added updater

CursorLang.Tests/Services/UpdateOptionsTests.cs

@@ -0,0 +1,38 @@
+using CursorLang.Services;
+
+namespace CursorLang.Tests.Services;
+
+/// <summary>
+/// Where the app looks for its releases. The values belong to the build, and a
+/// wrong one shows only as an update that never arrives.
+/// </summary>
+public sealed class UpdateOptionsTests
+{
+    [Fact]
+    public void Out_of_the_box_the_releases_are_looked_for_in_the_repository_of_the_app()
+    {
+        var options = new UpdateOptions();
+
+        Assert.Equal("git.alrakis.kz", options.ServiceUri.Host);
+        Assert.Equal("alrakis/cursor-lang", options.Project);
+    }
+
+    [Fact]
+    public void Another_server_is_taken_as_it_is_given()
+    {
+        var options = new UpdateOptions
+        {
+            ServiceUri = new Uri("https://git.example.com/"),
+            Project = "team/app",
+        };
+
+        Assert.Equal("git.example.com", options.ServiceUri.Host);
+        Assert.Equal("team/app", options.Project);
+    }
+
+    [Fact]
+    public void The_app_asks_about_releases_no_more_than_once_a_day()
+    {
+        Assert.Equal(TimeSpan.FromDays(1), new UpdateOptions().CheckInterval);
+    }
+}