test: authorization test for guest users

tests/e2e/web/api/v1/contexts/proxy/contract.rs

@@ -1,3 +1,41 @@
 //! API contract for `proxy` context.
 
-// todo
+mod authorization {
+    use torrust_index::web::api;
+
+    use crate::common::client::Client;
+    use crate::common::contexts::torrent::fixtures::random_torrent;
+    use crate::e2e::environment::TestEnv;
+    use crate::e2e::web::api::v1::contexts::torrent::steps::upload_torrent;
+    use crate::e2e::web::api::v1::contexts::user::steps::new_logged_in_user;
+
+    #[tokio::test]
+    async fn it_should_return_an_ok_response_when_a_guest_user_tries_to_get_a_proxied_image_by_url() {
+        let mut env = TestEnv::new();
+
+        env.start(api::Version::V1).await;
+
+        if !env.provides_a_tracker() {
+            println!("test skipped. It requires a tracker to be running.");
+            return;
+        }
+
+        let mut test_torrent = random_torrent();
+
+        test_torrent.index_info.description = String::from(
+            "![image info](https://upload.wikimedia.org/wikipedia/commons/thumb/7/71/Zaadpluizen_van_een_Clematis_texensis_%27Princess_Diana%27._18-07-2023_%28actm.%29_02.jpg/1024px-Zaadpluizen_van_een_Clematis_texensis_%27Princess_Diana%27._18-07-2023_%28actm.%29_02.jpg)",
+        );
+
+        let torrent_uploader = new_logged_in_user(&env).await;
+
+        upload_torrent(&torrent_uploader, &test_torrent.index_info, &env).await;
+
+        let client = Client::unauthenticated(&env.server_socket_addr().unwrap());
+
+        let url = "https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2F7%2F71%2FZaadpluizen_van_een_Clematis_texensis_%2527Princess_Diana%2527._18-07-2023_%2528actm.%2529_02.jpg%2F1024px-Zaadpluizen_van_een_Clematis_texensis_%2527Princess_Diana%2527._18-07-2023_%2528actm.%2529_02.jpg";
+
+        let response = client.get_image_by_url(url).await;
+
+        assert_eq!(response.status, 200);
+    }
+}