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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.
using System.ComponentModel;
using System.Drawing;
using Point = System.Drawing.Point;
using Size = System.Drawing.Size;
namespace System.Windows.Forms.Tests;
public partial class TextBoxTests
{
private static readonly int s_preferredHeight = Control.DefaultFont.Height + SystemInformation.BorderSize.Height * 4 + 3;
[WinFormsFact]
public void TextBox_Ctor_Default()
{
using SubTextBox control = new();
Assert.False(control.AcceptsReturn);
Assert.False(control.AcceptsTab);
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.Empty(control.AutoCompleteCustomSource);
Assert.Same(control.AutoCompleteCustomSource, control.AutoCompleteCustomSource);
Assert.Equal(AutoCompleteMode.None, control.AutoCompleteMode);
Assert.Equal(AutoCompleteSource.None, control.AutoCompleteSource);
Assert.True(control.AutoSize);
Assert.Equal(SystemColors.Window, control.BackColor);
Assert.Null(control.BackgroundImage);
Assert.Equal(ImageLayout.Tile, control.BackgroundImageLayout);
Assert.Null(control.BindingContext);
Assert.Equal(BorderStyle.Fixed3D, control.BorderStyle);
Assert.Equal(control.PreferredHeight, control.Bottom);
Assert.Equal(new Rectangle(0, 0, 100, control.PreferredHeight), control.Bounds);
Assert.False(control.CanFocus);
Assert.True(control.CanRaiseEvents);
Assert.True(control.CanSelect);
Assert.False(control.CanUndo);
Assert.False(control.Capture);
Assert.True(control.CausesValidation);
Assert.Equal(CharacterCasing.Normal, control.CharacterCasing);
Assert.Equal(new Size(96, control.PreferredHeight - 4), control.ClientSize);
Assert.Equal(new Rectangle(0, 0, 96, control.PreferredHeight - 4), control.ClientRectangle);
Assert.Null(control.Container);
Assert.False(control.ContainsFocus);
Assert.Null(control.ContextMenuStrip);
Assert.Empty(control.Controls);
Assert.Same(control.Controls, control.Controls);
Assert.False(control.Created);
Assert.Same(Cursors.IBeam, control.Cursor);
Assert.Same(Cursors.IBeam, 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(100, control.PreferredHeight), control.DefaultSize);
Assert.False(control.DesignMode);
Assert.Equal(new Rectangle(0, 0, 96, control.PreferredHeight - 4), control.DisplayRectangle);
Assert.Equal(DockStyle.None, control.Dock);
Assert.False(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(SystemColors.WindowText, control.ForeColor);
Assert.False(control.HasChildren);
Assert.Equal(control.PreferredHeight, control.Height);
Assert.True(control.HideSelection);
Assert.False(control.IsAccessible);
Assert.False(control.IsMirrored);
Assert.NotNull(control.LayoutEngine);
Assert.Same(control.LayoutEngine, control.LayoutEngine);
Assert.Equal(0, control.Left);
Assert.Empty(control.Lines);
Assert.Equal(Point.Empty, control.Location);
Assert.Equal(new Padding(3), control.Margin);
Assert.Equal(Size.Empty, control.MaximumSize);
Assert.Equal(32767, control.MaxLength);
Assert.Equal(Size.Empty, control.MinimumSize);
Assert.False(control.Modified);
Assert.False(control.Multiline);
Assert.Equal(Padding.Empty, control.Padding);
Assert.Null(control.Parent);
Assert.Equal("Microsoft\u00AE .NET", control.ProductName);
Assert.Equal(4, control.PreferredSize.Width);
Assert.True(control.PreferredSize.Height > 0);
Assert.True(control.PreferredHeight > 0);
Assert.False(control.ReadOnly);
Assert.False(control.RecreatingHandle);
Assert.Null(control.Region);
Assert.False(control.ResizeRedraw);
Assert.Equal(100, control.Right);
Assert.Equal(RightToLeft.No, control.RightToLeft);
Assert.Equal(ScrollBars.None, control.ScrollBars);
Assert.Empty(control.SelectedText);
Assert.Equal(0, control.SelectionLength);
Assert.Equal(0, control.SelectionStart);
Assert.True(control.ShortcutsEnabled);
Assert.True(control.ShowFocusCues);
Assert.True(control.ShowKeyboardCues);
Assert.Null(control.Site);
Assert.Equal(new Size(100, control.PreferredHeight), control.Size);
Assert.Equal(0, control.TabIndex);
Assert.True(control.TabStop);
Assert.Empty(control.Text);
Assert.Equal(HorizontalAlignment.Left, control.TextAlign);
Assert.Equal(0, control.TextLength);
Assert.Equal(0, control.Top);
Assert.Null(control.TopLevelControl);
