Handle bad json.

src/main.rs

@@ -106,7 +106,9 @@ async fn mtt_conn(
     let status = match reply.get_error() {
         Some(err) => match err {
             ErrorType::DocumentAlreadyExists => StatusCode::CONFLICT,
+            ErrorType::DocumentInvalidRequest => StatusCode::BAD_REQUEST,
             ErrorType::DocumentNotFound => StatusCode::NOT_FOUND,
+            // _ => StatusCode::INTERNAL_SERVER_ERROR,
         },
         None => StatusCode::OK,
     };
@@ -261,4 +263,25 @@ mod servers {
             "do not allow post to existing documents"
         );
     }
+
+    #[tokio::test]
+    async fn invalid_json() {
+        let app = create_app(MoreThanText::new()).await;
+        let response = app
+            .clone()
+            .oneshot(
+                Request::builder()
+                    .method(Method::POST)
+                    .uri("/api/something")
+                    .body("Some invalid json.".to_string())
+                    .unwrap(),
+            )
+            .await
+            .unwrap();
+        assert_eq!(
+            response.status(),
+            StatusCode::BAD_REQUEST,
+            "do not allow post to existing documents"
+        );
+    }
 }