// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#nullable disable

using System.Drawing;
using System.Windows.Forms.TestUtilities;
using Point = System.Drawing.Point;
using Size = System.Drawing.Size;

namespace System.ComponentModel.Design.Tests;

public class ByteViewerTests
{
    [WinFormsFact]
    public void ByteViewer_Ctor_Default()
    {
        using SubByteViewer control = new();
        Assert.Null(control.AccessibleDefaultActionDescription);
        Assert.Null(control.AccessibleDescription);
        Assert.Null(control.AccessibleName);
        Assert.Equal(AccessibleRole.Default, control.AccessibleRole);
        Assert.False(control.AllowDrop);
        Assert.Equal(AnchorStyles.Top | AnchorStyles.Left, control.Anchor);
        Assert.False(control.AutoScroll);
        Assert.Equal(Size.Empty, control.AutoScrollMargin);
        Assert.Equal(Size.Empty, control.AutoScrollMinSize);
        Assert.Equal(Point.Empty, control.AutoScrollPosition);
        Assert.False(control.AutoSize);
        Assert.Equal(AutoSizeMode.GrowOnly, control.AutoSizeMode);
        Assert.Equal(Control.DefaultBackColor, control.BackColor);
        Assert.Null(control.BackgroundImage);
        Assert.Equal(ImageLayout.Tile, control.BackgroundImageLayout);
        Assert.Null(control.BindingContext);
        Assert.Equal(BorderStyle.None, control.BorderStyle);
        Assert.True(control.Bottom > 0);
        Assert.Equal(new Rectangle(0, 0, control.Width, control.Height), control.Bounds);
        Assert.True(control.CanEnableIme);
        Assert.False(control.CanFocus);
        Assert.True(control.CanRaiseEvents);
        Assert.False(control.CanSelect);
        Assert.False(control.Capture);
        Assert.True(control.CausesValidation);
        Assert.Equal(TableLayoutPanelCellBorderStyle.Inset, control.CellBorderStyle);
        Assert.Equal(new Rectangle(0, 0, control.Width, control.Height), control.ClientRectangle);
        Assert.Equal(new Size(control.Width, control.Height), control.ClientSize);
        Assert.Equal(1, control.ColumnCount);
        ColumnStyle columnStyle = Assert.IsType<ColumnStyle>(Assert.Single(control.ColumnStyles));
        Assert.Equal(SizeType.Percent, columnStyle.SizeType);
        Assert.Equal(100F, columnStyle.Width);
        Assert.Same(control.LayoutSettings.ColumnStyles, control.ColumnStyles);
        Assert.Null(control.Container);
        Assert.False(control.ContainsFocus);
        Assert.Null(control.ContextMenuStrip);
        Assert.NotEmpty(control.Controls);
        Assert.Same(control.Controls, control.Controls);
        Assert.False(control.Created);
        Assert.Equal(Cursors.Default, control.Cursor);
        Assert.Equal(Cursors.Default, control.DefaultCursor);
        Assert.Equal(ImeMode.Inherit, control.DefaultImeMode);
        Assert.Equal(new Padding(3), control.DefaultMargin);
        Assert.Equal(Size.Empty, control.DefaultMaximumSize);
        Assert.Equal(Size.Empty, control.DefaultMinimumSize);
        Assert.Equal(Padding.Empty, control.DefaultPadding);
        Assert.Equal(new Size(200, 100), control.DefaultSize);
        Assert.False(control.DesignMode);
        Assert.Equal(new Rectangle(0, 0, control.Width, control.Height), control.DisplayRectangle);
        Assert.Equal(DockStyle.None, control.Dock);
        Assert.NotNull(control.DockPadding);
        Assert.Same(control.DockPadding, control.DockPadding);
        Assert.Equal(0, control.DockPadding.Top);
        Assert.Equal(0, control.DockPadding.Bottom);
        Assert.Equal(0, control.DockPadding.Left);
        Assert.Equal(0, control.DockPadding.Right);
        Assert.True(control.DoubleBuffered);
        Assert.True(control.Enabled);
        Assert.NotNull(control.Events);
        Assert.Same(control.Events, control.Events);
        Assert.False(control.Focused);
        Assert.Equal(Control.DefaultFont, control.Font);
        Assert.Equal(control.Font.Height, control.FontHeight);
        Assert.Equal(Control.DefaultForeColor, control.ForeColor);
        Assert.Equal(TableLayoutPanelGrowStyle.AddRows, control.GrowStyle);
        Assert.True(control.HasChildren);
        Assert.True(control.Height > 0);
        Assert.NotNull(control.HorizontalScroll);
        Assert.Same(control.HorizontalScroll, control.HorizontalScroll);
        Assert.False(control.HScroll);
        Assert.Equal(ImeMode.NoControl, control.ImeMode);
        Assert.Equal(ImeMode.NoControl, control.ImeModeBase);
        Assert.False(control.IsAccessible);
        Assert.False(control.IsMirrored);
        Assert.NotNull(control.LayoutEngine);
        Assert.Same(control.LayoutEngine, control.LayoutEngine);
        Assert.NotNull(control.LayoutSettings);
        Assert.Same(control.LayoutSettings, control.LayoutSettings);
        Assert.Equal(0, control.Left);
        Assert.Equal(Point.Empty, control.Location);
        Assert.Equal(new Padding(3), control.Margin);
        Assert.Equal(Size.Empty, control.MaximumSize);
        Assert.Equal(Size.Empty, control.MinimumSize);
        Assert.Equal(Padding.Empty, control.Padding);
        Assert.Null(control.Parent);
        Assert.Equal(new Size(4, 4), control.PreferredSize);
        Assert.Equal("Microsoft\u00AE .NET", control.ProductName);
        Assert.False(control.RecreatingHandle);
        Assert.Null(control.Region);
        Assert.True(control.ResizeRedraw);
        Assert.True(control.Right > 0);
        Assert.Equal(RightToLeft.No, control.RightToLeft);
        Assert.Equal(1, control.RowCount);
        RowStyle rowStyle = Assert.IsType<RowStyle>(Assert.Single(control.RowStyles));
        Assert.Equal(SizeType.Percent, rowStyle.SizeType);
        Assert.Equal(100F, rowStyle.Height);
        Assert.Same(control.LayoutSettings.RowStyles, control.RowStyles);
        Assert.True(control.ShowFocusCues);
        Assert.True(control.ShowKeyboardCues);
        Assert.Equal(new Size(control.Width, control.Height), control.Size);
        Assert.Equal(0, control.TabIndex);
        Assert.False(control.TabStop);
        Assert.Empty(control.Text);
        Assert.Equal(0, control.Top);
        Assert.Null(control.TopLevelControl);
        Assert.False(control.UseWaitCursor);
        Assert.True(control.Visible);
        Assert.NotNull(control.VerticalScroll);
        Assert.Same(control.VerticalScroll, control.VerticalScroll);
        Assert.False(control.VScroll);
        Assert.True(control.Width > 0);