Assert.False(control.UseSystemPasswordChar);
Assert.False(control.UseWaitCursor);
Assert.True(control.Visible);
Assert.Equal(100, control.Width);
Assert.True(control.WordWrap);
Assert.False(control.IsHandleCreated);
}
[WinFormsFact]
public void TextBox_CreateParams_GetDefault_ReturnsExpected()
{
using SubTextBox control = new();
CreateParams createParams = control.CreateParams;
Assert.Null(createParams.Caption);
Assert.Equal("Edit", createParams.ClassName);
Assert.Equal(0x8, createParams.ClassStyle);
Assert.Equal(0x200, createParams.ExStyle);
Assert.Equal(control.PreferredHeight, createParams.Height);
Assert.Equal(IntPtr.Zero, createParams.Parent);
Assert.Null(createParams.Param);
Assert.Equal(0x560100C0, createParams.Style);
Assert.Equal(100, createParams.Width);
Assert.Equal(0, createParams.X);
Assert.Equal(0, createParams.Y);
Assert.Same(createParams, control.CreateParams);
Assert.False(control.IsHandleCreated);
}
[WinFormsFact]
public void TextBox_CanEnableIme_GetWithoutHandle_ReturnsExpected()
{
using SubTextBox control = new();
Assert.True(control.CanEnableIme);
Assert.True(control.IsHandleCreated);
// Get again.
Assert.True(control.CanEnableIme);
Assert.True(control.IsHandleCreated);
}
[WinFormsFact]
public void TextBox_CanEnableIme_GetWithHandle_ReturnsExpected()
{
using SubTextBox 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++;
Assert.True(control.CanEnableIme);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Get again.
Assert.True(control.CanEnableIme);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsFact]
public void TextBox_ImeMode_GetWithoutHandle_ReturnsExpected()
{
using SubTextBox control = new();
Assert.Equal(ImeMode.NoControl, control.ImeMode);
Assert.True(control.IsHandleCreated);
// Get again.
Assert.Equal(ImeMode.NoControl, control.ImeMode);
Assert.True(control.IsHandleCreated);
}
[WinFormsFact]
public void TextBox_ImeMode_GetWithHandle_ReturnsExpected()
{
using SubTextBox 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++;
Assert.Equal(ImeMode.NoControl, control.ImeMode);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Get again.
Assert.Equal(ImeMode.NoControl, control.ImeMode);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsFact]
public void TextBox_ImeModeBase_GetWithoutHandle_ReturnsExpected()
{
using SubTextBox control = new();
Assert.Equal(ImeMode.NoControl, control.ImeModeBase);
Assert.True(control.IsHandleCreated);
// Get again.
Assert.Equal(ImeMode.NoControl, control.ImeModeBase);
Assert.True(control.IsHandleCreated);
}
[WinFormsFact]
public void TextBox_ImeModeBase_GetWithHandle_ReturnsExpected()
{
using SubTextBox 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++;
Assert.Equal(ImeMode.NoControl, control.ImeModeBase);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Get again.
Assert.Equal(ImeMode.NoControl, control.ImeModeBase);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsTheory]
[InvalidEnumData<AutoCompleteMode>]
public void TextBox_AutoCompleteMode_SetInvalidValue_ThrowsInvalidEnumArgumentException(AutoCompleteMode value)
{
using SubTextBox control = new();
Action act = () => control.AutoCompleteMode = value;
act.Should().Throw<InvalidEnumArgumentException>().And.ParamName.Should().Be("value");
}
[WinFormsTheory]
[EnumData<AutoCompleteSource>]
public void TextBox_AutoCompleteSource_Set_GetReturnsExpected(AutoCompleteSource value)
{
using SubTextBox control = new()
{
AutoCompleteSource = value == AutoCompleteSource.ListItems ? AutoCompleteSource.None : value
};
if (value != AutoCompleteSource.ListItems)
{
control.AutoCompleteSource.Should().Be(value);
}
}
[WinFormsTheory]
[InvalidEnumData<AutoCompleteSource>]
public void TextBox_AutoCompleteSource_InvalidAutoCompleteSource_ThrowsInvalidEnumArgumentException(AutoCompleteSource source)
{
using SubTextBox control = new();
Action act = () => control.AutoCompleteSource = source;
act.Should().Throw<InvalidEnumArgumentException>().And.ParamName.Should().Be("value");
}
[WinFormsFact]
public void TextBox_PasswordChar_GetWithoutHandle_ReturnsExpected()
{
using SubTextBox control = new();
Assert.Equal('\0', control.PasswordChar);
Assert.True(control.IsHandleCreated);
// Get again.
