Thank you for contacting Telerik Support.
I believe you will just want to Assert.IsTrue() this particular condition within your coded step.
Here is an example in which we add 1 to the value of an extracted variable, assert whether this new value is what we would expect and update the extracted variable with the new value.
num = Int32.Parse(GetExtractedValue(
Assert.IsTrue(num == expectedValue);
Please let me know whether my suggestion helps, or if you have any additional questions.
All the best,
the Telerik team