Add toJson() method to Collection

Author: cdtweb

src/Collection.php

@@ -212,6 +212,16 @@ public function toArray(): array
         return $this->items;
     }
 
+    /**
+     * Get collection as JSON.
+     *
+     * @return string
+     */
+    public function toJson(): string
+    {
+        return json_encode($this);
+    }
+
     /**
      * Flatten collection with dot (.) separator.
      *

tests/CollectionTest.php

@@ -124,6 +124,18 @@ public function testToArray($key, $value)
         $this->assertEquals($values, array_values($arr));
     }
 
+    /**
+     * @covers Collection::toJson
+     * @dataProvider collectionItemsProvider
+     */
+    public function testToJson($key, $value)
+    {
+        $this->collection->set($key, $value);
+        $json = json_encode($this->collection);
+
+        $this->assertEquals($json, $this->collection->toJson());
+    }
+
     /**
      * @covers Collection::is
      * @dataProvider isCollectionItemsProvider