@Test
    public void testAssignUpdateOfNullTensor() {
        ClearValueUpdate clearUpdate = (ClearValueUpdate) getTensorField(createAssignUpdateWithSparseTensor(null)).getValueUpdate(0);
        assertNotNull(clearUpdate);
        assertNull(clearUpdate.getValue());
    }
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