using MoShiro.Measurement;

namespace MoShiro.Measurement.Tests;

public sealed class LocalAddressesTests
{
    [Fact]
    public void Linux_TemporaryTentativeDeprecatedAndFailedAddressesAreNotUsable()
    {
        const string text =
            "2409c0d0000000000000000000000001 02 40 00 80 eth0\n" + // 稳定地址：可用
            "2409c0d0000000000000000000000002 02 40 00 01 eth0\n" + // 临时（隐私）地址
            "2409c0d0000000000000000000000003 02 40 00 40 eth0\n" + // tentative
            "2409c0d0000000000000000000000004 02 40 00 20 eth0\n" + // deprecated
            "2409c0d0000000000000000000000005 02 40 00 08 eth0\n";  // dad 失败
        HashSet<string> unusable = LocalAddresses.UnusableIpv6(text);
        Assert.DoesNotContain("2409:c0d0::1", unusable);
        Assert.Contains("2409:c0d0::2", unusable);
        Assert.Contains("2409:c0d0::3", unusable);
        Assert.Contains("2409:c0d0::4", unusable);
        Assert.Contains("2409:c0d0::5", unusable);
        Assert.Empty(LocalAddresses.UnusableIpv6(null));
    }

    [Fact]
    public void Sample_NeverReturnsLoopbackPrivateOrLinkLocalAddresses()
    {
        foreach (string text in LocalAddresses.Sample())
        {
            var address = System.Net.IPAddress.Parse(text);
            Assert.True(address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork
                ? MoShiro.Protocol.PublicAddress.IsPublicIpv4(address)
                : MoShiro.Protocol.PublicAddress.IsGlobalIpv6(address));
        }
    }
}