public void IssueHierarchy()
{
Assert.AreEqual(5, _report.Issue.Count());
Assert.AreEqual(2, _report.AtLevel(0).Count());
Assert.AreEqual(1, _report.AtLevel(1).Count());
Assert.AreEqual(2, _report.AtLevel(2).Count());
CollectionAssert.AreEquivalent(new int[] { 0, 1, 2, 2, 0 }, _report.Issue.Select(i => i.GetHierarchyLevel()).ToArray());
}