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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 System.Windows.Forms.Layout;
using Moq;
using System.Windows.Forms.TestUtilities;
namespace System.Windows.Forms.Tests;
public class PanelTests
{
[WinFormsFact]
public void Panel_Ctor_Default()
{
using SubPanel 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.Equal(100, control.Bottom);
Assert.Equal(new Rectangle(0, 0, 200, 100), 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(new Rectangle(0, 0, 200, 100), control.ClientRectangle);
Assert.Equal(new Size(200, 100), control.ClientSize);
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.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, 200, 100), 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.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(Control.DefaultForeColor, control.ForeColor);
Assert.False(control.HasChildren);
Assert.Equal(100, control.Height);
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.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(Size.Empty, control.PreferredSize);
Assert.Equal("Microsoft\u00AE .NET", control.ProductName);
Assert.False(control.RecreatingHandle);
Assert.Null(control.Region);
Assert.False(control.ResizeRedraw);
Assert.Equal(200, control.Right);
Assert.Equal(RightToLeft.No, control.RightToLeft);
Assert.True(control.ShowFocusCues);
Assert.True(control.ShowKeyboardCues);
Assert.Equal(new Size(200, 100), 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.Equal(200, control.Width);
Assert.False(control.IsHandleCreated);
}
[WinFormsFact]
public void Panel_CreateParams_GetDefault_ReturnsExpected()
{
using SubPanel 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(100, createParams.Height);
Assert.Equal(IntPtr.Zero, createParams.Parent);
Assert.Null(createParams.Param);
Assert.Equal(0x56000000, createParams.Style);
Assert.Equal(200, createParams.Width);
Assert.Equal(0, createParams.X);
Assert.Equal(0, createParams.Y);
Assert.Same(createParams, control.CreateParams);
Assert.False(control.IsHandleCreated);
}
[WinFormsTheory]
[InlineData(BorderStyle.None, 0x56000000, 0x10000)]
[InlineData(BorderStyle.Fixed3D, 0x56000000, 0x10200)]
[InlineData(BorderStyle.FixedSingle, 0x56800000, 0x10000)]
public void Panel_CreateParams_GetBorderStyle_ReturnsExpected(BorderStyle borderStyle, int expectedStyle, int expectedExStyle)
{
using SubPanel control = new()
{
BorderStyle = borderStyle
};
CreateParams createParams = control.CreateParams;
Assert.Null(createParams.Caption);
Assert.Null(createParams.ClassName);
Assert.Equal(0x8, createParams.ClassStyle);
Assert.Equal(expectedExStyle, createParams.ExStyle);
Assert.Equal(100, createParams.Height);
Assert.Equal(IntPtr.Zero, createParams.Parent);
Assert.Null(createParams.Param);
Assert.Equal(expectedStyle, createParams.Style);
Assert.Equal(200, createParams.Width);
Assert.Equal(0, createParams.X);
Assert.Equal(0, createParams.Y);
Assert.Same(createParams, control.CreateParams);
}
[WinFormsTheory]
[BoolData]
public void Panel_AutoSize_Set_GetReturnsExpected(bool value)
{
using Panel control = new();
int layoutCallCount = 0;
control.Layout += (sender, e) => layoutCallCount++;
control.AutoSize = value;
Assert.Equal(value, control.AutoSize);
Assert.Equal(0, layoutCallCount);
Assert.False(control.IsHandleCreated);
// Set same.
control.AutoSize = value;
Assert.Equal(value, control.AutoSize);
Assert.Equal(0, layoutCallCount);
Assert.False(control.IsHandleCreated);
// Set different.
control.AutoSize = !value;
Assert.Equal(!value, control.AutoSize);
Assert.Equal(0, layoutCallCount);
Assert.False(control.IsHandleCreated);
}
[WinFormsFact]
public void Panel_AutoSize_SetWithHandler_CallsAutoSizeChanged()
{
using Panel control = new()
{
AutoSize = true
};
int callCount = 0;
EventHandler handler = (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(EventArgs.Empty, e);
callCount++;
};
control.AutoSizeChanged += handler;
// Set different.
control.AutoSize = false;
Assert.False(control.AutoSize);
Assert.Equal(1, callCount);
// Set same.
