public virtual void WhenAddTagsRecursively_AllChildsMustAvailable()
{
var rootTag = new Tag("root", "scope");
rootTag.Childs.Add(new Tag("child1", "scope"));
rootTag.Childs.Add(new Tag("child2", "scope"));
Testee.AddTagsRecursively(rootTag);
Testee.GetTags().Count.Should().Be(3);
}