public void GetScreenshotElementNone(string actionRule) { // execute var screenshot = ExecuteAction <GetScreenshot>(MockBy.None(), actionRule) .ExtractionResults[0] .Entities[0] .EntityContentEntries["screenshot"]; // assertion (no assertion here, expected is no exception) Assert.IsTrue(File.Exists($"{OutputDir}/image-b.png")); Assert.IsTrue(screenshot.Contains("image-b.png")); }