// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace System.Windows.Forms.Tests;
 
public class ToolStripManagerModalMenuFilterHostedWindowsFormsMessageHookTests
{
    private static Type GetHookType()
    {
        Type? hookType = typeof(ToolStripManager).Assembly
            .GetType("System.Windows.Forms.ToolStripManager+ModalMenuFilter+HostedWindowsFormsMessageHook", throwOnError: false);
 
        ArgumentNullException.ThrowIfNull(hookType);
 
        return hookType;
    }
 
    [Fact]
    public void Constructor_DoesNotThrow()
    {
        Type hookType = GetHookType();
 
        object? hook = Activator.CreateInstance(hookType, nonPublic: true);
 
        hook.Should().BeOfType(hookType);
    }
 
    [WinFormsFact]
    public void UninstallMessageHook_DoesNotThrow_WhenCalledTwice()
    {
        Type hookType = GetHookType();
 
        object? hook = Activator.CreateInstance(hookType, nonPublic: true);
 
        hook?.TestAccessor().Dynamic.UninstallMessageHook();
        hook?.TestAccessor().Dynamic.UninstallMessageHook();
 
        bool isHooked = hook?.TestAccessor().Dynamic._isHooked;
        isHooked.Should().BeFalse();
 
        IntPtr messageHookHandle = hook?.TestAccessor().Dynamic._messageHookHandle;
        messageHookHandle.Should().Be(IntPtr.Zero);
    }
}