Assert.Equal('\0', control.PasswordChar);
Assert.True(control.IsHandleCreated);
}
[WinFormsFact]
public void TextBox_PasswordChar_GetWithHandle_ReturnsExpected()
{
using SubTextBox 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++;
Assert.Equal('\0', control.PasswordChar);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Get again.
Assert.Equal('\0', control.PasswordChar);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsFact]
public void TextBox_PlaceholderText()
{
using TextBox tb = new()
{
PlaceholderText = "Enter your name"
};
Assert.False(string.IsNullOrEmpty(tb.PlaceholderText));
}
[WinFormsFact]
public void TextBox_PlaceholderText_DefaultValue()
{
using TextBox tb = new();
Assert.Equal(string.Empty, tb.PlaceholderText);
}
[WinFormsFact]
public void TextBox_PlaceholderText_When_InAccessibility_Doesnot_Raise_TextChanged()
{
using SubTextBox tb = new();
bool eventRaised = false;
EventHandler handler = (o, e) => eventRaised = true;
tb.TextChanged += handler;
tb.CreateAccessibilityInstance();
Assert.False(eventRaised);
tb.TextChanged -= handler;
}
public static IEnumerable<object[]> TextBox_ShouldRenderPlaceHolderText_TestData()
{
// Test PlaceholderText
yield return new object[] { null, /* isUserPaint */ false, /* isIsFocused */ false, /* textCount */ 0, /* expected */ false };
yield return new object[] { "", /* isUserPaint */ false, /* isIsFocused */ false, /* textCount */ 0, /* expected */ false };
// Test UserPaint
yield return new object[] { "Text", /* isUserPaint */ true, /* isIsFocused */ false, /* textCount */ 0, /* expected */ false };
// Test Focused
yield return new object[] { "Text", /* isUserPaint */ false, /* isIsFocused */ true, /* textCount */ 0, /* expected */ false };
// Test TextLength
yield return new object[] { "Text", /* isUserPaint */ false, /* isIsFocused */ false, /* textCount */ 1, /* expected */ false };
// Happy path
yield return new object[] { "Text", /* isUserPaint */ false, /* isIsFocused */ false, /* textCount */ 0, /* expected */ true };
}
[WinFormsTheory]
[MemberData(nameof(TextBox_ShouldRenderPlaceHolderText_TestData))]
public void TextBox_ShouldRenderPlaceHolderText(string text, bool isUserPaint, bool isIsFocused, int textCount, bool expected)
{
using SubTextBox textBox = new() { PlaceholderText = text, IsUserPaint = isUserPaint, IsFocused = isIsFocused, TextCount = textCount };
bool result = textBox.TestAccessor().Dynamic.ShouldRenderPlaceHolderText();
Assert.Equal(expected, result);
}
[WinFormsFact]
public void TextBox_PlaceholderText_NullValue_CoercedTo_StringEmpty()
{
using TextBox tb = new()
{
PlaceholderText = "Text"
};
tb.PlaceholderText = null;
Assert.Equal(string.Empty, tb.PlaceholderText);
}
[WinFormsFact]
public void TextBox_PlaceholderText_Overridden()
{
using SubTextBox tb = new();
Assert.NotNull(tb);
}
[WinFormsFact]
public void TextBox_PlaceholderTextAlignments()
{
using TextBox tb = new()
{
PlaceholderText = "Enter your name"
};
// Cover the Placeholder draw code path
PInvokeCore.SendMessage(tb, PInvokeCore.WM_PAINT, (WPARAM)(BOOL)false);
tb.TextAlign = HorizontalAlignment.Center;
PInvokeCore.SendMessage(tb, PInvokeCore.WM_PAINT, (WPARAM)(BOOL)false);
tb.TextAlign = HorizontalAlignment.Right;
PInvokeCore.SendMessage(tb, PInvokeCore.WM_PAINT, (WPARAM)(BOOL)false);
Assert.False(string.IsNullOrEmpty(tb.PlaceholderText));
}
[WinFormsFact]
