Fix restart prompt when loading text settings

src/UniGetUI.Avalonia/Views/Controls/Settings/TextboxCard.cs

@@ -110,6 +110,10 @@ public void SaveValue()
         if (CoreSettings.ResolveKey(setting_name).Contains("File"))
             sanitizedText = CoreTools.MakeValidFileName(sanitizedText);
 
+        // TextChanged is queued, so loading a setting can reach this handler too.
+        if (sanitizedText == CoreSettings.GetValue(setting_name))
+            return;
+
         if (sanitizedText != "")
             CoreSettings.SetValue(setting_name, sanitizedText);
         else

src/UniGetUI.Tests/TextboxCardTests.cs

@@ -0,0 +1,104 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Headless;
+using Avalonia.Threading;
+using CommunityToolkit.Mvvm.Input;
+using UniGetUI.Avalonia.Views.Controls.Settings;
+using UniGetUI.Core.Data;
+using CoreSettings = UniGetUI.Core.SettingsEngine.Settings;
+
+namespace UniGetUI.Tests;
+
+public sealed class TextboxCardTests : IDisposable
+{
+    private readonly HeadlessUnitTestSession _session = HeadlessUnitTestSession.StartNew(typeof(Application));
+    private readonly string _testRoot = Path.Combine(Path.GetTempPath(), nameof(TextboxCardTests), Guid.NewGuid().ToString("N"));
+
+    public TextboxCardTests()
+    {
+        CoreData.TEST_DataDirectoryOverride = Path.Combine(_testRoot, "Data");
+        Directory.CreateDirectory(CoreData.UniGetUIUserConfigurationDirectory);
+        CoreSettings.ResetSettings();
+    }
+
+    public void Dispose()
+    {
+        _session.Dispose();
+        CoreSettings.ResetSettings();
+        CoreData.TEST_DataDirectoryOverride = null;
+        Directory.Delete(_testRoot, recursive: true);
+    }
+
+    [Theory]
+    [InlineData("")]
+    [InlineData("https://example.com/icons.json")]
+    public Task LoadingSavedValueDoesNotNotify(string savedValue) => _session.Dispatch(() =>
+    {
+        CoreSettings.SetValue(CoreSettings.K.IconDataBaseURL, savedValue);
+        int events = 0;
+        int commands = 0;
+        var card = new TextboxCard
+        {
+            ValueChangedCommand = new RelayCommand(() => commands++),
+        };
+        card.ValueChanged += (_, _) => events++;
+        card.SettingName = CoreSettings.K.IconDataBaseURL;
+
+        // Avalonia posts TextChanged, so loading the value can reach handlers attached afterwards.
+        Dispatcher.UIThread.RunJobs();
+
+        Assert.Equal(0, events);
+        Assert.Equal(0, commands);
+        Assert.Equal(savedValue, CoreSettings.GetValue(CoreSettings.K.IconDataBaseURL));
+    }, CancellationToken.None);
+
+    [Fact]
+    public Task EditingAndClearingValueSavesAndNotifiesOncePerChange() => _session.Dispatch(() =>
+    {
+        var card = new TextboxCard { SettingName = CoreSettings.K.IconDataBaseURL };
+        Dispatcher.UIThread.RunJobs();
+        int events = 0;
+        int commands = 0;
+        card.ValueChanged += (_, _) => events++;
+        card.ValueChangedCommand = new RelayCommand(() => commands++);
+        TextBox textBox = Assert.Single(Assert.IsType<StackPanel>(card.Content).Children.OfType<TextBox>());
+
+        textBox.Text = "https://example.com/icons.json";
+        Dispatcher.UIThread.RunJobs();
+        card.SaveValue();
+
+        Assert.Equal(textBox.Text, CoreSettings.GetValue(CoreSettings.K.IconDataBaseURL));
+        Assert.Equal(1, events);
+        Assert.Equal(1, commands);
+
+        textBox.Text = "";
+        Dispatcher.UIThread.RunJobs();
+        card.SaveValue();
+
+        Assert.Equal("", CoreSettings.GetValue(CoreSettings.K.IconDataBaseURL));
+        Assert.False(CoreSettings.Get(CoreSettings.K.IconDataBaseURL));
+        Assert.Equal(2, events);
+        Assert.Equal(2, commands);
+    }, CancellationToken.None);
+
+    [Fact]
+    public Task NumericFilteringNotifiesOnlyWhenSanitizedValueChanges() => _session.Dispatch(() =>
+    {
+        CoreSettings.SetValue(CoreSettings.K.IconDataBaseURL, "12");
+        var card = new TextboxCard { SettingName = CoreSettings.K.IconDataBaseURL, IsNumericOnly = true };
+        Dispatcher.UIThread.RunJobs();
+        int changes = 0;
+        card.ValueChanged += (_, _) => changes++;
+        TextBox textBox = Assert.Single(Assert.IsType<StackPanel>(card.Content).Children.OfType<TextBox>());
+
+        textBox.Text = "1a2";
+        Dispatcher.UIThread.RunJobs();
+        Assert.Equal("12", textBox.Text);
+        Assert.Equal(0, changes);
+
+        textBox.Text = "3a4";
+        Dispatcher.UIThread.RunJobs();
+        Assert.Equal("34", CoreSettings.GetValue(CoreSettings.K.IconDataBaseURL));
+        Assert.Equal(1, changes);
+    }, CancellationToken.None);
+}

src/UniGetUI.Tests/UniGetUI.Tests.csproj

@@ -13,6 +13,7 @@
     </PropertyGroup>
 
     <ItemGroup>
+        <PackageReference Include="Avalonia.Headless" Version="12.0.4" />
         <PackageReference Include="coverlet.collector" Version="6.0.4">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>