test: add testSendProxied

Author: jozefrebjak

tests/system/HTTP/CURLRequestTest.php

@@ -718,6 +718,18 @@ public function testSendContinued()
         $this->assertSame('Hi there', $response->getBody());
     }
 
+    public function testSendProxied()
+    {
+        $request = $this->getRequest([
+            'base_uri' => 'http://www.foo.com/api/v1/',
+            'delay'    => 100,
+        ]);
+
+        $request->setOutput("HTTP/1.1 200 Connection established:\x0d\x0a\x0d\x0aHi there");
+        $response = $request->get('answer');
+        $this->assertSame('Hi there', $response->getBody());
+    }
+
     /**
      * See: https://github.com/codeigniter4/CodeIgniter4/issues/3261
      */