@Test
    public void tensor_add_update_on_mixed_tensor() {
        assertTensorAddUpdate("{{x:a,y:0}:2.0, {x:a,y:1}:3.0, {x:a,y:2}:0.0}", "mixed_tensor",
                              """
                              {
                                "cells": [
                                  { "address": { "x": "a", "y": "0" }, "value": 2.0 },
                                  { "address": { "x": "a", "y": "1" }, "value": 3.0 }
                                ]
                              }""");
    }
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