control.AutoSize = false;
Assert.False(control.AutoSize);
Assert.Equal(1, callCount);
// Set different.
control.AutoSize = true;
Assert.True(control.AutoSize);
Assert.Equal(2, callCount);
// Remove handler.
control.AutoSizeChanged -= handler;
control.AutoSize = false;
Assert.False(control.AutoSize);
Assert.Equal(2, callCount);
}
[WinFormsTheory]
[EnumData<AutoSizeMode>]
public void Panel_AutoSizeMode_Set_GetReturnsExpected(AutoSizeMode value)
{
using SubPanel control = new();
int layoutCallCount = 0;
control.Layout += (sender, e) => layoutCallCount++;
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.False(control.IsHandleCreated);
Assert.Equal(0, layoutCallCount);
// Set same.
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.False(control.IsHandleCreated);
Assert.Equal(0, layoutCallCount);
}
[WinFormsTheory]
[InlineData(AutoSizeMode.GrowAndShrink, 1)]
[InlineData(AutoSizeMode.GrowOnly, 0)]
public void Panel_AutoSizeMode_SetWithParent_GetReturnsExpected(AutoSizeMode value, int expectedLayoutCallCount)
{
using Control parent = new();
using SubPanel control = new()
{
Parent = parent
};
int layoutCallCount = 0;
control.Layout += (sender, e) => layoutCallCount++;
int parentLayoutCallCount = 0;
void parentHandler(object sender, LayoutEventArgs e)
{
Assert.Same(parent, sender);
Assert.Same(control, e.AffectedControl);
Assert.Equal("AutoSize", e.AffectedProperty);
parentLayoutCallCount++;
}
parent.Layout += parentHandler;
try
{
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.False(control.IsHandleCreated);
Assert.Equal(0, layoutCallCount);
Assert.False(parent.IsHandleCreated);
Assert.Equal(expectedLayoutCallCount, parentLayoutCallCount);
// Set same.
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.False(control.IsHandleCreated);
Assert.Equal(0, layoutCallCount);
Assert.False(parent.IsHandleCreated);
Assert.Equal(expectedLayoutCallCount, parentLayoutCallCount);
}
finally
{
parent.Layout -= parentHandler;
}
}
[WinFormsTheory]
[InlineData(AutoSizeMode.GrowAndShrink, 1)]
[InlineData(AutoSizeMode.GrowOnly, 0)]
public void Panel_AutoSizeMode_SetWithCustomLayoutEngineParent_GetReturnsExpected(AutoSizeMode value, int expectedLayoutCallCount)
{
using CustomLayoutEngineControl parent = new();
using SubPanel control = new()
{
Parent = parent
};
parent.SetLayoutEngine(new SubLayoutEngine());
int layoutCallCount = 0;
control.Layout += (sender, e) => layoutCallCount++;
int parentLayoutCallCount = 0;
void parentHandler(object sender, LayoutEventArgs e)
{
Assert.Same(parent, sender);
Assert.Same(control, e.AffectedControl);
Assert.Equal("AutoSize", e.AffectedProperty);
parentLayoutCallCount++;
}
parent.Layout += parentHandler;
try
{
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.False(control.IsHandleCreated);
Assert.Equal(0, layoutCallCount);
Assert.False(parent.IsHandleCreated);
Assert.Equal(expectedLayoutCallCount, parentLayoutCallCount);
// Set same.
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.False(control.IsHandleCreated);
Assert.Equal(0, layoutCallCount);
Assert.False(parent.IsHandleCreated);
Assert.Equal(expectedLayoutCallCount, parentLayoutCallCount);
}
finally
{
parent.Layout -= parentHandler;
}
}
private class CustomLayoutEngineControl : Control
{
private LayoutEngine _layoutEngine;
public CustomLayoutEngineControl()
{
_layoutEngine = new Control().LayoutEngine;
}
public void SetLayoutEngine(LayoutEngine layoutEngine)
{
_layoutEngine = layoutEngine;
}
public override LayoutEngine LayoutEngine => _layoutEngine;
}
private class SubLayoutEngine : LayoutEngine
{
}
[WinFormsTheory]
[EnumData<AutoSizeMode>]
public void Panel_AutoSizeMode_SetWithHandle_GetReturnsExpected(AutoSizeMode value)
{
using SubPanel 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.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Set same.
