public void NavigateSimpleTreeShouldSucceed()
{
var treeItem = new TreeItem
{
Items = new List <TreeItem>
{
GenerateLeaf("leaf1"),
GenerateLeaf("leaf2"),
},
Metadata = GenerateName("root")
};
var nav = new TreeNavigator(treeItem);
Assert.Equal("root", GetName(nav.Current));
var flag = nav.MoveToFirstChild();
Assert.True(flag);
Assert.Equal("leaf1", GetName(nav.Current));
flag = nav.MoveToFirstChild();
Assert.False(flag);
Assert.Equal("leaf1", GetName(nav.Current));
flag = nav.MoveToParent();
Assert.True(flag);
Assert.Equal("root", GetName(nav.Current));
flag = nav.MoveTo(s => GetName(s) == "leaf2");
Assert.True(flag);
Assert.Equal("leaf2", GetName(nav.Current));
flag = nav.MoveTo(s => GetName(s) == "root");
Assert.True(flag);
Assert.Equal("root", GetName(nav.Current));
flag = nav.AppendChild(new TreeItem {
Metadata = GenerateName("leaf3")
});
flag = nav.AppendChild(new TreeItem {
Metadata = GenerateName("leaf4")
});
Assert.True(flag);
Assert.Equal(4, treeItem.Items.Count);
Assert.Equal("leaf3", treeItem.Items[2].Metadata["name"]);
Assert.Equal("leaf4", treeItem.Items[3].Metadata["name"]);
flag = nav.RemoveChild(s => GetName(s) == "leaf2");
Assert.True(flag);
Assert.Equal(3, treeItem.Items.Count);
Assert.Equal("leaf4", treeItem.Items[2].Metadata["name"]);
Assert.Equal("root", GetName(nav.Current));
}