public void IsEdge_Throws_When_NullPassed_In_For_Source_Node()
{
var net = new BasicAdjList(Guid.NewGuid());
INode nodeA = null;
INode nodeB = net.CreateNode();
var ex = Assert.Throws<ArgumentNullException>(() => net.IsEdge(nodeA, nodeB));
}
public void IsEdge_Throws_When_Invalid_Type_Passed_In_For_Dest_Node()
{
var net = new BasicAdjList(Guid.NewGuid());
INode nodeA = net.CreateNode();
INode nodeB = new DummyBasicNode();
var ex = Assert.Throws<ArgumentException>(() => net.IsEdge(nodeA, nodeB));
}
public void IsEdge_ReturnsTrueIfEdgeExistsBetweenTwoNodes()
{
//Arrange
var net = new BasicAdjList(Guid.NewGuid());
INode nodeA = net.CreateNode();
INode nodeB = net.CreateNode();
IEdge edge = net.CreateEdge(nodeA, nodeB);
bool result = net.IsEdge(nodeA, nodeB);
Assert.True(result);
}
public void IsEdge_ReturnsTrueFor_Self_Looped_Edges()
{
//Arrange
var net = new BasicAdjList(Guid.NewGuid());
INode nodeA = net.CreateNode();
INode nodeB = net.CreateNode();
IEdge edge = net.CreateEdge(nodeB, nodeB);
bool result = net.IsEdge(nodeB, nodeB);
Assert.True(result);
}
public void IsEdge_ReturnsFalseIf_Nodes_AreReversedButEdgeExists()
{
//Arrange
var net = new BasicAdjList(Guid.NewGuid());
INode nodeA = net.CreateNode();
INode nodeB = net.CreateNode();
IEdge edge = net.CreateEdge(nodeA, nodeB);
bool result = net.IsEdge(nodeB, nodeA);
Assert.False(result);
}
public void IsEdge_ReturnsFalseIfEdgeDNE()
{
//Arrange
var net = new BasicAdjList(Guid.NewGuid());
INode nodeA = net.CreateNode();
INode nodeB = net.CreateNode();
INode nodeC = net.CreateNode();
IEdge edge = net.CreateEdge(nodeA, nodeB);
bool result = net.IsEdge(nodeC, nodeA);
Assert.False(result);
}
