void CheckIt(IdentifiedObject currentState, bool verbose)
{
var type = currentState.GetType();
var newState = _factory.Create(type);
var typeAccessor = GetTypeAccessor(newState);
// only change some of the properties
foreach (var property in GetProperties(typeAccessor))
{
try
{
// 20% chance we will change the value
if (_random.Next(5) == 0)
{
continue;
}
// 80% chance we will keep the previous value
typeAccessor[newState, property] = typeAccessor[currentState, property];
}
catch (Exception exception)
{
throw new ApplicationException($"Could not set property '{property}'", exception);
}
}
// it's the same object
newState.mRID = currentState.mRID;
if (verbose)
{
Console.WriteLine($@"Getting diff for this object modification:
{currentState.ToPrettyCson()}
=>
{newState.ToPrettyCson()}
");
}
var dataSetMembers = _differ.GetDiff(new[] { currentState }, new[] { newState }).ToList();
if (dataSetMembers.Count == 0)
{
Assert.That(newState.ToPrettyCson(), Is.EqualTo(currentState.ToPrettyCson()),
"Didn't get a result from the differ, so the two states should be equal");
return;
}
Assert.That(dataSetMembers.Count, Is.EqualTo(1));
var dataSetMember = dataSetMembers.First();
if (verbose)
{
Console.WriteLine($@"Got this diff:
{dataSetMember.ToPrettyCson()}
");
}
var roundtrippedSequence = _differ.ApplyDiff(new[] { currentState }, dataSetMembers).ToList();
Assert.That(roundtrippedSequence.Count, Is.EqualTo(1));
var roundtrippedState = roundtrippedSequence.First();
if (verbose)
{
Console.WriteLine($@"Got this roundtripped state:
{roundtrippedState.ToPrettyCson()}");
}
Assert.That(roundtrippedState.ToPrettyJson(), Is.EqualTo(newState.ToPrettyJson()), $@"This state change (CURRENT):
{currentState.ToPrettyCson()}
=>
{newState.ToPrettyCson()}
yielded this diff:
{dataSetMember.ToPrettyCson()}
which, when applied to CURRENT, yielded THIS result:
{roundtrippedState.ToPrettyCson()}");
}