[GraphQL] Fix hasNextPage when offset > itemsPerPage (#3281)

Author: alanpoulain

src/GraphQl/Resolver/Stage/SerializeStage.php

@@ -150,7 +150,8 @@ private function serializePaginatedCollection(iterable $collection, array $norma
             $data['pageInfo']['startCursor'] = base64_encode((string) $offset);
             $end = $offset + $nbPageItems - 1;
             $data['pageInfo']['endCursor'] = base64_encode((string) ($end >= 0 ? $end : 0));
-            $data['pageInfo']['hasNextPage'] = (float) $offset + $collection->getItemsPerPage() * $collection->getCurrentPage() < $totalItems;
+            $itemsPerPage = $collection->getItemsPerPage();
+            $data['pageInfo']['hasNextPage'] = (float) ($itemsPerPage > 0 ? $offset % $itemsPerPage : $offset) + $itemsPerPage * $collection->getCurrentPage() < $totalItems;
             $data['pageInfo']['hasPreviousPage'] = $offset > 0;
         }
 

tests/GraphQl/Resolver/Stage/SerializeStageTest.php

@@ -145,7 +145,7 @@ public function applyCollectionWithPaginationProvider(): array
             'paginator' => [new ArrayPaginator([new \stdClass(), new \stdClass(), new \stdClass()], 0, 2), [], ['totalCount' => 3., 'edges' => [['node' => ['normalized_item'], 'cursor' => 'MA=='], ['node' => ['normalized_item'], 'cursor' => 'MQ==']], 'pageInfo' => ['startCursor' => 'MA==', 'endCursor' => 'MQ==', 'hasNextPage' => true, 'hasPreviousPage' => false]]],
             'paginator with after cursor' => [new ArrayPaginator([new \stdClass(), new \stdClass(), new \stdClass()], 1, 2), ['after' => 'MA=='], ['totalCount' => 3., 'edges' => [['node' => ['normalized_item'], 'cursor' => 'MQ=='], ['node' => ['normalized_item'], 'cursor' => 'Mg==']], 'pageInfo' => ['startCursor' => 'MQ==', 'endCursor' => 'Mg==', 'hasNextPage' => false, 'hasPreviousPage' => true]]],
             'paginator with bad after cursor' => [new ArrayPaginator([], 0, 0), ['after' => '-'], null, Error::class, 'Cursor - is invalid'],
-            'paginator with before cursor' => [new ArrayPaginator([new \stdClass(), new \stdClass(), new \stdClass()], 1, 1), ['before' => 'Mg=='], ['totalCount' => 3., 'edges' => [['node' => ['normalized_item'], 'cursor' => 'MQ==']], 'pageInfo' => ['startCursor' => 'MQ==', 'endCursor' => 'MQ==', 'hasNextPage' => false, 'hasPreviousPage' => true]]],
+            'paginator with before cursor' => [new ArrayPaginator([new \stdClass(), new \stdClass(), new \stdClass()], 1, 1), ['before' => 'Mg=='], ['totalCount' => 3., 'edges' => [['node' => ['normalized_item'], 'cursor' => 'MQ==']], 'pageInfo' => ['startCursor' => 'MQ==', 'endCursor' => 'MQ==', 'hasNextPage' => true, 'hasPreviousPage' => true]]],
             'paginator with bad before cursor' => [new ArrayPaginator([], 0, 0), ['before' => '-'], null, Error::class, 'Cursor - is invalid'],
             'paginator with last' => [new ArrayPaginator([new \stdClass(), new \stdClass(), new \stdClass()], 1, 2), ['last' => 2], ['totalCount' => 3., 'edges' => [['node' => ['normalized_item'], 'cursor' => 'MQ=='], ['node' => ['normalized_item'], 'cursor' => 'Mg==']], 'pageInfo' => ['startCursor' => 'MQ==', 'endCursor' => 'Mg==', 'hasNextPage' => false, 'hasPreviousPage' => true]]],
         ];