public void TextBox_PlaceholderTextAlignmentsInRightToLeft()
{
using TextBox tb = new()
{
PlaceholderText = "Enter your name",
RightToLeft = RightToLeft.Yes
};
// Cover the Placeholder draw code path in RightToLeft scenario
PInvokeCore.SendMessage(tb, PInvokeCore.WM_PAINT, (WPARAM)(BOOL)false);
tb.TextAlign = HorizontalAlignment.Center;
PInvokeCore.SendMessage(tb, PInvokeCore.WM_PAINT, (WPARAM)(BOOL)false);
tb.TextAlign = HorizontalAlignment.Right;
PInvokeCore.SendMessage(tb, PInvokeCore.WM_PAINT, (WPARAM)(BOOL)false);
Assert.False(string.IsNullOrEmpty(tb.PlaceholderText));
}
[WinFormsTheory]
[InlineData(true, AccessibleRole.Text)]
[InlineData(false, AccessibleRole.None)]
public void TextBox_CreateAccessibilityInstance_Invoke_ReturnsExpected(bool createControl, AccessibleRole expectedAccessibleRole)
{
using SubTextBox control = new();
if (createControl)
{
control.CreateControl();
}
Assert.Equal(createControl, control.IsHandleCreated);
Control.ControlAccessibleObject instance = Assert.IsType<TextBox.TextBoxAccessibleObject>(control.CreateAccessibilityInstance());
Assert.Equal(createControl, control.IsHandleCreated);
Assert.NotNull(instance);
Assert.Same(control, instance.Owner);
Assert.Equal(expectedAccessibleRole, instance.Role);
Assert.NotSame(control.CreateAccessibilityInstance(), instance);
Assert.NotSame(control.AccessibilityObject, instance);
Assert.Equal(createControl, control.IsHandleCreated);
}
[WinFormsFact]
public void TextBox_CreateAccessibilityInstance_InvokeWithCustomRole_ReturnsExpected()
{
using SubTextBox control = new()
{
AccessibleRole = AccessibleRole.HelpBalloon
};
Control.ControlAccessibleObject instance = Assert.IsType<TextBox.TextBoxAccessibleObject>(control.CreateAccessibilityInstance());
Assert.NotNull(instance);
Assert.Same(control, instance.Owner);
Assert.Equal(AccessibleRole.HelpBalloon, instance.Role);
Assert.NotSame(control.CreateAccessibilityInstance(), instance);
Assert.NotSame(control.AccessibilityObject, instance);
Assert.False(control.IsHandleCreated);
}
[WinFormsFact]
public void TextBox_GetAutoSizeMode_Invoke_ReturnsExpected()
{
using SubTextBox control = new();
Assert.Equal(AutoSizeMode.GrowOnly, control.GetAutoSizeMode());
}
[WinFormsTheory]
[InlineData(ControlStyles.ContainerControl, false)]
[InlineData(ControlStyles.UserPaint, false)]
[InlineData(ControlStyles.Opaque, false)]
[InlineData(ControlStyles.ResizeRedraw, false)]
[InlineData(ControlStyles.FixedWidth, false)]
[InlineData(ControlStyles.FixedHeight, true)]
[InlineData(ControlStyles.StandardClick, false)]
[InlineData(ControlStyles.Selectable, true)]
[InlineData(ControlStyles.UserMouse, false)]
[InlineData(ControlStyles.SupportsTransparentBackColor, false)]
[InlineData(ControlStyles.StandardDoubleClick, false)]
[InlineData(ControlStyles.AllPaintingInWmPaint, true)]
[InlineData(ControlStyles.CacheText, false)]
[InlineData(ControlStyles.EnableNotifyMessage, false)]
[InlineData(ControlStyles.DoubleBuffer, false)]
[InlineData(ControlStyles.OptimizedDoubleBuffer, false)]
[InlineData(ControlStyles.UseTextForAccessibility, false)]
[InlineData((ControlStyles)0, true)]
[InlineData((ControlStyles)int.MaxValue, false)]
[InlineData((ControlStyles)(-1), false)]
public void TextBox_GetStyle_Invoke_ReturnsExpected(ControlStyles flag, bool expected)
{
using SubTextBox control = new();
Assert.Equal(expected, control.GetStyle(flag));
// Call again to test caching.
