fix unexpected lowecasing of appends (#637)

Co-authored-by: Demos Petsas <[email protected]>

Author: demoskp

src/QueryBuilderRequest.php

@@ -54,7 +54,7 @@ public function appends(): Collection
         $appendParts = $this->getRequestData($appendParameterName);
 
         if (! is_array($appendParts)) {
-            $appendParts = explode(static::getAppendsArrayValueDelimiter(), strtolower($appendParts));
+            $appendParts = explode(static::getAppendsArrayValueDelimiter(), $appendParts);
         }
 
         return collect($appendParts)->filter();

tests/QueryBuilderRequestTest.php

@@ -454,4 +454,16 @@ public function it_takes_custom_delimiters_for_splitting_request_parameters()
 
         $this->assertEquals($expected, $request->filters()->toArray());
     }
+
+    /** @test */
+    public function it_adds_any_appends_as_they_come_from_the_request()
+    {
+        $request = new QueryBuilderRequest([
+            'append' => 'aCamelCaseAppend,anotherappend',
+        ]);
+
+        $expected = collect(['aCamelCaseAppend', 'anotherappend']);
+
+        $this->assertEquals($expected, $request->appends());
+    }
 }