Add badge test

tests/badge.rs

@@ -0,0 +1,18 @@
+mod util;
+
+use actix_web::client;
+
+#[actix_rt::test]
+async fn badge_succeeds() {
+    let test_app = util::spawn_app().await;
+
+    let client = client::Client::default();
+
+    let response = client
+        .get(&format!("{}/github/vbrandl/hoc", test_app.address))
+        .send()
+        .await
+        .expect("Failed to execute request");
+
+    assert!(response.status().is_success());
+}