public void Replace_ThrowsForReferenceNotInitialized()
{
// Arrange
var reference = new IntermediateNodeReference();
// Act & Assert
var exception = Assert.Throws <InvalidOperationException>(() => reference.Replace(new BasicIntermediateNode("_")));
Assert.Equal("The reference is invalid. References initialized with the default constructor cannot modify nodes.", exception.Message);
}
public void Replace_ThrowsForNodeNotFound()
{
// Arrange
var parent = new BasicIntermediateNode("Parent");
var node1 = new BasicIntermediateNode("Node1");
var reference = new IntermediateNodeReference(parent, node1);
// Act & Assert
var exception = Assert.Throws <InvalidOperationException>(() => reference.Replace(new BasicIntermediateNode("_")));
Assert.Equal("The reference is invalid. The node 'Node1' could not be found as a child of 'Parent'.", exception.Message);
}
public void Replace_ThrowsForReadOnlyCollection()
{
// Arrange
var parent = new BasicIntermediateNode("Parent", IntermediateNodeCollection.ReadOnly);
var node1 = new BasicIntermediateNode("Node1");
var reference = new IntermediateNodeReference(parent, node1);
// Act & Assert
var exception = Assert.Throws <InvalidOperationException>(() => reference.Replace(new BasicIntermediateNode("_")));
Assert.Equal("The node 'Parent' has a read-only child collection and cannot be modified.", exception.Message);
}
public void Replace_ReplacesNode()
{
// Arrange
var parent = new BasicIntermediateNode("Parent");
var node1 = new BasicIntermediateNode("Node1");
var node2 = new BasicIntermediateNode("Node2");
var node3 = new BasicIntermediateNode("Node3");
var node4 = new BasicIntermediateNode("Node4");
parent.Children.Add(node1);
parent.Children.Add(node4);
parent.Children.Add(node3);
var reference = new IntermediateNodeReference(parent, node4);
// Act
reference.Replace(node2);
// Assert
Assert.Equal(new[] { node1, node2, node3, }, parent.Children);
}