Split the test

It was not testing both cases, but only one

Issue: ARSN-448

tests/unit/s3routes/routeDELETE.spec.js

@@ -91,7 +91,7 @@ describe('routeDELETE', () => {
         );
     });
 
-    it('should return 204 when objectDelete encounters NoSuchKey or NoSuchVersion errors', () => {
+    it('should return 204 when objectDelete encounters NoSuchKey errors', () => {
         request.objectKey = 'objectKey';
         request.query = {};
 
@@ -107,6 +107,22 @@ describe('routeDELETE', () => {
         );
     });
 
+    it('should return 204 when objectDelete encounters NoSuchVersion errors', () => {
+        request.objectKey = 'objectKey';
+        request.query = {};
+
+        const noSuchVersionError = new ArsenalError('NoSuchVersion');
+        api.callApiMethod = jest.fn((method, req, res, log, callback) => {
+            callback(noSuchVersionError, {});
+        });
+
+        routeDELETE(request, response, api, log, statsClient);
+
+        expect(routesUtils.responseNoBody).toHaveBeenCalledWith(
+            null, {}, response, 204, log,
+        );
+    });
+
     it('should return error code when objectDelete encounters non-arsenal errors', () => {
         request.objectKey = 'objectKey';
         request.query = {};