public void BoldTextCallVisitor_VisitMethod() { var converterMock = new Mock <IConverter>(); var boldText = new BoldText { Text = "Some bold text" }; boldText.Converter(converterMock.Object); converterMock.Verify(converter => converter.ConvertBoldText(It.Is <string>(text => string.Equals(text, boldText.Text, StringComparison.Ordinal))), Times.Once); }