public void Indicate_It_Can_Extract_Only_Strings() { // arrange var extractor = new StringExtractor(); var stringBuilder = new ClrObjectBuilder(); stringBuilder.WithType("System.String"); var s = stringBuilder.Build(); var builder = new ClrObjectBuilder(); builder.WithType("System.Object"); var o = builder.Build(); // act // assert extractor.CanExtract(s, null).Should().BeTrue(); extractor.CanExtract(o, null).Should().BeFalse(); }