Migrated a few more methods (and tests). [WIP]

README.md

@@ -5,7 +5,7 @@
 [![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE)
 [![Build Status](https://img.shields.io/travis/azuyalabs/yasumi.svg?style=flat-square)](https://travis-ci.org/azuyalabs/yasumi)
 [![StyleCI](https://styleci.io/repos/32797151/shield?branch=master)](https://styleci.io/repos/32797151)
-[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/azuyalabs/yasumi/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/azuyalabs/yasumi/?branch=master)
+[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/azuyalabs/yasumi/badges/quality-score.png?b=tainted-uranium)](https://scrutinizer-ci.com/g/azuyalabs/yasumi/?branch=tainted-uranium)
 
 Tainted Uranium
 ---------------

composer.json

@@ -43,7 +43,7 @@
     "fzaninotto/faker": "^1.9",
     "mikey179/vfsstream": "^1.6",
     "phpspec/phpspec": "^6.2",
-    "phpunit/phpunit": "^9.3"
+    "phpunit/phpunit": "^9.4"
   },
   "autoload": {
     "psr-4": {

spec/Yasumi/Provider/Netherlands/LiberationDaySpec.php

@@ -26,9 +26,10 @@ public function it_is_initializable(): void
     {
         $this->shouldHaveType(LiberationDay::class);
         $this->shouldImplement(HolidayInterface::class);
+        $this->shouldImplement(\JsonSerializable::class);
     }
 
-    public function it_should_return_holiday_key(): void
+    public function it_should_return_the_key_name(): void
     {
         $this->getKey()->shouldBe('liberationDay');
     }
@@ -42,4 +43,9 @@ public function it_should_return_correct_holiday_date(): void
     {
         $this->format('Y-m-d')->shouldBe('2020-05-05');
     }
+
+    public function it_should_return_date_string_when_called_as_string(): void
+    {
+        $this->__toString()->shouldBe('2020-05-05');
+    }
 }

src/Yasumi/BaseHoliday.php

@@ -4,12 +4,32 @@
 
 namespace Yasumi;
 
-abstract class BaseHoliday extends \DateTimeImmutable implements HolidayInterface
+abstract class BaseHoliday extends \DateTimeImmutable implements HolidayInterface, \JsonSerializable
 {
     protected const DATE_FORMAT = 'Y-m-d';
 
     public function __construct($time = 'now', $timezone = null)
     {
         parent::__construct($time, $timezone);
     }
+
+    /**
+     * Format the instance as a string using the set format.
+     *
+     * @return string this instance as a string using the set format
+     */
+     public function __toString(): string
+    {
+        return $this->format(self::DATE_FORMAT);
+    }
+
+    /**
+     * Serializes the object to a value that can be serialized natively by json_encode().
+     *
+     * @return $this
+     */
+    public function jsonSerialize(): self
+    {
+        return $this;
+    }
 }