public void GenerateAndApplyReversePatch()
{
var initial = new PhoneBook()
{
Entries = new Dictionary <string, TestPerson>()
{
["0800JOHNDOE"] = new TestPerson()
{
FirstName = "John",
LastName = "Doe",
IsAdult = true,
},
["0800JANEDOE"] = new TestPerson()
{
FirstName = "Jane",
LastName = "Doe",
IsAdult = true,
},
},
};
using DraftScope scope = (DraftScope)DraftExtensions.CreateDraft(initial, out PhoneBook draft);
var patchGenerator = new DictionaryPatchGenerator();
var patches = new JsonPatchDocument();
var inversePatches = new JsonPatchDocument();
draft.Entries.Remove("0800JANEDOE");
draft.Entries.Add("0800BABYDOE", new TestPerson()
{
FirstName = "Baby",
LastName = "Doe",
});
// trick the scope into thinking that is finishing and should not create proxies anymore.
scope.IsFinishing = true;
patchGenerator.Generate((IDraft)draft.Entries, "/Entries", patches, inversePatches);
// inverse order of inverse patches.
inversePatches.Operations.Reverse();
var final = scope.FinishDraft <PhoneBook, IPhoneBook>(draft);
var result = IPhoneBook.Produce(initial, p =>
{
patches.ApplyTo(p);
});
result = result.Produce(p =>
{
inversePatches.ApplyTo(p);
});
Assert.Equal(2, result.Entries.Count);
Assert.Same(initial.Entries["0800JOHNDOE"], result.Entries["0800JOHNDOE"]);
Assert.Same(initial.Entries["0800JANEDOE"], result.Entries["0800JANEDOE"]);
}