public async Task Resolve_ShouldUse_DnsClients_DnsServers()
{
// Arrange
var nameServers = new[]
{
new IPEndPoint(IPAddress.Parse("15.46.251.79"), 53),
new IPEndPoint(IPAddress.Parse("8.8.8.8"), 53),
new IPEndPoint(IPAddress.Parse("10.3.15.47"), 66)
};
_dnsClients.NameServers().Returns(nameServers.ToList());
_dnsClients.DnsClient(Arg.Any <IReadOnlyCollection <IPEndPoint> >()).Returns(args =>
{
var dnsClient = Substitute.For <IDnsClient>();
dnsClient.NameServers.Returns(args.ArgAt <IReadOnlyCollection <IPEndPoint> >(0));
return(dnsClient);
});
var client = new Core.OS.Net.Dns.DnsClient(_dnsClients, _networkInterfaces);
// Act
await client.Resolve("some.host", CancellationToken.None);
// Assert
client.NameServers.Should().BeEquivalentTo(nameServers);
}
public async Task Resolve_ShouldRefresh_DnsServers_When_NetworkAddressChanged()
{
// Arrange
var nameServers = new[]
{
new IPEndPoint(IPAddress.Parse("15.46.251.79"), 53),
new IPEndPoint(IPAddress.Parse("8.8.8.8"), 53),
new IPEndPoint(IPAddress.Parse("10.3.15.47"), 66)
};
_dnsClients.NameServers().Returns(nameServers.ToList());
_dnsClients.DnsClient(Arg.Any <IReadOnlyCollection <IPEndPoint> >()).Returns(args =>
{
var dnsClient = Substitute.For <IDnsClient>();
dnsClient.NameServers.Returns(args.ArgAt <IReadOnlyCollection <IPEndPoint> >(0));
return(dnsClient);
});
var client = new Core.OS.Net.Dns.DnsClient(_dnsClients, _networkInterfaces);
// Call Resolve the DNS client to initialize
await client.Resolve("some.host", CancellationToken.None);
client.NameServers.Should().BeEquivalentTo(nameServers);
// Act
// Change DNS servers
var newNameServers = new[]
{
new IPEndPoint(IPAddress.Parse("1.2.3.4"), 53),
new IPEndPoint(IPAddress.Parse("8.8.8.8"), 53)
};
_dnsClients.NameServers().Returns(newNameServers.ToList());
// Raise NetworkAddressChanged
_networkInterfaces.NetworkAddressChanged += Raise.Event();
// Call Resolve the DNS client to refresh DNS servers
await client.Resolve("another.host", CancellationToken.None);
// Assert
client.NameServers.Should().BeEquivalentTo(newNameServers);
}
