private DocumentPut createPutWithoutTensor() {
        JsonReader reader = createReader(inputJson("[ { 'put': '" + TENSOR_DOC_ID + "', 'fields': { } } ]"));
        return (DocumentPut) reader.next();
    }
Tests parsing of various tensor values set at the root, i.e. no 'cells', 'blocks' or 'values'
document/src/test/java/com/yahoo/document/json/JsonReaderTestCase.java