public async Task Resolve_ShouldCall_DnsClientResolve_WithHostParameter()
{
// Arrange
const string host = "hostname";
const string ip = "125.247.41.7";
_ = _dnsClient.Resolve(host, Arg.Any <CancellationToken>()).Returns(ip);
// Act
var result = await DnsClientExtensions.Resolve(_dnsClient, host, TimeSpan.Zero);
// Assert
result.Should().Be(ip);
}
public async Task Resolve_ShouldBe_NullOrEmpty_WhenTimedOut()
{
// Arrange
var timeout = TimeSpan.FromMilliseconds(100);
_ = _dnsClient.Resolve(Arg.Any <string>(), Arg.Any <CancellationToken>()).Returns(async _ =>
{
await Task.Delay(timeout + TimeSpan.FromMilliseconds(200));
return("success");
});
// Act
var result = await DnsClientExtensions.Resolve(_dnsClient, "", timeout);
// Assert
result.Should().BeNullOrEmpty();
}
public async Task Resolve_ShouldCancel_CancellationToken_AfterTimeout()
{
// Arrange
var timeout = TimeSpan.FromMilliseconds(100);
CancellationToken token;
_ = _dnsClient.Resolve(Arg.Any <string>(), Arg.Do <CancellationToken>(x => token = x)).Returns(async _ =>
{
await Task.Delay(timeout + TimeSpan.FromMilliseconds(200));
return("success");
});
// Act
await DnsClientExtensions.Resolve(_dnsClient, "", timeout);
// Assert
token.IsCancellationRequested.Should().BeTrue();
}
