public void GetRegistryValue_should_get_specified_registry_value() { // Arrange var envRepos = new EnvironmentRepository(); // Act using (var key = Registry.ClassesRoot.OpenSubKey(@"TypeLib\{EAB22AC0-30C1-11CF-A7EB-0000C05BAE0B}\1.1")) { var result = envRepos.GetRegistryValue(key, null); // Assert Assert.AreEqual("Microsoft Internet Controls", result); } }