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Add unit tests for LinkUtilities #12647

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Add unit tests for LinkUtilities #12647

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Add unit tests for LinkUtilities
Olina-Zhang Dec 16, 2024
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Olina-Zhang Dec 18, 2024
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Olina-Zhang Dec 19, 2024
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69 changes: 69 additions & 0 deletions src/System.Windows.Forms/tests/UnitTests/System/Windows/Forms/LinkUtilitiesTests.cs
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// 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;

namespace System.Windows.Forms.Tests;

public class LinkUtilitiesTests
{
[WinFormsTheory]
[InlineData("no", LinkBehavior.NeverUnderline)]
[InlineData("hover", LinkBehavior.HoverUnderline)]
[InlineData("always", LinkBehavior.AlwaysUnderline)]
[InlineData(null, LinkBehavior.AlwaysUnderline)] // Default behavior when key is not set
public void LinkUtilities_GetIELinkBehavior_ReturnsExpected(string? registryValue, LinkBehavior expectedBehavior)
{
// Set registry value if provided
using var key = Microsoft.Win32.Registry.CurrentUser.CreateSubKey(LinkUtilities.IEMainRegPath);
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if (registryValue is not null)
{
key.SetValue("Anchor Underline", registryValue);
}
else
{
key.DeleteValue("Anchor Underline", false); // Ensure no value is set
}

LinkUtilities.GetIELinkBehavior().Should().Be(expectedBehavior);
}

[WinFormsTheory]
[InlineData(LinkBehavior.AlwaysUnderline, FontStyle.Underline, FontStyle.Underline)]
[InlineData(LinkBehavior.HoverUnderline, FontStyle.Regular, FontStyle.Underline)]
[InlineData(LinkBehavior.NeverUnderline, FontStyle.Regular, FontStyle.Regular)]
[InlineData(LinkBehavior.SystemDefault, FontStyle.Regular, FontStyle.Regular)] // Adjust if different default styles are expected
public void LinkUtilities_EnsureLinkFonts_CreatesExpectedFonts(LinkBehavior behavior, FontStyle linkFontStyle, FontStyle hoverLinkFontStyle)
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{
using Font baseFont = new("Arial", 12);
Font? linkFont = null;
Font? hoverLinkFont = null;

LinkUtilities.EnsureLinkFonts(baseFont, behavior, ref linkFont, ref hoverLinkFont);

linkFont.Should().NotBeNull();
hoverLinkFont.Should().NotBeNull();
linkFont!.Style.Should().Be(linkFontStyle);
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hoverLinkFont!.Style.Should().Be(hoverLinkFontStyle);
}

[WinFormsTheory]
[InlineData(LinkBehavior.AlwaysUnderline, FontStyle.Underline | FontStyle.Bold, FontStyle.Underline | FontStyle.Bold)]
[InlineData(LinkBehavior.HoverUnderline, FontStyle.Regular, FontStyle.Underline)]
[InlineData(LinkBehavior.NeverUnderline, FontStyle.Bold, FontStyle.Bold)]
public void LinkUtilities_EnsureLinkFonts_CreatesExpectedFonts_WithActive(LinkBehavior behavior, FontStyle linkFontStyle, FontStyle hoverLinkFontStyle)
{
using Font baseFont = new("Arial", 12);
Font? linkFont = null;
Font? hoverLinkFont = null;

LinkUtilities.EnsureLinkFonts(baseFont, behavior, ref linkFont, ref hoverLinkFont, isActive: true);

linkFont.Should().NotBeNull();
hoverLinkFont.Should().NotBeNull();
linkFont!.Style.Should().Be(linkFontStyle);
hoverLinkFont!.Style.Should().Be(hoverLinkFontStyle);
}
}
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