        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ByteViewer_CreateParams_GetDefault_ReturnsExpected()
    {
        using SubByteViewer control = new();
        CreateParams createParams = control.CreateParams;
        Assert.Null(createParams.Caption);
        Assert.Null(createParams.ClassName);
        Assert.Equal(0x8, createParams.ClassStyle);
        Assert.Equal(0x10000, createParams.ExStyle);
        Assert.Equal(control.Height, createParams.Height);
        Assert.Equal(IntPtr.Zero, createParams.Parent);
        Assert.Null(createParams.Param);
        Assert.Equal(0x56000000, createParams.Style);
        Assert.Equal(control.Width, createParams.Width);
        Assert.Equal(0, createParams.X);
        Assert.Equal(0, createParams.Y);
        Assert.Same(createParams, control.CreateParams);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ByteViewer_GetAutoSizeMode_Invoke_ReturnsExpected()
    {
        using SubByteViewer control = new();
        Assert.Equal(AutoSizeMode.GrowOnly, control.GetAutoSizeMode());
    }

    [WinFormsFact]
    public void ByteViewer_GetBytes_Invoke_ReturnsExpected()
    {
        using ByteViewer control = new();
        Assert.Empty(control.GetBytes());
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ByteViewer_GetDisplayMode_Invoke_ReturnsExpected()
    {
        using ByteViewer control = new();
        Assert.Equal(DisplayMode.Hexdump, control.GetDisplayMode());
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [InlineData(0, true)]
    [InlineData(SubByteViewer.ScrollStateAutoScrolling, false)]
    [InlineData(SubByteViewer.ScrollStateFullDrag, false)]
    [InlineData(SubByteViewer.ScrollStateHScrollVisible, false)]
    [InlineData(SubByteViewer.ScrollStateUserHasScrolled, false)]
    [InlineData(SubByteViewer.ScrollStateVScrollVisible, false)]
    [InlineData(int.MaxValue, false)]
    [InlineData((-1), false)]
    public void ByteViewer_GetScrollState_Invoke_ReturnsExpected(int bit, bool expected)
    {
        using SubByteViewer control = new();
        Assert.Equal(expected, control.GetScrollState(bit));
    }

