public void Question_4_1_InvalidCases()
{
var tree = new GraphNode <int>(0, null);
TestHelpers.AssertExceptionThrown(() => { Question_4_1.AreConnectedBFS(null, tree); }, typeof(ArgumentNullException));
TestHelpers.AssertExceptionThrown(() => { Question_4_1.AreConnectedBFS(tree, null); }, typeof(ArgumentNullException));
}
private void Validate <T>(GraphNode <T> node1, GraphNode <T> node2, bool expected, bool expectedBiDirectional)
where T : IEquatable <T>
{
var result = Question_4_1.AreConnectedBFS(node1, node2);
Assert.AreEqual(expected, result, "Result did not equal expected.");
result = Question_4_1.AreConnectedBiDirectionalBFS(node1, node2);
Assert.AreEqual(expectedBiDirectional, result, "BiDirectional result was not expected.");
}