Inboxintel/tests/InboxIntel.UnitTests/UnsubscribeExtractionTests.cs

using FluentAssertions;
using InboxIntel.Infrastructure.Gmail;
using Xunit;

namespace InboxIntel.UnitTests;

public class UnsubscribeExtractionTests
{
    [Fact]
    public void Prefers_http_link()
    {
        var raw = "<mailto:unsub@x.com>, <https://x.com/unsub?id=42>";
        GmailMessageParser.ExtractUnsubscribeTarget(raw).Should().Be("https://x.com/unsub?id=42");
    }

    [Fact]
    public void Falls_back_to_mailto()
    {
        var raw = "<mailto:unsubscribe@news.example.com>";
        GmailMessageParser.ExtractUnsubscribeTarget(raw).Should().Be("mailto:unsubscribe@news.example.com");
    }

    [Fact]
    public void Null_when_absent()
    {
        GmailMessageParser.ExtractUnsubscribeTarget(null).Should().BeNull();
    }
}