    [WinFormsTheory]
    [InlineData(ControlStyles.ContainerControl, true)]
    [InlineData(ControlStyles.UserPaint, true)]
    [InlineData(ControlStyles.Opaque, false)]
    [InlineData(ControlStyles.ResizeRedraw, true)]
    [InlineData(ControlStyles.FixedWidth, false)]
    [InlineData(ControlStyles.FixedHeight, false)]
    [InlineData(ControlStyles.StandardClick, true)]
    [InlineData(ControlStyles.Selectable, false)]
    [InlineData(ControlStyles.UserMouse, false)]
    [InlineData(ControlStyles.SupportsTransparentBackColor, true)]
    [InlineData(ControlStyles.StandardDoubleClick, true)]
    [InlineData(ControlStyles.AllPaintingInWmPaint, true)]
    [InlineData(ControlStyles.CacheText, false)]
    [InlineData(ControlStyles.EnableNotifyMessage, false)]
    [InlineData(ControlStyles.DoubleBuffer, false)]
    [InlineData(ControlStyles.OptimizedDoubleBuffer, true)]
    [InlineData(ControlStyles.UseTextForAccessibility, true)]
    [InlineData((ControlStyles)0, true)]
    [InlineData((ControlStyles)int.MaxValue, false)]
    [InlineData((ControlStyles)(-1), false)]
    public void ByteViewer_GetStyle_Invoke_ReturnsExpected(ControlStyles flag, bool expected)
    {
        using SubByteViewer control = new();
        Assert.Equal(expected, control.GetStyle(flag));

        // Call again to test caching.
        Assert.Equal(expected, control.GetStyle(flag));
    }

    [WinFormsFact]
    public void ByteViewer_GetTopLevel_Invoke_ReturnsExpected()
    {
        using SubByteViewer control = new();
        Assert.False(control.GetTopLevel());
    }

    [WinFormsTheory]
    [NewAndDefaultData<EventArgs>]
    public void ByteViewer_OnHandleCreated_InvokeWithHandle_CallsHandleCreated(EventArgs eventArgs)
    {
        using SubByteViewer control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.HandleCreated += handler;
        control.OnHandleCreated(eventArgs);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);

        // Remove handler.
        control.HandleCreated -= handler;
        control.OnHandleCreated(eventArgs);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [NewAndDefaultData<EventArgs>]
    public void ByteViewer_OnHandleDestroyed_Invoke_CallsHandleDestroyed(EventArgs eventArgs)
    {
        using SubByteViewer control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.HandleDestroyed += handler;
        control.OnHandleDestroyed(eventArgs);
        Assert.Equal(1, callCount);
        Assert.False(control.IsHandleCreated);

        // Remove handler.
        control.HandleDestroyed -= handler;
        control.OnHandleDestroyed(eventArgs);
        Assert.Equal(1, callCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [NewAndDefaultData<EventArgs>]
    public void ByteViewer_OnHandleDestroyed_InvokeWithHandle_CallsHandleDestroyed(EventArgs eventArgs)
    {
        using SubByteViewer control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.HandleDestroyed += handler;
        control.OnHandleDestroyed(eventArgs);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);

        // Remove handler.
        control.HandleDestroyed -= handler;
        control.OnHandleDestroyed(eventArgs);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);
    }

