public void GetFullHostName_Combines_HostNameAndEmptyDomain_Correctly()
        {
            var dnsStatic        = new DnsStatic(_mockNetworkData);
            var expectedHostname = dnsStatic.GetHostName();

            Mock.Arrange(() => _mockNetworkData.GetDomainName(Arg.IsAny <INetworkInterfaceData>())).Returns(EmptyDomainName);

            // ACT
            var actualHostname = dnsStatic.GetFullHostName();

            Assert.That(actualHostname, Is.EqualTo(expectedHostname));
        }