public void GetChildAt(int index, int[] expected)
{
IEnumerable <VirtualTree <Node <int> > > nums =
Enumerable
.Range(0, 2)
.Select(x =>
VirtualTree
.New(
new NodeWalker <int>(),
Node
.Create(x)
.AddChildren(
Enumerable
.Range(0, 3)
.Select(y => Node.Create(y))
.ToArray())));
Assert.Equal(expected, nums.GetChildAt(index).Unwrap().Select(x => x.Value).ToArray());
}
public void GetChildrenByKey_ArgumentComparerIsInvoked()
{
// Get a valid tree.
var tree = TestTreeFactory.GetSimpleTree();
// Create a mock IComparer.
Mock <IEqualityComparer <Node <int> > > mockComparer = new Mock <IEqualityComparer <Node <int> > >();
mockComparer
.Setup(mock => mock.Equals(It.IsAny <Node <int> >(), It.IsAny <Node <int> >()))
.Returns(true);
// Create a VirtualTree.
VirtualTree <Node <int> > vt = VirtualTree.New(new NodeWalker <int>(), tree);
// Create a key to use for comparison. Any key is fine.
Node <int> key = new Node <int>(0);
// Execute the GetChildren.
vt.GetChildren(key, mockComparer.Object).ToArray();
// Verify that the comparer argument was used.
mockComparer.Verify(x => x.Equals(key, It.IsAny <Node <int> >()), Times.AtLeastOnce);
}
public void GetDescendants_ByKey_PropetyComparerIsInvoked()
{
// Get a valid tree.
var tree = TestTreeFactory.GetSimpleTree();
// Create a mock IComparer.
Mock <IEqualityComparer <Node <int> > > mockComparer = new Mock <IEqualityComparer <Node <int> > >();
mockComparer
.Setup(mock => mock.Equals(It.IsAny <Node <int> >(), It.IsAny <Node <int> >()))
.Returns(true);
// Create a VirtualTree.
VirtualTree <Node <int> > vt = VirtualTree.New(new NodeWalker <int>(), tree, mockComparer.Object);
// Create a key to use for comparison. Any key is fine.
Node <int> key = new Node <int>(0);
// Execute GetDescendants.
vt.GetDescendants(key: key).ToArray();
// Verify that the VirtualTree's comparer was used.
mockComparer.Verify(x => x.Equals(It.IsAny <Node <int> >(), It.IsAny <Node <int> >()), Times.Exactly(vt.GetDegree()));
}