public async Task WhereCasWorks()
{
// insert a new document
var id = Guid.NewGuid().ToString();
var pizza = new Pizza {
SizeInches = 14, Toppings = new List <string> {
"Pepperoni", "Mushroom"
}, ExtraCheese = true
};
await Collection.InsertAsync(id, pizza);
// get document with CAS
IGetResult getResult = await Collection.GetAsync(id);
Assert.That(getResult.Cas, Is.GreaterThan(0));
// replace with CAS
pizza.ExtraCheese = false;
var replaceOptions = new ReplaceOptions();
replaceOptions.Cas(getResult.Cas); // there IS a CAS option for replace
IMutationResult replaceResult =
await Collection.ReplaceAsync(id, pizza, replaceOptions);
Assert.That(replaceResult.Cas,
Is.Not.EqualTo(getResult.Cas));
Assert.That(replaceResult.Cas,
Is.GreaterThan(0));
// upsert with CAS?
pizza.ExtraCheese = true;
var upsertOptions = new UpsertOptions();
// upsertOptions.Cas(. . . ) there is no Cas option here!
IMutationResult upsertResult =
await Collection.UpsertAsync(id, pizza, upsertOptions);
Assert.That(upsertResult.Cas,
Is.GreaterThan(0));
Assert.That(upsertResult.Cas,
Is.Not.EqualTo(getResult.Cas));
Assert.That(upsertResult.Cas,
Is.Not.EqualTo(replaceResult.Cas));
// if you have a CAS value, use replace instead
}