    public static IEnumerable<object[]> OnLayout_TestData()
    {
        yield return new object[] { new LayoutEventArgs(null, null) };
        yield return new object[] { new LayoutEventArgs(new Control(), null) };
        yield return new object[] { new LayoutEventArgs(new Control(), string.Empty) };
        yield return new object[] { new LayoutEventArgs(new Control(), "ChildIndex") };
        yield return new object[] { new LayoutEventArgs(new Control(), "Visible") };
        yield return new object[] { new LayoutEventArgs(new Control(), "Items") };
        yield return new object[] { new LayoutEventArgs(new Control(), "Rows") };
        yield return new object[] { new LayoutEventArgs(new Control(), "Columns") };
        yield return new object[] { new LayoutEventArgs(new Control(), "RowStyles") };
        yield return new object[] { new LayoutEventArgs(new Control(), "ColumnStyles") };
        yield return new object[] { new LayoutEventArgs(new Control(), "TableIndex") };
        yield return new object[] { new LayoutEventArgs(new Control(), "GrowStyle") };
        yield return new object[] { new LayoutEventArgs(new Control(), "CellBorderStyle") };
        yield return new object[] { new LayoutEventArgs(new Control(), "LayoutSettings") };
        yield return new object[] { new LayoutEventArgs(new Control(), "NoSuchProperty") };
    }

    [WinFormsTheory]
    [MemberData(nameof(OnLayout_TestData))]
    public void ByteViewer_OnLayout_Invoke_CallsLayout(LayoutEventArgs eventArgs)
    {
        using SubByteViewer control = new();
        int callCount = 0;
        LayoutEventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.Layout += handler;
        control.OnLayout(eventArgs);
        Assert.Equal(1, callCount);
        Assert.False(control.IsHandleCreated);

        // Remove handler.
        control.Layout -= handler;
        control.OnLayout(eventArgs);
        Assert.Equal(1, callCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [MemberData(nameof(OnLayout_TestData))]
    public void ByteViewer_OnLayout_InvokeWithHandle_CallsLayout(LayoutEventArgs eventArgs)
    {
        using SubByteViewer control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;
        int callCount = 0;
        LayoutEventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.Layout += handler;
        control.OnLayout(eventArgs);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(1, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Remove handler.
        control.Layout -= handler;
        control.OnLayout(eventArgs);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(2, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsFact]
    public void ByteViewer_OnLayout_InvokeNullE_ThrowsNullReferenceException()
    {
        using SubByteViewer control = new();
        Assert.Throws<NullReferenceException>(() => control.OnLayout(null));
    }

    [WinFormsTheory]
    [CommonMemberData(typeof(CommonTestHelperEx), nameof(CommonTestHelperEx.GetKeyEventArgsTheoryData))]
    public void ByteViewer_OnKeyDown_Invoke_CallsKeyDown(KeyEventArgs eventArgs)
    {
        using SubByteViewer control = new();
        int callCount = 0;
        KeyEventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.KeyDown += handler;
        control.OnKeyDown(eventArgs);
        Assert.Equal(0, callCount);

        // Remove handler.
        control.KeyDown -= handler;
        control.OnKeyDown(eventArgs);
        Assert.Equal(0, callCount);
    }

    [WinFormsFact]
    public void ByteViewer_OnPaint_Invoke_CallsPaint()
    {
        using Bitmap image = new(10, 10);
        using Graphics graphics = Graphics.FromImage(image);
        using PaintEventArgs eventArgs = new(graphics, Rectangle.Empty);

        using SubByteViewer control = new();
        int callCount = 0;
        PaintEventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.Paint += handler;
        control.OnPaint(eventArgs);
        Assert.Equal(1, callCount);
        Assert.False(control.IsHandleCreated);

        // Remove handler.
        control.Paint -= handler;
        control.OnPaint(eventArgs);
        Assert.Equal(1, callCount);
        Assert.False(control.IsHandleCreated);
    }

    public static IEnumerable<object[]> OnPaint_WithBytes_TestData()
    {
        foreach (DisplayMode displayMode in Enum.GetValues(typeof(DisplayMode)))
        {
            yield return new object[] { Array.Empty<byte>(), displayMode };
            yield return new object[] { new byte[] { 1, 2, 3 }, displayMode };
            yield return new object[] { new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 }, displayMode };
            yield return new object[] { new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }, displayMode };
        }
    }

    [WinFormsTheory]
    [MemberData(nameof(OnPaint_WithBytes_TestData))]
    public void ByteViewer_OnPaint_InvokeWithBytes_CallsPaint(byte[] bytes, DisplayMode displayMode)
    {
        using Bitmap image = new(10, 10);
        using Graphics graphics = Graphics.FromImage(image);
        using PaintEventArgs eventArgs = new(graphics, Rectangle.Empty);

        using SubByteViewer control = new();
        control.SetBytes(bytes);
        control.SetDisplayMode(displayMode);
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        int callCount = 0;
        PaintEventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.Paint += handler;
        control.OnPaint(eventArgs);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Remove handler.
        control.Paint -= handler;
        control.OnPaint(eventArgs);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsFact]
    public void ByteViewer_OnPaint_InvokeWithHandle_CallsPaint()
    {
        using Bitmap image = new(10, 10);
        using Graphics graphics = Graphics.FromImage(image);
        using PaintEventArgs eventArgs = new(graphics, Rectangle.Empty);

        using SubByteViewer control = new();
        int callCount = 0;
        PaintEventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.Paint += handler;
        control.OnPaint(eventArgs);
        Assert.Equal(1, callCount);
        Assert.False(control.IsHandleCreated);

