Add support for json_encode

src/Enum.php

@@ -15,7 +15,7 @@
  * @author Daniel Costa <[email protected]>
  * @author Mirosław Filip <[email protected]>
  */
-abstract class Enum
+abstract class Enum implements \JsonSerializable
 {
     /**
      * Enum value
@@ -183,4 +183,14 @@ public static function __callStatic($name, $arguments)
 
         throw new \BadMethodCallException("No static method or enum constant '$name' in class " . get_called_class());
     }
+
+    /**
+     * Return the value when serialized with json_encode
+     *
+     * @return mixed
+     */
+    public function jsonSerialize()
+    {
+        return $this->value;
+    }
 }

tests/EnumTest.php

@@ -247,4 +247,21 @@ public function testEqualsConflictValues()
     {
         $this->assertFalse(EnumFixture::FOO()->equals(EnumConflict::FOO()));
     }
+
+    /**
+     * json_encode normally returns the Enum object itself,
+     * but it should return the value of the enum instead
+     */
+    public function testJsonEncode()
+    {
+        $foo = new EnumFixture(EnumFixture::FOO);
+
+        $object = (object)[
+            'myFoo' => $foo
+        ];
+
+        $json = json_encode($object);
+
+        $this->assertEquals($json, '{"myFoo":"foo"}');
+    }
 }