@Test
    public void tensor_modify_update_with_add_operation_mixed() {
        assertTensorModifyUpdate("{{x:a,y:0}:2.0}", TensorModifyUpdate.Operation.ADD, "mixed_tensor",
                                 """
                                 {
                                   "operation": "add",
                                   "cells": [
                                     { "address": { "x": "a", "y": "0" }, "value": 2.0 }
                                   ]
                                 }""");
    }
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