        // Remove handler.
        control.Paint -= handler;
        control.OnPaint(eventArgs);
        Assert.Equal(1, callCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [MemberData(nameof(OnPaint_WithBytes_TestData))]
    public void ByteViewer_OnPaint_InvokeWithBytesWithHandle_CallsPaint(byte[] bytes, DisplayMode displayMode)
    {
        using Bitmap image = new(10, 10);
        using Graphics graphics = Graphics.FromImage(image);
        using PaintEventArgs eventArgs = new(graphics, Rectangle.Empty);

        using SubByteViewer control = new();
        control.SetBytes(bytes);
        control.SetDisplayMode(displayMode);
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        int callCount = 0;
        PaintEventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.Paint += handler;
        control.OnPaint(eventArgs);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Remove handler.
        control.Paint -= handler;
        control.OnPaint(eventArgs);
        Assert.Equal(1, callCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsFact]
    public void ByteViewer_OnPaint_NullE_ThrowsNullReferenceException()
    {
        using SubByteViewer control = new();
        Assert.Throws<NullReferenceException>(() => control.OnPaint(null));
    }

    [WinFormsFact]
    public void ByteViewer_SaveToFile_InvokeWithBytes_Success()
    {
        using ByteViewer control = new();
        control.SetBytes([1, 2, 3]);
        string path = "ByteViewerContent";
        try
        {
            control.SaveToFile(path);
            Assert.Equal(new byte[] { 1, 2, 3 }, File.ReadAllBytes(path));
        }
        finally
        {
            File.Delete(path);
        }
    }

    [WinFormsFact]
    public void ByteViewer_SaveToFile_InvokeNullPath_ThrowsArgumentNullException()
    {
        using ByteViewer control = new();
        control.SetBytes(Array.Empty<byte>());
        Assert.Throws<ArgumentNullException>("path", () => control.SaveToFile(null));
    }

    [WinFormsTheory]
    [InlineData("")]
    [InlineData("\0")]
    public void ByteViewer_SaveToFile_InvokeInvalidPath_ThrowsArgumentException(string path)
    {
        using ByteViewer control = new();
        control.SetBytes(Array.Empty<byte>());
        Assert.Throws<ArgumentException>("path", () => control.SaveToFile(path));
    }

    public static IEnumerable<object[]> ScrollChanged_TestData()
    {
        yield return new object[] { null, null };
        yield return new object[] { null, new EventArgs() };
        yield return new object[] { new(), null };
        yield return new object[] { new(), new EventArgs() };
    }

    [WinFormsTheory]
    [MemberData(nameof(ScrollChanged_TestData))]
    public void ByteViewer_ScrollChanged_Invoke_Success(object source, EventArgs e)
    {
        using SubByteViewer control = new();
        control.ScrollChanged(source, e);
        Assert.False(control.IsHandleCreated);

        // Call again.
        control.ScrollChanged(source, e);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [MemberData(nameof(ScrollChanged_TestData))]
    public void ByteViewer_ScrollChanged_InvokeWithHandle_Success(object source, EventArgs e)
    {
        using SubByteViewer control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        control.ScrollChanged(source, e);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(1, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Call again.
        control.ScrollChanged(source, e);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(2, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    public static IEnumerable<object[]> SetBytes_TestData()
    {
        yield return new object[] { Array.Empty<byte>() };
        yield return new object[] { new byte[] { 1, 2, 3 } };
        yield return new object[] { new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 } };
        yield return new object[] { new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 } };
    }

