public async void ExistsAsyncTest(bool result)
{
_api.SetResult($"{{result: {result.ToString().ToLower()}}}");
Assert.Equal(
result,
await _collectionController.ExistsAsync("foo", "bar"));
_api.Verify(new JObject {
{ "controller", "collection" },
{ "action", "exists" },
{ "index", "foo" },
{ "collection", "bar" }
});
}