test: 💍 add tests

tests/Model/ApiResourceTest.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ttskch\JpPostalCodeApi\Model;
+
+use PHPUnit\Framework\TestCase;
+
+class ApiResourceTest extends TestCase
+{
+    private ApiResource $SUT;
+
+    protected function setUp(): void
+    {
+        $this->SUT = new ApiResource('0640941', [
+            new Address(
+                '01',
+                ja: new AddressUnit('北海道', '札幌市中央区', '旭ケ丘'),
+                en: new AddressUnit('Hokkaido', 'Chuo-ku, Sapporo-shi', 'Asahigaoka'),
+            ),
+        ]);
+    }
+
+    public function testJsonSerialize(): void
+    {
+        $json = json_encode($this->SUT, flags: JSON_THROW_ON_ERROR);
+        $expected = <<<JSON
+{"postalCode":"0640941","addresses":[{"prefectureCode":"01","ja":{"prefecture":"\u5317\u6d77\u9053","address1":"\u672d\u5e4c\u5e02\u4e2d\u592e\u533a","address2":"\u65ed\u30b1\u4e18","address3":"","address4":""},"en":{"prefecture":"Hokkaido","address1":"Chuo-ku, Sapporo-shi","address2":"Asahigaoka","address3":"","address4":""}}]}
+JSON;
+        self:self::assertSame($expected, $json);
+    }
+
+    public function testFromJson(): void
+    {
+        $json = <<<JSON
+{"postalCode":"0640941","addresses":[{"prefectureCode":"01","ja":{"prefecture":"\u5317\u6d77\u9053","address1":"\u672d\u5e4c\u5e02\u4e2d\u592e\u533a","address2":"\u65ed\u30b1\u4e18","address3":"","address4":""},"en":{"prefecture":"Hokkaido","address1":"Chuo-ku, Sapporo-shi","address2":"Asahigaoka","address3":"","address4":""}}]}
+JSON;
+        $actual = ApiResource::fromJson($json);
+        self::assertEquals($this->SUT, $actual);
+    }
+}