    [WinFormsTheory]
    [MemberData(nameof(SetBytes_TestData))]
    public void ByteViewer_SetBytes_Invoke_GetReturnExpected(byte[] bytes)
    {
        using ByteViewer control = new();
        control.SetBytes(bytes);
        Assert.Same(bytes, control.GetBytes());
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.SetBytes(bytes);
        Assert.Same(bytes, control.GetBytes());
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [MemberData(nameof(SetBytes_TestData))]
    public void ByteViewer_SetBytes_InvokeWithBytes_GetReturnExpected(byte[] bytes)
    {
        using ByteViewer control = new();
        control.SetBytes([1]);

        control.SetBytes(bytes);
        Assert.Same(bytes, control.GetBytes());
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.SetBytes(bytes);
        Assert.Same(bytes, control.GetBytes());
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ByteViewer_SetBytes_NullBytes_ThrowsArgumentNullException()
    {
        using ByteViewer control = new();
        Assert.Throws<ArgumentNullException>("bytes", () => control.SetBytes(null));
    }

    [WinFormsTheory]
    [InlineData(DisplayMode.Auto)]
    [InlineData(DisplayMode.Hexdump)]
    [InlineData(DisplayMode.Ansi)]
    [InlineData(DisplayMode.Unicode)]
    public void ByteViewer_SetDisplayMode_InvokeNoBytes_GetReturnsExpected(DisplayMode value)
    {
        using ByteViewer control = new();
        control.SetDisplayMode(value);
        Assert.Equal(value, control.GetDisplayMode());
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.SetDisplayMode(value);
        Assert.Equal(value, control.GetDisplayMode());
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [EnumData<DisplayMode>]
    public void ByteViewer_SetDisplayMode_InvokeWithBytes_GetReturnsExpected(DisplayMode value)
    {
        using ByteViewer control = new();
        control.SetBytes([1, 2, 3]);

        control.SetDisplayMode(value);
        Assert.Equal(value, control.GetDisplayMode());
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.SetDisplayMode(value);
        Assert.Equal(value, control.GetDisplayMode());
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [InlineData(DisplayMode.Ansi, 2, 3)]
    [InlineData(DisplayMode.Auto, 0, 0)]
    [InlineData(DisplayMode.Hexdump, 0, 0)]
    [InlineData(DisplayMode.Unicode, 2, 3)]
    public void ByteViewer_SetDisplayMode_InvokeWithBytesWithHandle_GetReturnsExpected(DisplayMode value, int expectedInvalidatedCallCount1, int expectedInvalidatedCallCount2)
    {
        using ByteViewer control = new();
        control.SetBytes([1, 2, 3]);
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        control.SetDisplayMode(value);
        Assert.Equal(value, control.GetDisplayMode());
        Assert.True(control.IsHandleCreated);
        Assert.Equal(expectedInvalidatedCallCount1, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set same.
        control.SetDisplayMode(value);
        Assert.Equal(value, control.GetDisplayMode());
        Assert.True(control.IsHandleCreated);
        Assert.Equal(expectedInvalidatedCallCount2, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    public static IEnumerable<object[]> SetDisplayMode_AnsiWithBytes_TestData()
    {
        yield return new object[] { new byte[] { 1, 2, 3 }, "\u0001\u0002\u0003" };
        yield return new object[] { new byte[] { (byte)'a', (byte)'b', (byte)'c' }, "abc" };
        yield return new object[] { new byte[] { (byte)'a', (byte)'b', (byte)'c', (byte)'\0', (byte)'d', (byte)'e', (byte)'f' }, $"abc\u000Bdef" };
    }

    [WinFormsTheory]
    [MemberData(nameof(SetDisplayMode_AnsiWithBytes_TestData))]
    public void ByteViewer_SetDisplayMode_AnsiWithBytes_EditReturnsExpected(byte[] bytes, string expected)
    {
        using ByteViewer control = new();
        control.SetBytes(bytes);
        control.SetDisplayMode(DisplayMode.Ansi);

        TextBox textBox = control.Controls.OfType<TextBox>().Single();
        ScrollBar scrollBar = control.Controls.OfType<ScrollBar>().Single();
        Assert.Equal(expected, textBox.Text);
        Assert.True(textBox.Visible);
        Assert.False(scrollBar.Visible);
        Assert.False(control.IsHandleCreated);

