Hokkaido suffix issue

Author: tanigami

src/Geo/Japan/Prefecture.php

@@ -188,7 +188,7 @@ public static function __callStatic(string $name, array $arguments): self
     public static function ofKanjiName(string $kanjiName): self
     {
         $filteredData = array_filter(self::DATA, function (array $prefecture) use ($kanjiName) {
-            return $kanjiName === strtolower($prefecture['kanjiName']);
+            return $kanjiName === $prefecture['kanjiName'];
         });
         if ([] === $filteredData) {
             throw new InvalidArgumentException(sprintf('There is no prefecture of kanji name: %s', $kanjiName));
@@ -214,6 +214,9 @@ public static function ofSuffixedKanjiName(string $suffixedKanjiName): self
     {
         $filteredData = array_filter(self::DATA, function (array $prefecture) use ($suffixedKanjiName) {
             $suffixFactoryMethod = $prefecture['suffix'];
+            if ($suffixedKanjiName === '北海道') {
+                return $suffixedKanjiName === $prefecture['kanjiName'];
+            }
 
             return $suffixedKanjiName === $prefecture['kanjiName'] . PrefectureSuffix::$suffixFactoryMethod()->kanjiName();
         });

tests/Geo/Japan/PrefectureTest.php

@@ -272,6 +272,11 @@ public function testCreationFromInvalidKanjiName()
 
     public function testCreationFromSuffixedKanjiName()
     {
+        $this->assertSame('JP-01', Prefecture::ofSuffixedKanjiName('北海道')->isoCode());
+        $this->assertSame('Hokkaido', Prefecture::ofSuffixedKanjiName('北海道')->suffixedName());
+        $this->assertSame('北海道', Prefecture::ofSuffixedKanjiName('北海道')->suffixedKanjiName());
+        $this->assertTrue(Prefecture::ofSuffixedKanjiName('北海道')->region()->equals(Region::hokkaido()));
+
         $this->assertSame('JP-47', Prefecture::ofSuffixedKanjiName('沖縄県')->isoCode());
         $this->assertSame('Okinawa-ken', Prefecture::ofSuffixedKanjiName('沖縄県')->suffixedName());
         $this->assertSame('沖縄県', Prefecture::ofSuffixedKanjiName('沖縄県')->suffixedKanjiName());