public void ChangeParent_When_Child_Has_No_Parent()
{
Project new_parent = new Project();
Project child = new Project();
child.ChangeParent(new_parent);
Assert.That(child.Parent, Is.EqualTo(new_parent));
Assert.That(new_parent.Children.Count, Is.EqualTo(1));
Assert.That(new_parent.Children.Contains(child));
}
public void ChangeParent_When_Parent_And_New_Parent_Is_Null()
{
Project project = new Project();
project.ChangeParent(null);
Assert.That(project.Parent, Is.EqualTo(null));
}
public void ChangeParent_When_New_Parent_Is_Old_Parent()
{
Project parent = new Project();
Project child_1 = new Project();
Project child_2 = new Project();
parent.AddChild(child_1);
parent.AddChild(child_2);
child_1.ChangeParent(parent);
Assert.That(child_1.Parent, Is.EqualTo(parent));
Assert.That(child_2.Parent, Is.EqualTo(parent));
Assert.That(parent.Children.Count, Is.EqualTo(2));
Assert.That(parent.Children.Contains(child_1));
Assert.That(parent.Children.Contains(child_2));
}
public void ChangeParent_When_New_Parent_Is_Null()
{
Project parent = new Project();
Project child_1 = new Project();
parent.AddChild(child_1);
child_1.ChangeParent(null);
Assert.That(child_1.Parent, Is.EqualTo(null));
Assert.That(parent.Children.Count, Is.EqualTo(0));
}
public void ChangeParent()
{
Project parent_1 = new Project();
Project parent_2 = new Project();
Project child = new Project();
parent_1.AddChild(child);
Assert.That(child.Parent, Is.EqualTo(parent_1));
Assert.That(parent_1.Children.Count, Is.EqualTo(1));
Assert.That(parent_1.Children.Contains(child));
child.ChangeParent(parent_2);
Assert.That(child.Parent, Is.EqualTo(parent_2));
Assert.That(parent_1.Children.IsNullOrEmpty(), Is.True);
Assert.That(parent_2.Children.Count, Is.EqualTo(1));
Assert.That(parent_2.Children.Contains(child));
}