public void SaveState()
{
var s = new StateChangedManager();
//
// Not loaded from state.
//
Assert.IsTrue(s.StateChanged);
//
// Save state.
//
s.SaveState();
//
// Saving state but not yet committed.
//
Assert.IsTrue(s.StateChanged);
//
// Successful commit.
//
s.OnStateSaved();
//
// State saved.
//
Assert.IsFalse(s.StateChanged);
}
public void SaveStateEditBeforeSaved()
{
var s = new StateChangedManager();
//
// Not loaded from state.
//
Assert.IsTrue(s.StateChanged);
//
// Save state.
//
s.SaveState();
//
// Saving state but not yet committed.
//
Assert.IsTrue(s.StateChanged);
//
// Edit state before commit.
//
s.StateChanged = true;
//
// Saving state but not yet committed and dirty again.
//
Assert.IsTrue(s.StateChanged);
//
// Successful commit.
//
s.OnStateSaved();
//
// State is dirty.
//
Assert.IsTrue(s.StateChanged);
}
public void StateManagerStackBasics()
{
var s = new StateChangedManager <List <int> >();
//
// Empty edit page.
//
Assert.AreEqual(0, s.State.Count);
//
// Add to most recent edit page.
//
s.State.Add(42);
//
// Check most recent edit page.
//
Assert.IsTrue(new[] { 42 }.SequenceEqual(s.State));
//
// Enumerate edit pages.
//
Assert.IsTrue(new[] { 42 }.SequenceEqual(s.SelectMany(page => page)));
//
// Save state.
//
var save1 = s.SaveState();
//
// Snapshot reflects all edits.
//
Assert.IsTrue(new[] { 42 }.SequenceEqual(save1.SelectMany(page => page)));
//
// Enumerate edit pages; non-committed state is still there.
//
Assert.IsTrue(new[] { 42 }.SequenceEqual(s.SelectMany(page => page)));
//
// Most recent edit page is empty.
//
Assert.AreEqual(0, s.State.Count);
//
// Add to most recent edit page.
//
s.State.Add(43);
//
// Check most recent edit page.
//
Assert.IsTrue(new[] { 43 }.SequenceEqual(s.State));
//
// Enumerate edit pages; non-committed state is still there, prepended by the new edit (reverse chronological enumeration).
//
Assert.IsTrue(new[] { 43, 42 }.SequenceEqual(s.SelectMany(page => page)));
//
// Snapshot is immutable.
//
Assert.IsTrue(new[] { 42 }.SequenceEqual(save1.SelectMany(page => page)));
//
// State saved.
//
s.OnStateSaved();
//
// Check most recent edit page.
//
Assert.IsTrue(new[] { 43 }.SequenceEqual(s.State));
//
// Enumerate edit pages; committed state has been removed.
//
Assert.IsTrue(new[] { 43 }.SequenceEqual(s.SelectMany(page => page)));
}