Add code coverage for ProgressBarRenderer

src/System.Windows.Forms/tests/UnitTests/ProgressBarRendererTest.cs

@@ -0,0 +1,117 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+#nullable enable
+
+using System.Drawing;
+using System.Windows.Forms.VisualStyles;
+
+namespace System.Windows.Forms.Tests;
+
+public class ProgressBarRendererTest
+{
+    [WinFormsFact]
+    public void IsSupported_ShouldReturnExpectedValue()
+    {
+        bool expectedValue = VisualStyleRenderer.IsSupported;
+        bool actualValue = ProgressBarRenderer.IsSupported;
+
+        actualValue.Should().Be(expectedValue);
+    }
+
+    [WinFormsFact]
+    public void DrawHorizontalBar_ShouldNotThrowException_WhenCalledWithValidParameters()
+    {
+        using Bitmap bitmap1 = new(100, 100);
+        using Bitmap bitmap2 = new(100, 100);
+        using Graphics graphics1 = Graphics.FromImage(bitmap1);
+        Rectangle rectangle1 = new(0, 0, 50, 50);
+
+        Action act = () => ProgressBarRenderer.DrawHorizontalBar(graphics1, rectangle1);
+
+        act.Should().NotThrow();
+        bitmap1.Should().BeEquivalentTo(bitmap2);
+    }
+
+    [WinFormsFact]
+    public void DrawVerticalBar_ShouldNotThrowException_WhenCalledWithValidParameters()
+    {
+        using Bitmap bitmap1 = new(100, 100);
+        using Bitmap bitmap2 = new(100, 100);
+        using Graphics graphics1 = Graphics.FromImage(bitmap1);
+        Rectangle rectangle1 = new(0, 0, 50, 50);
+
+        Action act = () => ProgressBarRenderer.DrawVerticalBar(graphics1, rectangle1);
+
+        act.Should().NotThrow();
+        bitmap1.Should().BeEquivalentTo(bitmap2);
+    }
+
+    [WinFormsFact]
+    public void DrawHorizontalChunks_ShouldNotThrowException_WhenCalledWithValidParameters()
+    {
+        using Bitmap bitmap1 = new(100, 100);
+        using Bitmap bitmap2 = new(100, 100);
+        using Graphics graphics1 = Graphics.FromImage(bitmap1);
+        Rectangle rectangle1 = new(0, 0, 50, 50);
+
+        Action act = () => ProgressBarRenderer.DrawHorizontalChunks(graphics1, rectangle1);
+
+        act.Should().NotThrow();
+        bitmap1.Should().BeEquivalentTo(bitmap2);
+    }
+
+    [WinFormsFact]
+    public void DrawVerticalChunks_ShouldNotThrowException_WhenCalledWithValidParameters()
+    {
+        using Bitmap bitmap1 = new(100, 100);
+        using Bitmap bitmap2 = new(100, 100);
+        using Graphics graphics1 = Graphics.FromImage(bitmap1);
+        Rectangle rectangle1 = new(0, 0, 50, 50);
+
+        Action act = () => ProgressBarRenderer.DrawVerticalChunks(graphics1, rectangle1);
+
+        act.Should().NotThrow();
+        bitmap1.Should().BeEquivalentTo(bitmap2);
+    }
+
+    [WinFormsFact]
+    public void ChunkThickness_ShouldReturnExpectedValue()
+    {
+        // Test with VisualStyleElement.ProgressBar.Chunk.Normal
+        bool isElementDefined1 = VisualStyleRenderer.IsElementDefined(VisualStyleElement.ProgressBar.Chunk.Normal);
+        int actualValue1 = ProgressBarRenderer.ChunkThickness;
+        int expectedValue1= 6;
+
+        isElementDefined1.Should().BeTrue();     
+        actualValue1.Should().Be(expectedValue1);
+
+        // Test with VisualStyleElement.ProgressBar.ChunkVertical.Normal
+        bool isElementDefined2 = VisualStyleRenderer.IsElementDefined(VisualStyleElement.ProgressBar.Chunk.Normal);
+        int actualValue2 = ProgressBarRenderer.ChunkThickness;
+        int expectedValue2 = 6;
+
+        isElementDefined2.Should().BeTrue();
+        actualValue2.Should().Be(expectedValue2);
+    }
+
+    [WinFormsFact]
+    public void ChunkSpaceThickness_ShouldReturnExpectedValue_BasedOnVisualStyleElement()
+    {
+        // Test with VisualStyleElement.ProgressBar.Chunk.Normal
+        bool isElementDefined1 = VisualStyleRenderer.IsElementDefined(VisualStyleElement.ProgressBar.Chunk.Normal);
+        int actualValue1 = ProgressBarRenderer.ChunkSpaceThickness;
+        int expectedValue1 = 0;
+
+        isElementDefined1.Should().BeTrue();       
+        actualValue1.Should().Be(expectedValue1);
+
+        // Test with VisualStyleElement.ProgressBar.ChunkVertical.Normal
+        bool isElementDefined2 = VisualStyleRenderer.IsElementDefined(VisualStyleElement.ProgressBar.ChunkVertical.Normal);
+        int actualValue2 = ProgressBarRenderer.ChunkSpaceThickness;
+        int expectedValue2 = 0;
+
+        isElementDefined2.Should().BeTrue();       
+        actualValue2.Should().Be(expectedValue2);
+    }
+}