add test for labor day of korea.

Signed-off-by: barami <barams@gmail.com>

Author: barami

tests/SouthKorea/LabourDayTest.php

@@ -0,0 +1,121 @@
+<?php
+
+declare(strict_types = 1);
+
+/**
+ * This file is part of the 'Yasumi' package.
+ *
+ * The easy PHP Library for calculating holidays.
+ *
+ * Copyright (c) 2015 - 2026 AzuyaLabs
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @author Sacha Telgenhof <me at sachatelgenhof dot com>
+ */
+
+use Yasumi\Holiday;
+use Yasumi\Provider\DateTimeZoneFactory;
+use Yasumi\tests\HolidayTestCase;
+use Yasumi\tests\SouthKorea\SouthKoreaBaseTestCase;
+
+/**
+ * Class for testing Labour Day in South Korea.
+ */
+class LabourDayTest extends SouthKoreaBaseTestCase implements HolidayTestCase
+{
+    /**
+     * The name of the holiday.
+     */
+    public const HOLIDAY = 'labourDay';
+
+    /**
+     * The year in which the holiday was first established.
+     */
+    public const ESTABLISHMENT_YEAR = 2026;
+
+    /**
+     * Tests the holiday defined in this test.
+     *
+     * @throws Exception
+     */
+    public function testLabourDay(): void
+    {
+        // From 2026 onwards.
+        $year = static::generateRandomYear(self::ESTABLISHMENT_YEAR);
+        $this->assertHoliday(
+            self::REGION,
+            self::HOLIDAY,
+            $year,
+            new DateTime("{$year}-5-1", DateTimeZoneFactory::getDateTimeZone(self::TIMEZONE))
+        );
+
+        // Before 2026
+        $this->assertNotHoliday(
+            self::REGION,
+            self::HOLIDAY,
+            static::generateRandomYear(null, self::ESTABLISHMENT_YEAR - 1),
+        );
+    }
+
+    /**
+     * Tests the substitute holiday defined in this test.
+     *
+     * @throws Exception
+     */
+    #[PHPUnit\Framework\Attributes\DataProvider('SubstituteHolidayDataProvider')]
+    public function testSubstituteHoliday(int $year, string $expected): void
+    {
+        $this->assertSubstituteHoliday(
+            self::REGION,
+            self::HOLIDAY,
+            $year,
+            new DateTime($expected, DateTimeZoneFactory::getDateTimeZone(self::TIMEZONE))
+        );
+    }
+
+    /**
+     * Tests translated name of the holiday defined in this test.
+     *
+     * @throws Exception
+     */
+    public function testTranslation(): void
+    {
+        $this->assertTranslatedHolidayName(
+            self::REGION,
+            self::HOLIDAY,
+            static::generateRandomYear(self::ESTABLISHMENT_YEAR),
+            [self::LOCALE => '노동절']
+        );
+    }
+
+    /**
+     * Tests type of the holiday defined in this test.
+     *
+     * @throws Exception
+     */
+    public function testHolidayType(): void
+    {
+        $this->assertHolidayType(
+            self::REGION,
+            self::HOLIDAY,
+            static::generateRandomYear(self::ESTABLISHMENT_YEAR),
+            Holiday::TYPE_OFFICIAL
+        );
+    }
+
+    public static function SubstituteHolidayDataProvider(): array
+    {
+        return [
+            [2027, '2027-05-03'],
+            [2032, '2032-05-03'],
+            [2033, '2033-05-02'],
+            [2038, '2038-05-03'],
+            [2038, '2038-05-03'],
+            [2039, '2039-05-03'],
+            [2044, '2044-05-02'],
+            [2049, '2049-05-03'],
+        ];
+    }
+}