public async Task AcknowledgeAsync() { var condition = new AcknowledgeableCondition(); var comment = new LocalizedText("Comment"); var response = new CallResponse { Results = new CallMethodResult[] { new CallMethodResult { StatusCode = StatusCodes.BadAttributeIdInvalid } } }; var channel = new TestRequestChannel(response); var ret = await channel.AcknowledgeAsync(condition, comment); ret .Should().Be((StatusCode)StatusCodes.BadAttributeIdInvalid); channel.Request .Should().BeEquivalentTo(new { MethodsToCall = new[] { new { ObjectId = condition.ConditionId, MethodId = NodeId.Parse(MethodIds.AcknowledgeableConditionType_Acknowledge), InputArguments = new Variant[] { condition.EventId, comment } } } }); }