1. update test case.

2. optimize code.

src/Models/SystemSetting.php

@@ -42,11 +42,7 @@ public function __construct(array $attributes = [])
      */
     public function getValueAttribute($value)
     {
-        if (!is_null($value)) {
-            return json_decode($value, true);
-        }
-
-        return '';
+        return json_decode($value, true);
     }
 
     /**

src/ServiceProvider.php

@@ -72,12 +72,4 @@ protected function registerMigrations()
     {
         return $this->loadMigrationsFrom(__DIR__.'/../migrations');
     }
-
-    /**
-     * @return array
-     */
-    public function provides()
-    {
-        return [SettingInterface::class, 'system_setting'];
-    }
 }

tests/SettingTest.php

@@ -9,6 +9,8 @@
  * file that was distributed with this source code.
  */
 
+use iBrand\Component\Setting\Repositories\SettingInterface;
+
 /**
  * Created by PhpStorm.
  * User: Administrator
@@ -85,7 +87,15 @@ public function testGet()
         $setting4 = settings(['key4' => false]);
         $this->assertFalse(settings('key4'));
 
+    }
+
+    public function testHelpers()
+    {
+        $result = settings();
+        $this->assertInstanceOf(SettingInterface::class,$result);
 
+        $result = settings(app(SettingInterface::class));
+        $this->assertEquals('',$result);
     }
 
 }