Checked json data.

src/main.rs

@@ -284,4 +284,25 @@ mod servers {
             "do not allow post to existing documents"
         );
     }
+
+    #[tokio::test]
+    async fn post_with_missing_document() {
+        let app = create_app(MoreThanText::new()).await;
+        let response = app
+            .clone()
+            .oneshot(
+                Request::builder()
+                    .method(Method::POST)
+                    .uri("/api/something")
+                    .body("{}".to_string())
+                    .unwrap(),
+            )
+            .await
+            .unwrap();
+        assert_eq!(
+            response.status(),
+            StatusCode::BAD_REQUEST,
+            "do not allow post to existing documents"
+        );
+    }
 }