[visualization-api] DataTable "Cannot read properties of undefined" error loading json array in JS

[maxdatabook]

I took this json DataTable example from Google documentation and save to 
json DataTest

var jsonDataTest = {
  cols: [{id: 'A', label: 'NEW A', type: 'string'},
         {id: 'B', label: 'B-label', type: 'number'},
         {id: 'C', label: 'C-label', type: 'date'}
  ],
  rows: [{c:[{v: 'a'},
             {v: 1.0, f: 'One'},
             {v: new Date(2008, 1, 28, 0, 31, 26), f: '2/28/08 12:31 AM'}
        ]},
         {c:[{v: 'b'},
             {v: 2.0, f: 'Two'},
             {v: new Date(2008, 2, 30, 0, 31, 26), f: '3/30/08 12:31 AM'}
        ]},
         {c:[{v: 'c'},
             {v: 3.0, f: 'Three'},
             {v: new Date(2008, 3, 30, 0, 31, 26), f: '4/30/08 12:31 AM'}
        ]}
  ]
}

But I get an error when I do this:

var data = new google.visualization.DataTable(jsonDataTest);

how do I fix it.  I've tried variation of this tip I've read elsewhere but 
doesn't work. jsonData = JSON.stringify(eval("(" + jsonDataTest + ")"));

Thanks!

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