public void DoesNotIncrementInDegreeOfDestinationNodeForExistingNode()
{
// Arrange
var node = new Node <string>("bar");
var sut = new Node <string>("foo");
sut.AddAdjacentNode(new Node <string>("bar"));
var inDegree = node.InDegree;
// Act
sut.AddAdjacentNode(node);
// Assert
Assert.Equal(inDegree, node.InDegree);
}
public void DoesNotAddSecondAdjacentNodeForExistingNode()
{
// Arrange
var node = new Node <string>("bar");
var sut = new Node <string>("foo");
sut.AddAdjacentNode(new Node <string>("bar"));
// Act
sut.AddAdjacentNode(node);
// Assert
var adjacentNode = Assert.Single(sut.AdjacentNodes);
Assert.Equal(node.Value, adjacentNode.Value);
}
public void IncrementsInDegreeOfDestinationNodeForNewNode()
{
// Arrange
var node = new Node <string>("bar");
var sut = new Node <string>("foo");
// Act
sut.AddAdjacentNode(node);
// Assert
Assert.Equal(1, node.InDegree);
}
public void ThrowsArgumentNullExceptionForNullNode()
{
// Arrange
var node = default(Node <string>);
var sut = new Node <string>("foo");
// Act
var exception = Record.Exception(() => sut.AddAdjacentNode(node));
// Assert
Assert.NotNull(exception);
Assert.IsType <ArgumentNullException>(exception);
}
public void ThrowsInvalidOperationExceptionWhenValueOfDestinationNodeIsEqualToValueOfSourceNode()
{
// Arrange
var node = new Node <string>("foo");
var sut = new Node <string>("foo");
// Act
var exception = Record.Exception(() => sut.AddAdjacentNode(node));
// Assert
Assert.NotNull(exception);
Assert.IsType <InvalidOperationException>(exception);
}
public void AddsAdjacentNodeForNewNode()
{
// Arrange
var node = new Node <string>("bar");
var sut = new Node <string>("foo");
// Act
sut.AddAdjacentNode(node);
// Assert
var adjacentNode = Assert.Single(sut.AdjacentNodes);
Assert.Equal(node.Value, adjacentNode.Value);
}
