Refactor the integration test suite

tests/api/health_check.rs

@@ -0,0 +1,15 @@
+use crate::helpers::app_address;
+use rstest::*;
+
+#[rstest]
+#[tokio::test]
+async fn health_check_works(app_address: &str) {
+    let response = reqwest::Client::new()
+        .get(&format!("{}/ping", &app_address))
+        .send()
+        .await
+        .expect("Failed to execute request.");
+
+    assert!(response.status().is_success());
+    assert_eq!(Some(0), response.content_length());
+}