Assert.Equal(expected, control.GetStyle(flag));
}
[WinFormsFact]
public void TextBox_GetTopLevel_Invoke_ReturnsExpected()
{
using SubTextBox control = new();
Assert.False(control.GetTopLevel());
}
[WinFormsTheory]
[NewAndDefaultData<EventArgs>]
public void TextBox_OnHandleCreated_Invoke_CallsHandleCreated(EventArgs eventArgs)
{
using SubTextBox control = new();
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.Equal(s_preferredHeight, control.Height);
Assert.False(control.IsHandleCreated);
// Remove handler.
control.HandleCreated -= handler;
control.OnHandleCreated(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(s_preferredHeight, control.Height);
Assert.False(control.IsHandleCreated);
}
[WinFormsTheory]
[NewAndDefaultData<EventArgs>]
public void TextBox_OnHandleCreated_InvokeWithHandle_CallsHandleCreated(EventArgs eventArgs)
{
using SubTextBox 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.Equal(s_preferredHeight, control.Height);
Assert.True(control.IsHandleCreated);
// Remove handler.
control.HandleCreated -= handler;
control.OnHandleCreated(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(s_preferredHeight, control.Height);
Assert.True(control.IsHandleCreated);
}
[WinFormsTheory]
[NewAndDefaultData<EventArgs>]
public void TextBox_OnHandleDestroyed_Invoke_CallsHandleDestroyed(EventArgs eventArgs)
{
using SubTextBox 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);
}
public static IEnumerable<object[]> OnHandleDestroyed_TestData()
{
foreach (bool modified in new bool[] { true, false })
{
yield return new object[] { modified, null };
yield return new object[] { modified, new EventArgs() };
}
}
[WinFormsTheory]
[MemberData(nameof(OnHandleDestroyed_TestData))]
public void TextBox_OnHandleDestroyed_InvokeWithHandle_CallsHandleDestroyed(bool modified, EventArgs eventArgs)
{
using SubTextBox control = new()
{
Text = "Text",
SelectionStart = 1,
SelectionLength = 2,
Modified = modified
};
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;
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.Equal(s_preferredHeight, control.Height);
Assert.Equal(0, control.SelectionStart);
Assert.Equal(0, control.SelectionLength);
Assert.Equal(modified, control.Modified);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Remove handler.
control.HandleDestroyed -= handler;
control.OnHandleDestroyed(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(s_preferredHeight, control.Height);
Assert.Equal(0, control.SelectionStart);
Assert.Equal(0, control.SelectionLength);
Assert.Equal(modified, control.Modified);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
private class SubTextBox : TextBox
{
public int TextCount;
public bool IsFocused;
public bool TextAccessed;
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 IsHandleCreated => base.IsHandleCreated;
public new bool ResizeRedraw
{
get => base.ResizeRedraw;
set => base.ResizeRedraw = value;
}
public new bool ShowFocusCues => base.ShowFocusCues;
public new bool ShowKeyboardCues => base.ShowKeyboardCues;
public override string PlaceholderText { get => base.PlaceholderText; set => base.PlaceholderText = value; }
public new AccessibleObject CreateAccessibilityInstance() => base.CreateAccessibilityInstance();
public new AutoSizeMode GetAutoSizeMode() => base.GetAutoSizeMode();
public new bool GetStyle(ControlStyles flag) => base.GetStyle(flag);
public new bool GetTopLevel() => base.GetTopLevel();
public override bool Focused => IsFocused;
public override int TextLength => TextCount;
public override string Text
{
get
{
TextAccessed = true;
return base.Text;
}
set => base.Text = value;
}
public bool IsUserPaint
{
get => GetStyle(ControlStyles.UserPaint);
set => SetStyle(ControlStyles.UserPaint, value);
}
public new void CreateControl() => base.CreateControl();
public new void OnHandleCreated(EventArgs e) => base.OnHandleCreated(e);
public new void OnHandleDestroyed(EventArgs e) => base.OnHandleDestroyed(e);
}
}
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