[9.x] add test for traituserecursive, append_config in helper (#44534)

* [9.x] add test for traituserecursive, append_config in helper

* fix style

tests/Support/SupportHelpersTest.php

@@ -433,6 +433,17 @@ public function testClassUsesRecursiveReturnParentTraitsFirst()
         class_uses_recursive(SupportTestClassThree::class));
     }
 
+    public function testTraitUsesRecursive()
+    {
+        $this->assertSame([
+            'Illuminate\Tests\Support\SupportTestTraitTwo' => 'Illuminate\Tests\Support\SupportTestTraitTwo',
+            'Illuminate\Tests\Support\SupportTestTraitOne' => 'Illuminate\Tests\Support\SupportTestTraitOne',
+        ],
+            trait_uses_recursive(SupportTestClassOne::class));
+
+        $this->assertSame([], trait_uses_recursive(SupportTestClassTwo::class));
+    }
+
     public function testStr()
     {
         $stringable = str('string-value');
@@ -764,6 +775,15 @@ public function testWith()
         }));
     }
 
+    public function testAppendConfig()
+    {
+        $this->assertSame([10000 => 'name', 10001 => 'family'], append_config([1 => 'name', 2 => 'family']));
+        $this->assertSame([10000 => 'name', 10001 => 'family'], append_config(['name', 'family']));
+
+        $array = ['name' => 'Taylor', 'family' => 'Otwell'];
+        $this->assertSame($array, append_config($array));
+    }
+
     public function testEnv()
     {
         $_SERVER['foo'] = 'bar';