public void Can_use_Composite()
{
// Arrange
var sut = new FakeSut();
var rootStartingAt5 = new TestRoot<DummyItem>("Starting with IntProperty = 5", () => new DummyItem(5));
rootStartingAt5.Add(new TestLeaf<DummyItem>(rootStartingAt5, new Mutation<DummyItem>("setting it to 4", d => { d.IntProperty = 4; })));
rootStartingAt5.Add(new TestLeaf<DummyItem>(rootStartingAt5, new Mutation<DummyItem>("setting it to 3", d => { d.IntProperty = 3; })));
var adding2 = new TestComposite<DummyItem>(rootStartingAt5, new Mutation<DummyItem>("adding 2", d => { d.IntProperty = d.IntProperty + 2; }));
adding2.Add(new TestLeaf<DummyItem>(adding2, new Mutation<DummyItem>("removing 1", d => { d.IntProperty = d.IntProperty - 1; })));
adding2.Add(new TestLeaf<DummyItem>(adding2, new Mutation<DummyItem>("removing 3", d => { d.IntProperty = d.IntProperty - 3; })));
rootStartingAt5.Add(adding2);
var adding3 = new TestComposite<DummyItem>(rootStartingAt5, new Mutation<DummyItem>( "adding 3", d => { d.IntProperty = d.IntProperty + 3; }));
adding2.Add(new TestLeaf<DummyItem>(adding3, new Mutation<DummyItem>("removing 2", d => { d.IntProperty = d.IntProperty - 2; })));
adding2.Add(new TestLeaf<DummyItem>(adding3, new Mutation<DummyItem>("removing 4", d => { d.IntProperty = d.IntProperty - 4; })));
rootStartingAt5.Add(adding3);
//Assert.AreEqual("", String.Join("\n", rootStartingAt5.Enumerate().ToList().Select(t => t.Description)));
rootStartingAt5.Walk((start) =>
{
var initial = start.Arrange();
var actual = sut.DoIt(initial);
DummyAssert.AssertIsNotFive(actual, start.Description);
});
// Act
// Assert
}