Regression: startColumn makes CSV parser return empty array.

[TorsteinHonsi]

Live demo with steps to reproduce

http://jsfiddle.net/hr6j17eq/2/

[TorsteinHonsi]

Related: #7265

[TorsteinHonsi]

There's still something fishy - check out this test. It concatenates column 0 with column 1. This test can replace the last test in data/csv/demo.js when fixed.

QUnit.test('startRow, endRow, startColumn, endColumn', function (assert) {
    var data =
        'Pad,Pad,Pad,Pad\n' +
        'Pad,Apples,Pears,Pad\n' +
        'Pad,1,2,Pad\n' +
        'Pad,5,6,Pad\n' +
        'Pad,Pad,Pad,Pad';

    Highcharts.data({
        csv: data,
        startRow: 1,
        endRow: 3,
        startColumn: 1,
        endColumn: 2,
        parsed: function () {

            assert.strictEqual(
                this.columns.length,
                2,
                'Two columns included'
            );
            assert.strictEqual(
                this.columns[0].join(','),
                'Apples,1,5',
                'First column ok'
            );
            assert.strictEqual(
                this.columns[0].length,
                3,
                'Three rows included'
            );
        }
    });

});

[cvasseng]

This may be related to the fix I did for the delimiter guessing, if so I have a hunch on how to fix it. WIll try to take a look today.

[cvasseng]

Shouldn't we keep the last test in data/csv/demo.js? The current last one tests string quoting (e.g. "A string with ""quotes"" in it", while the above one tests start/end row/column.