Fix swapIndexes flaky tests

test/swaps_test.dart

@@ -9,21 +9,28 @@ void main() {
     setUpClient();
 
     test('swaps indexes from input', () async {
-      var books = ['books', 'books_new'];
-      var movies = ['movies', 'movies_new'];
+      var books = [randomUid('books'), randomUid('books_new')];
+      var movies = [randomUid('movies'), randomUid('movies_new')];
       var swaps = [SwapIndex(books), SwapIndex(movies)];
 
+      // first create the indexes to be swapped
+      for (var index in books + movies) {
+        await client.createIndex(index).waitFor(client: client);
+      }
+
       var response = await client
           .swapIndexes(
             swaps,
             deleteWhenDone: false,
           )
           .waitFor(
             client: client,
-            throwFailed: false,
+            throwFailed: true,
           );
 
       expect(response.type, 'indexSwap');
+      expect(response.error, null);
+      expect(response.status, 'succeeded');
       expect(response.details!['swaps'], [
         {'indexes': books},
         {'indexes': movies}