Vanara/UnitTests/PInvoke/Shell32/IconTests.cs

using NUnit.Framework;
using static Vanara.PInvoke.Kernel32;
using static Vanara.PInvoke.Shell32;
using static Vanara.PInvoke.User32;

namespace Vanara.PInvoke.Tests;

[TestFixture]
public class Shell32_IconTests
{
	[Test]
	public void ExtractAssociatedIconTest()
	{
		string icoFile = TestCaseSources.WordDoc;
		var sb = new StringBuilder(icoFile, MAX_PATH);
		ushort iidx = 0;
		using (var hIcon = ExtractAssociatedIcon(HINSTANCE.NULL, sb, ref iidx))
			Assert.That(hIcon.IsInvalid, Is.False);
		TestContext.WriteLine(sb);
	}

	[Test]
	public void ExtractAssociatedIconExTest()
	{
		string icoFile = TestCaseSources.WordDoc;
		var sb = new StringBuilder(icoFile, MAX_PATH);
		ushort iidx = 0, iid = 0;
		using var hIcon = ExtractAssociatedIconEx(HINSTANCE.NULL, sb, ref iidx, ref iid);
		Assert.That(hIcon.IsInvalid, Is.False);
		TestContext.WriteLine($"{sb}:{iidx}:{iid}");

		using var hDupIcon = DuplicateIcon(HINSTANCE.NULL, hIcon);
		Assert.That(hDupIcon.IsInvalid, Is.False);
	}

	[Test]
	public void ExtractIconTest()
	{
		using (var ico1 = ExtractIcon(HINSTANCE.NULL, "notepad.exe", 0))
			Assert.That(ico1.IsInvalid, Is.False);
		using (var ico2 = ExtractIcon(HINSTANCE.NULL, "notepad.exe", -2))
			Assert.That(ico2.IsInvalid, Is.False);
		using var icoCnt = ExtractIcon(HINSTANCE.NULL, "notepad.exe", -1);
		Assert.That(icoCnt.DangerousGetHandle().ToInt32(), Is.GreaterThanOrEqualTo(1));
	}

	[Test]
	public void ExtractIconExTest()
	{
		var smIco = new[] { new HICON(IntPtr.Zero) };
		var lgIco = new[] { new HICON(IntPtr.Zero) };
		var ico1 = ExtractIconEx("notepad.exe", 0, lgIco, smIco, 1);
		Assert.That(ico1, Is.EqualTo(2));
		Free();
		var ico2 = ExtractIconEx("notepad.exe", -2, lgIco, smIco, 1);
		Assert.That(ico2, Is.EqualTo(2));
		Free();
		var icoCnt = ExtractIconEx("notepad.exe", -1, null, null, 0);
		Assert.That(icoCnt, Is.GreaterThanOrEqualTo(1));

		void Free()
		{
			DestroyIcon(smIco[0]);
			DestroyIcon(lgIco[0]);
		}
	}

	[Test]
	public void ExtractIconExTest2()
	{
		var ico1 = ExtractIconEx("notepad.exe", 0, 1, out var lgIco, out _);
		Assert.That(ico1, Is.EqualTo(2));
		Assert.That(lgIco, Is.Not.Null.And.Length.EqualTo(1));
		var ico2 = ExtractIconEx("notepad.exe", -2, 1, out _, out _);
		Assert.That(ico2, Is.EqualTo(2));
		var icoCnt = ExtractIconEx("notepad.exe", -1, 0, out lgIco, out _);
		Assert.That(icoCnt, Is.GreaterThanOrEqualTo(1));
		Assert.That(lgIco, Is.Null);
	}

	[Test]
	public void PickIconDlgTest()
	{
		var sb = new StringBuilder("moricons.dll", MAX_PATH);
		var idx = 0;
		Assert.That(PickIconDlg(HWND.NULL, sb, (uint)sb.Length + 1, ref idx), Is.True);
	}

	[Test]
	public void SHCreateDefaultExtractIconTest()
	{
		Assert.That(SHCreateDefaultExtractIcon(typeof(IDefaultExtractIconInit).GUID, out var ppv), Is.EqualTo((HRESULT)0));
		Assert.That(ppv, Is.Not.Null);
		Marshal.FinalReleaseComObject(ppv);
	}

	[Test]
	public void SHCreateFileExtractIconWTest()
	{
		const string icoFile = @"notepad.exe";
		Assert.That(SHCreateFileExtractIconW(icoFile, FileFlagsAndAttributes.FILE_ATTRIBUTE_NORMAL, typeof(IExtractIconW).GUID, out var ppv), ResultIs.Successful);
		Assert.That(ppv, Is.Not.Null);
		((IExtractIconW)ppv).Extract(icoFile, 0, 48, out var lg, 16, out var sm).ThrowIfFailed();
		Assert.That(lg.IsInvalid, Is.False);
		Assert.That(lg.Size.Height, Is.EqualTo(48));
		Assert.That(sm.IsInvalid, Is.False);
		Assert.That(sm.Size.Height, Is.EqualTo(16));
		Marshal.FinalReleaseComObject(ppv);
	}

	[Test]
	public void SHDefExtractIconTest()
	{
		const string icoFile = @"notepad.exe";
		Assert.That(SHDefExtractIcon(icoFile, -2, 0, out _, out var sm, Macros.MAKELONG(48, 16)), Is.EqualTo((HRESULT)0));
		Assert.That(sm.IsInvalid, Is.False);
		Assert.That(sm.Size.Height, Is.EqualTo(16));
	}

	[Test]
	public void SHGetIconOverlayIndexTest()
	{
		Assert.That(SHGetIconOverlayIndex(null, IDO_SHGIOI_LINK), Is.Not.Zero);
	}

	[Test]
	public void SHGetStockIconInfoTest()
	{
		var psii = new SHSTOCKICONINFO { cbSize = (uint)Marshal.SizeOf(typeof(SHSTOCKICONINFO)) };
		Assert.That(SHGetStockIconInfo(SHSTOCKICONID.SIID_APPLICATION, SHGSI.SHGSI_ICON, ref psii), Is.EqualTo((HRESULT)0));
		Assert.That(psii.hIcon.IsNull, Is.False);
		DestroyIcon(psii.hIcon);
	}

	[Test]
	public void SHLoadNonloadedIconOverlayIdentifiersTest()
	{
		Assert.That(SHLoadNonloadedIconOverlayIdentifiers(), Is.EqualTo((HRESULT)0));
	}

	/*
	Shell_NotifyIcon
	Shell_NotifyIconGetRect
	*/
}