feat(core) : add jsonserializable

SplType.php

@@ -18,7 +18,9 @@
  *
  * @psalm-api
  */
-abstract class SplType
+abstract class SplType implements
+    \JsonSerializable,
+    \Stringable
 {
     use SplTypeTrait;
 

SplTypeTrait.php

@@ -26,6 +26,16 @@ trait SplTypeTrait
     // phpcs:ignore PSR2.Classes.PropertyDeclaration.Underscore
     protected $__default;
 
+    /**
+     * Specify data which should be serialized to JSON.
+     *
+     * @return mixed
+     */
+    public function jsonSerialize()
+    {
+        return $this->__default;
+    }
+
     /**
      * Serialize object.
      *

Tests/phpunit/SplBoolTest.php

@@ -68,4 +68,17 @@ public function testSerialization(): void
         $this->assertEquals($instance, $unserialized);
         $this->assertFalse($instance());
     }
+
+    /**
+     * Unit test.
+     *
+     * @return void
+     */
+    public function testJsonSerialization(): void
+    {
+        $instance = new DuckBool();
+        $json = \json_encode($instance);
+
+        $this->assertEquals("false", $json);
+    }
 }

Tests/phpunit/SplEnumTest.php

@@ -94,4 +94,17 @@ public function testSerialization(): void
         $this->assertEquals($instance, $unserialized);
         $this->assertEquals(Month::SEPTEMBER, $instance());
     }
+
+    /**
+     * Unit test.
+     *
+     * @return void
+     */
+    public function testJsonSerialization(): void
+    {
+        $instance = new Month(Month::SEPTEMBER);
+        $json = \json_encode($instance);
+
+        $this->assertEquals("9", $json);
+    }
 }

Tests/phpunit/SplFloatTest.php

@@ -64,4 +64,17 @@ public function testSerialization(): void
         $this->assertEquals($instance, $unserialized);
         $this->assertEquals(22.9, $instance());
     }
+
+    /**
+     * Unit test.
+     *
+     * @return void
+     */
+    public function testJsonSerialization(): void
+    {
+        $instance = new DuckFloat(22.9);
+        $json = \json_encode($instance);
+
+        $this->assertEquals("22.9", $json);
+    }
 }

Tests/phpunit/SplIntTest.php

@@ -64,4 +64,17 @@ public function testSerialization(): void
         $this->assertEquals($instance, $unserialized);
         $this->assertEquals(22, $instance());
     }
+
+    /**
+     * Unit test.
+     *
+     * @return void
+     */
+    public function testJsonSerialization(): void
+    {
+        $instance = new DuckInt(22);
+        $json = \json_encode($instance);
+
+        $this->assertEquals("22", $json);
+    }
 }

Tests/phpunit/SplStringTest.php

@@ -75,4 +75,17 @@ public function testSerialization(): void
         $this->assertEquals($instance, $unserialized);
         $this->assertSame('hello world', $instance());
     }
+
+    /**
+     * Unit test.
+     *
+     * @return void
+     */
+    public function testJsonSerialization(): void
+    {
+        $instance = new DuckString("hello world");
+        $json = \json_encode($instance);
+
+        $this->assertEquals('"hello world"', $json);
+    }
 }