给GetLinks新增单元测试，这次更换下载站的时候，文件拷贝过去，最后修改时间改变了。

那个 System.Data.SQLite.zip 成为了最新的一个文件

XUnitTest.Core/Web/WebClientTests.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using NewLife;
+using NewLife.Web;
+using Xunit;
+
+namespace XUnitTest.Web;
+
+public class WebClientTests
+{
+    [Fact]
+    public void GetLinks()
+    {
+        var client = new WebClientX();
+        var links = client.GetLinks("http://x.newlifex.com");
+        Assert.NotEmpty(links);
+
+        var names = "System.Data.SQLite.win-x64,System.Data.SQLite.win,System.Data.SQLite_net80,System.Data.SQLite_netstandard21,System.Data.SQLite_netstandard20,System.Data.SQLite".Split(",", ";");
+
+        links = links.Where(e => e.Name.EqualIgnoreCase(names) || e.FullName.EqualIgnoreCase(names)).ToArray();
+        var link = links.OrderByDescending(e => e.Version).ThenByDescending(e => e.Time).FirstOrDefault();
+
+        Assert.NotNull(link);
+        Assert.Equal("System.Data.SQLite.win-x64", link.Name);
+        Assert.True(link.Time >= "2024-05-14".ToDateTime());
+        Assert.Null(link.Version);
+    }
+}