public void TestRemove()
{
var node = new HText("node");
// Create parent
var elm = new HElement("test", node);
Assert.Same(node, elm.FirstNode);
Assert.Same(node, elm.LastNode);
Assert.Same(elm, node.Parent);
Assert.Equal(1, elm.Nodes().Count());
// Remove attribute
node.Remove();
Assert.Null(elm.FirstNode);
Assert.Null(elm.LastNode);
Assert.Null(node.Parent);
Assert.Equal(0, elm.Nodes().Count());
// Fail to remove a detached node
var ioe = Assert.Throws <InvalidOperationException>(() => node.Remove());
Assert.Equal("No parent found.", ioe.Message);
}
public void TestRemoveNode()
{
HNode node1 = new HText("node 1");
HNode node2 = new HElement("node2", "value2");
HNode node3 = new HText("node 3");
HNode node4 = new HElement("node4", "value4");
// Create parent
var elm = new HElement("test", node1, node2, node3, node4);
Assert.Same(node1, elm.FirstNode);
Assert.Same(node4, elm.LastNode);
Assert.Same(elm, node1.Parent);
Assert.Null(node1.PreviousNode);
Assert.Same(node2, node1.NextNode);
Assert.Same(elm, node2.Parent);
Assert.Same(node1, node2.PreviousNode);
Assert.Same(node3, node2.NextNode);
Assert.Same(elm, node3.Parent);
Assert.Same(node2, node3.PreviousNode);
Assert.Same(node4, node3.NextNode);
Assert.Same(elm, node4.Parent);
Assert.Same(node3, node4.PreviousNode);
Assert.Null(node4.NextNode);
// Remove node2
node2.Remove();
Assert.Same(node1, elm.FirstNode);
Assert.Same(node4, elm.LastNode);
Assert.Same(elm, node1.Parent);
Assert.Null(node1.PreviousNode);
Assert.Same(node3, node1.NextNode);
Assert.Null(node2.Parent);
Assert.Null(node2.PreviousNode);
Assert.Null(node2.NextNode);
Assert.Same(elm, node3.Parent);
Assert.Same(node1, node3.PreviousNode);
Assert.Same(node4, node3.NextNode);
Assert.Same(elm, node4.Parent);
Assert.Same(node3, node4.PreviousNode);
Assert.Null(node4.NextNode);
var attrs = elm.Nodes().ToArray();
Assert.Equal(new HNode[] { node1, node3, node4 }, attrs);
// Remove node4
node4.Remove();
Assert.Same(node1, elm.FirstNode);
Assert.Same(node3, elm.LastNode);
Assert.Same(elm, node1.Parent);
Assert.Null(node1.PreviousNode);
Assert.Same(node3, node1.NextNode);
Assert.Same(elm, node3.Parent);
Assert.Same(node1, node3.PreviousNode);
Assert.Null(node3.NextNode);
Assert.Null(node4.Parent);
Assert.Null(node4.PreviousNode);
Assert.Null(node4.NextNode);
attrs = elm.Nodes().ToArray();
Assert.Equal(new HNode[] { node1, node3 }, attrs);
// Remove node1
node1.Remove();
Assert.Same(node3, elm.FirstNode);
Assert.Same(node3, elm.LastNode);
Assert.Null(node1.Parent);
Assert.Null(node1.PreviousNode);
Assert.Null(node1.NextNode);
Assert.Same(elm, node3.Parent);
Assert.Null(node3.PreviousNode);
Assert.Null(node3.NextNode);
attrs = elm.Nodes().ToArray();
Assert.Equal(new HNode[] { node3 }, attrs);
// Remove node3
node3.Remove();
Assert.Null(elm.FirstNode);
Assert.Null(elm.LastNode);
Assert.Null(node3.Parent);
Assert.Null(node3.PreviousNode);
Assert.Null(node3.NextNode);
attrs = elm.Nodes().ToArray();
Assert.Equal(new HNode[] { }, attrs);
// Fail to remove a detached attribute
var ioe = Assert.Throws <InvalidOperationException>(() => node1.Remove());
Assert.Equal("No parent found.", ioe.Message);
}