        // Set different.
        control.SetBytes([(byte)'1', (byte)'2', (byte)'3']);
        Assert.Equal("123", textBox.Text);
        Assert.True(textBox.Visible);
        Assert.False(scrollBar.Visible);
        Assert.False(control.IsHandleCreated);
    }

    public static IEnumerable<object[]> SetDisplayMode_UnicodeWithBytes_TestData()
    {
        yield return new object[] { new byte[] { 1, 0, 2, 0, 3, 0 }, "\u0001\u0002\u0003" };
        yield return new object[] { new byte[] { (byte)'a', 0, (byte)'b', 0, (byte)'c', 0 }, "abc" };
        yield return new object[] { new byte[] { (byte)'a', 0, (byte)'b', 0, (byte)'c', 0, (byte)'\0', 0, (byte)'d', 0, (byte)'e', 0, (byte)'f', 0 }, $"abc\u000Bdef" };
    }

    [WinFormsTheory]
    [MemberData(nameof(SetDisplayMode_UnicodeWithBytes_TestData))]
    public void ByteViewer_SetDisplayMode_UnicodeWithBytes_EditReturnsExpected(byte[] bytes, string expected)
    {
        using ByteViewer control = new();
        control.SetBytes(bytes);
        control.SetDisplayMode(DisplayMode.Unicode);

        TextBox textBox = control.Controls.OfType<TextBox>().Single();
        ScrollBar scrollBar = control.Controls.OfType<ScrollBar>().Single();
        Assert.Equal(expected, textBox.Text);
        Assert.True(textBox.Visible);
        Assert.False(scrollBar.Visible);
        Assert.False(control.IsHandleCreated);

        // Set different.
        control.SetBytes([(byte)'1', 0, (byte)'2', 0, (byte)'3', 0]);
        Assert.Equal("123", textBox.Text);
        Assert.True(textBox.Visible);
        Assert.False(scrollBar.Visible);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [InvalidEnumData<DisplayMode>]
    public void ByteViewer_SetDisplayMode_InvokeInvalidMode_ThrowsInvalidEnumArgumentException(DisplayMode value)
    {
        using ByteViewer control = new();
        Assert.Throws<InvalidEnumArgumentException>("mode", () => control.SetDisplayMode(value));
    }

    [WinFormsFact]
    public void ByteViewer_SetFile_InvokeNoBytes_Success()
    {
        using ByteViewer control = new();
        using TempFile file = TempFile.Create([1, 2, 3]);
        control.SetFile(file.Path);
        Assert.Equal(new byte[] { 1, 2, 3 }, control.GetBytes());
    }

    [WinFormsFact]
    public void ByteViewer_SetFile_InvokeWithBytes_Success()
    {
        using ByteViewer control = new();
        control.SetBytes([4, 5, 6]);

        using TempFile file = TempFile.Create([1, 2, 3]);
        control.SetFile(file.Path);
        Assert.Equal(new byte[] { 1, 2, 3 }, control.GetBytes());
    }

    [WinFormsFact]
    public void ByteViewer_SetFile_InvokeNullPath_ThrowsArgumentNullException()
    {
        using ByteViewer control = new();
        control.SetBytes(Array.Empty<byte>());
        Assert.Throws<ArgumentNullException>("path", () => control.SetFile(null));
    }

    [WinFormsTheory]
    [InlineData("")]
    [InlineData("\0")]
    public void ByteViewer_SetFile_InvokeInvalidPath_ThrowsArgumentException(string path)
    {
        using ByteViewer control = new();
        control.SetBytes(Array.Empty<byte>());
        Assert.Throws<ArgumentException>("path", () => control.SetFile(path));
    }

    [WinFormsTheory]
    [InlineData(-1)]
    [InlineData(0)]
    [InlineData(1)]
    public void ByteViewer_SetStartLine_InvokeNoBytes_Success(int line)
    {
        using ByteViewer control = new();
        control.SetStartLine(line);
        Assert.False(control.IsHandleCreated);

        // Call again.
        control.SetStartLine(line);
        Assert.False(control.IsHandleCreated);
    }

    public static IEnumerable<object[]> SetStartLine_WithBytes_TestData()
    {
        yield return new object[] { Array.Empty<byte>(), -1 };
        yield return new object[] { Array.Empty<byte>(), 0 };
        yield return new object[] { Array.Empty<byte>(), 1 };
        yield return new object[] { Array.Empty<byte>(), int.MaxValue };
        yield return new object[] { new byte[] { 1, 2, 3 }, -1 };
        yield return new object[] { new byte[] { 1, 2, 3 }, 0 };
        yield return new object[] { new byte[] { 1, 2, 3 }, 1 };
        yield return new object[] { new byte[] { 1, 2, 3 }, int.MaxValue };
        yield return new object[] { new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, -1 };
        yield return new object[] { new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, 0 };
        yield return new object[] { new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, 1 };
        yield return new object[] { new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, int.MaxValue };
    }

