public void TestMultipleColumns2()
{
var dm = DataMap.FromDictionary(new OrderedDictionary()
{
{ "cat1", new int[] { 1, 2, 1, 1, 3 } },
{ "cat2", new string[] { "a", "b", "c", "a", "a" } },
{ "value1", new int[] { 1, 2, 3, 4, 5 } }
});
var g = new GroupBy(dm, new string[] { "cat1", "cat2" });
var groups = g.Groups().ToArray();
Assert.Equal(4, groups.Length);
Assert.Equal(new[] { "cat1", "cat2", "value1" }, groups[0].ColumnNames);
Assert.Equal(new[] { 1, 1 }, groups[0]["cat1"].Values);
Assert.Equal(new[] { "a", "a" }, groups[0]["cat2"].Values);
Assert.Equal(new[] { 1, 4 }, groups[0]["value1"].Values);
Assert.Equal(new[] { "cat1", "cat2", "value1" }, groups[3].ColumnNames);
Assert.Equal(new[] { 3 }, groups[3]["cat1"].Values);
Assert.Equal(new[] { "a" }, groups[3]["cat2"].Values);
Assert.Equal(new[] { 5 }, groups[3]["value1"].Values);
}