public void BinaryTree_LongestPath_Should_Pass()
{
var root = this.CreateTestTree();
var t = new BinaryTree <int>(root);
var result = t.GetLongestPath();
result.Should().NotBeNull("result should not be null.");
result.Count.Should().Be(4, "Incorrect number of items in the longest path.");
List <int> expected = new List <int> {
1, 2, 5, 7
};
for (int i = 0; i < 4; i++)
{
result[i].Should().Be(expected[i], "Incorrect result at position {0}", i);
}
}