public void constructor_should_initialize_instance()
{
var cluster = Mock.Of <IDnsMonitoringCluster>();
var dnsResolver = Mock.Of <IDnsResolver>();
var lookupDomainName = "a.b.com";
var mockEventSubscriber = new Mock <IEventSubscriber>();
var sdamInformationEventHandler = (Action <SdamInformationEvent>)(e => { });
mockEventSubscriber
.Setup(m => m.TryGetEventHandler <SdamInformationEvent>(out sdamInformationEventHandler))
.Returns(true);
var cancellationToken = new CancellationTokenSource().Token;
var subject = new DnsMonitor(cluster, dnsResolver, lookupDomainName, mockEventSubscriber.Object, cancellationToken);
subject.State.Should().Be(DnsMonitorState.Created);
subject._cancellationToken().Should().Be(cancellationToken);
subject._cluster().Should().BeSameAs(cluster);
subject._dnsResolver().Should().BeSameAs(dnsResolver);
subject._lookupDomainName().Should().Be("a.b.com");
subject._processDnsResultHasEverBeenCalled().Should().BeFalse();
subject._sdamInformationEventHandler().Should().Be(sdamInformationEventHandler);
subject._service().Should().Be("_mongodb._tcp.a.b.com");
subject._unhandledException().Should().BeNull();
}
