date": "2024-05-30"
+    },
+    {
+        "name": "Mari\u00e4 Himmelfahrt",
+        "date": "2024-08-15"
+    },
+    {
+        "name": "Nationalfeiertag",
+        "date": "2024-10-26"
+    },
+    {
+        "name": "Allerheiligen",
+        "date": "2024-11-01"
+    },
+    {
+        "name": "Mari\u00e4 Empf\u00e4ngnis",
+        "date": "2024-12-08"
+    },
+    {
+        "name": "Christtag",
+        "date": "2024-12-25"
+    },
+    {
+        "name": "Stefanitag",
+        "date": "2024-12-25"
+    }
+]

tests/Countries/AustriaTest.php

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