    [WinFormsTheory]
    [MemberData(nameof(SetStartLine_WithBytes_TestData))]
    public void ByteViewer_SetStartLine_InvokeWithBytes_Success(byte[] bytes, int line)
    {
        using ByteViewer control = new();
        control.SetBytes(bytes);

        control.SetStartLine(line);
        Assert.False(control.IsHandleCreated);

        // Call again.
        control.SetStartLine(line);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [InlineData(-1)]
    [InlineData(0)]
    [InlineData(1)]
    [InlineData(int.MaxValue)]
    public void ByteViewer_SetStartLine_InvokeNoBytesWithHandle_Success(int line)
    {
        using ByteViewer control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        control.SetStartLine(line);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Call again.
        control.SetStartLine(line);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsTheory]
    [MemberData(nameof(SetStartLine_WithBytes_TestData))]
    public void ByteViewer_SetStartLine_InvokeWithBytesWithHandle_Success(byte[] bytes, int line)
    {
        using ByteViewer control = new();
        control.SetBytes(bytes);
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        control.SetStartLine(line);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Call again.
        control.SetStartLine(line);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    private class SubByteViewer : ByteViewer
    {
        public new const int ScrollStateAutoScrolling = ScrollableControl.ScrollStateAutoScrolling;

        public new const int ScrollStateHScrollVisible = ScrollableControl.ScrollStateHScrollVisible;

        public new const int ScrollStateVScrollVisible = ScrollableControl.ScrollStateVScrollVisible;

        public new const int ScrollStateUserHasScrolled = ScrollableControl.ScrollStateUserHasScrolled;

        public new const int ScrollStateFullDrag = ScrollableControl.ScrollStateFullDrag;

        public new bool CanEnableIme => base.CanEnableIme;

        public new bool CanRaiseEvents => base.CanRaiseEvents;

        public new CreateParams CreateParams => base.CreateParams;

        public new Cursor DefaultCursor => base.DefaultCursor;

        public new ImeMode DefaultImeMode => base.DefaultImeMode;

        public new Padding DefaultMargin => base.DefaultMargin;

        public new Size DefaultMaximumSize => base.DefaultMaximumSize;

        public new Size DefaultMinimumSize => base.DefaultMinimumSize;

        public new Padding DefaultPadding => base.DefaultPadding;

        public new Size DefaultSize => base.DefaultSize;

        public new bool DesignMode => base.DesignMode;

        public new bool DoubleBuffered
        {
            get => base.DoubleBuffered;
            set => base.DoubleBuffered = value;
        }

        public new EventHandlerList Events => base.Events;

        public new int FontHeight
        {
            get => base.FontHeight;
            set => base.FontHeight = value;
        }

        public new ImeMode ImeModeBase
        {
            get => base.ImeModeBase;
            set => base.ImeModeBase = value;
        }

        public new bool HScroll
        {
            get => base.HScroll;
            set => base.HScroll = value;
        }

        public new bool ResizeRedraw
        {
            get => base.ResizeRedraw;
            set => base.ResizeRedraw = value;
        }

        public new bool ShowFocusCues => base.ShowFocusCues;

        public new bool ShowKeyboardCues => base.ShowKeyboardCues;

        public new bool VScroll
        {
            get => base.VScroll;
            set => base.VScroll = value;
        }

        public new AutoSizeMode GetAutoSizeMode() => base.GetAutoSizeMode();

        public new bool GetScrollState(int bit) => base.GetScrollState(bit);

        public new bool GetStyle(ControlStyles flag) => base.GetStyle(flag);

        public new bool GetTopLevel() => base.GetTopLevel();

        public new void OnHandleCreated(EventArgs e) => base.OnHandleCreated(e);

        public new void OnHandleDestroyed(EventArgs e) => base.OnHandleDestroyed(e);

        public new void OnLayout(LayoutEventArgs levent) => base.OnLayout(levent);

        public new void OnKeyDown(KeyEventArgs e) => base.OnKeyDown(e);

        public new void OnPaint(PaintEventArgs e) => base.OnPaint(e);

        public new void ScrollChanged(object source, EventArgs e) => base.ScrollChanged(source, e);
    }
}
