test: add unit tests for controls and rendering helpers

Add comprehensive test coverage for 20+ Skia controls including ActivityIndicator, Border, CheckBox, CollectionView, DatePicker, Editor, Grid, Image, ImageButton, Label, NavigationPage, Page, Picker, ProgressBar, RadioButton, SearchBar, Stepper, Switch, and TimePicker. Include tests for TextRenderingHelper utility methods covering color conversion, font style mapping, and font family resolution.
2026-03-06 22:43:25 -05:00
parent 077abc2feb
commit c5221ba580
22 changed files with 2717 additions and 2 deletions
--- a/tests/Views/SkiaPickerTests.cs
+++ b/tests/Views/SkiaPickerTests.cs
@@ -0,0 +1,152 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using FluentAssertions;
+using Microsoft.Maui.Graphics;
+using Microsoft.Maui.Platform;
+using SkiaSharp;
+using Xunit;
+
+namespace Microsoft.Maui.Controls.Linux.Tests.Views;
+
+public class SkiaPickerTests
+{
+    [Fact]
+    public void Constructor_SetsDefaultValues()
+    {
+        // Arrange & Act
+        var picker = new SkiaPicker();
+
+        // Assert
+        picker.SelectedIndex.Should().Be(-1);
+        picker.Title.Should().BeEmpty();
+        picker.TextColor.Should().Be(Colors.Black);
+        picker.Items.Should().BeEmpty();
+        picker.SelectedItem.Should().BeNull();
+        picker.IsOpen.Should().BeFalse();
+        picker.IsFocusable.Should().BeTrue();
+    }
+
+    [Fact]
+    public void Title_WhenSet_UpdatesProperty()
+    {
+        // Arrange
+        var picker = new SkiaPicker();
+
+        // Act
+        picker.Title = "Select an item";
+
+        // Assert
+        picker.Title.Should().Be("Select an item");
+    }
+
+    [Fact]
+    public void SelectedIndex_WhenSet_UpdatesProperty()
+    {
+        // Arrange
+        var picker = new SkiaPicker();
+        picker.Items.Add("Item 1");
+        picker.Items.Add("Item 2");
+
+        // Act
+        picker.SelectedIndex = 1;
+
+        // Assert
+        picker.SelectedIndex.Should().Be(1);
+        picker.SelectedItem.Should().Be("Item 2");
+    }
+
+    [Fact]
+    public void TextColor_WhenSet_UpdatesProperty()
+    {
+        // Arrange
+        var picker = new SkiaPicker();
+        var color = Microsoft.Maui.Graphics.Colors.Red;
+
+        // Act
+        picker.TextColor = color;
+
+        // Assert
+        picker.TextColor.Should().Be(color);
+    }
+
+    [Fact]
+    public void Items_WhenAdded_UpdatesCollection()
+    {
+        // Arrange
+        var picker = new SkiaPicker();
+
+        // Act
+        picker.Items.Add("Apple");
+        picker.Items.Add("Banana");
+        picker.Items.Add("Cherry");
+
+        // Assert
+        picker.Items.Should().HaveCount(3);
+        picker.Items[0].Should().Be("Apple");
+        picker.Items[1].Should().Be("Banana");
+        picker.Items[2].Should().Be("Cherry");
+    }
+
+    [Fact]
+    public void SetItems_ReplacesExistingItems()
+    {
+        // Arrange
+        var picker = new SkiaPicker();
+        picker.Items.Add("Old Item");
+
+        // Act
+        picker.SetItems(new[] { "New 1", "New 2" });
+
+        // Assert
+        picker.Items.Should().HaveCount(2);
+        picker.Items[0].Should().Be("New 1");
+    }
+
+    [Fact]
+    public void SelectedIndexChanged_EventCanBeSubscribed()
+    {
+        // Arrange
+        var picker = new SkiaPicker();
+        picker.Items.Add("Item 1");
+        picker.Items.Add("Item 2");
+        var eventRaised = false;
+
+        // Act
+        picker.SelectedIndexChanged += (s, e) => eventRaised = true;
+        picker.SelectedIndex = 1;
+
+        // Assert
+        eventRaised.Should().BeTrue();
+    }
+
+    [Fact]
+    public void Draw_DoesNotThrow()
+    {
+        // Arrange
+        var picker = new SkiaPicker();
+        picker.Items.Add("Test Item");
+        picker.Bounds = new Rect(0, 0, 200, 40);
+
+        using var surface = SKSurface.Create(new SKImageInfo(300, 100));
+        var canvas = surface.Canvas;
+
+        // Act & Assert
+        var exception = Record.Exception(() => picker.Draw(canvas));
+        exception.Should().BeNull();
+    }
+
+    [Fact]
+    public void Measure_ReturnsPositiveSize()
+    {
+        // Arrange
+        var picker = new SkiaPicker();
+
+        // Act
+        var size = picker.Measure(new Size(1000, 1000));
+
+        // Assert
+        size.Width.Should().BeGreaterThan(0);
+        size.Height.Should().BeGreaterThan(0);
+    }
+}