fix: reset $unsharedHeaders after sending request

If user setHeader() that is defined in $unsharedHeaders, the header will be removed
before sending request, and there is no way to send the header.

The reason I didn't do the reset after sending is because a test failed.
This time I modify the test, too.

Author: kenjis

system/HTTP/CURLRequest.php

@@ -116,11 +116,6 @@ public function __construct(App $config, URI $uri, ?ResponseInterface $response
      */
     public function request($method, string $url, array $options = []): ResponseInterface
     {
-        // Reset unshared headers
-        foreach ($this->unsharedHeaders as $header) {
-            $this->removeHeader($header);
-        }
-
         $this->parseOptions($options);
 
         $url = $this->prepareURL($url);
@@ -129,6 +124,10 @@ public function request($method, string $url, array $options = []): ResponseInte
 
         $this->send($method, $url);
 
+        // Reset unshared headers
+        foreach ($this->unsharedHeaders as $header) {
+            $this->removeHeader($header);
+        }
         // Reset unshared configs
         unset($this->config['multipart'], $this->config['form_params']);
 

tests/system/HTTP/CURLRequestTest.php

@@ -912,7 +912,10 @@ public function testSetJSON()
         $this->request->setJSON($params)->post('/post');
 
         $this->assertSame(json_encode($params), $this->request->getBody());
-        $this->assertSame('application/json', $this->request->getHeaderLine('Content-Type'));
+        $this->assertSame(
+            'Content-Type: application/json',
+            $this->request->curl_options[CURLOPT_HTTPHEADER][0]
+        );
     }
 
     public function testHTTPv1()