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsTheory]
[InlineData(AutoSizeMode.GrowAndShrink, 1)]
[InlineData(AutoSizeMode.GrowOnly, 0)]
public void Panel_AutoSizeMode_SetWithParentWithHandle_GetReturnsExpected(AutoSizeMode value, int expectedLayoutCallCount)
{
using Control parent = new();
using SubPanel control = new()
{
Parent = parent
};
int layoutCallCount = 0;
control.Layout += (sender, e) => layoutCallCount++;
int parentLayoutCallCount = 0;
void parentHandler(object sender, LayoutEventArgs e)
{
Assert.Same(parent, sender);
Assert.Same(control, e.AffectedControl);
Assert.Equal("AutoSize", e.AffectedProperty);
parentLayoutCallCount++;
}
parent.Layout += parentHandler;
Assert.NotEqual(IntPtr.Zero, parent.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 parentInvalidatedCallCount = 0;
parent.Invalidated += (sender, e) => parentInvalidatedCallCount++;
int parentStyleChangedCallCount = 0;
parent.StyleChanged += (sender, e) => parentStyleChangedCallCount++;
int parentCreatedCallCount = 0;
parent.HandleCreated += (sender, e) => parentCreatedCallCount++;
try
{
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.Equal(0, layoutCallCount);
Assert.Equal(expectedLayoutCallCount, parentLayoutCallCount);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
Assert.True(parent.IsHandleCreated);
Assert.Equal(0, parentInvalidatedCallCount);
Assert.Equal(0, parentStyleChangedCallCount);
Assert.Equal(0, parentCreatedCallCount);
// Set same.
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.Equal(0, layoutCallCount);
Assert.Equal(expectedLayoutCallCount, parentLayoutCallCount);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
Assert.True(parent.IsHandleCreated);
Assert.Equal(0, parentInvalidatedCallCount);
Assert.Equal(0, parentStyleChangedCallCount);
Assert.Equal(0, parentCreatedCallCount);
}
finally
{
parent.Layout -= parentHandler;
}
}
[WinFormsTheory]
[InlineData(AutoSizeMode.GrowAndShrink, 1)]
[InlineData(AutoSizeMode.GrowOnly, 0)]
public void Panel_AutoSizeMode_SetWithCustomLayoutEngineParentWithHandle_GetReturnsExpected(AutoSizeMode value, int expectedLayoutCallCount)
{
using CustomLayoutEngineControl parent = new();
using SubPanel control = new()
{
Parent = parent
};
int layoutCallCount = 0;
control.Layout += (sender, e) => layoutCallCount++;
int parentLayoutCallCount = 0;
void parentHandler(object sender, LayoutEventArgs e)
{
Assert.Same(parent, sender);
Assert.Same(control, e.AffectedControl);
Assert.Equal("AutoSize", e.AffectedProperty);
parentLayoutCallCount++;
}
parent.Layout += parentHandler;
Assert.NotEqual(IntPtr.Zero, parent.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 parentInvalidatedCallCount = 0;
parent.Invalidated += (sender, e) => parentInvalidatedCallCount++;
int parentStyleChangedCallCount = 0;
parent.StyleChanged += (sender, e) => parentStyleChangedCallCount++;
int parentCreatedCallCount = 0;
parent.HandleCreated += (sender, e) => parentCreatedCallCount++;
try
{
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.Equal(0, layoutCallCount);
Assert.Equal(expectedLayoutCallCount, parentLayoutCallCount);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
Assert.True(parent.IsHandleCreated);
Assert.Equal(0, parentInvalidatedCallCount);
Assert.Equal(0, parentStyleChangedCallCount);
Assert.Equal(0, parentCreatedCallCount);
// Set same.
control.AutoSizeMode = value;
Assert.Equal(value, control.AutoSizeMode);
Assert.Equal(value, control.GetAutoSizeMode());
Assert.Equal(0, layoutCallCount);
Assert.Equal(expectedLayoutCallCount, parentLayoutCallCount);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
Assert.True(parent.IsHandleCreated);
Assert.Equal(0, parentInvalidatedCallCount);
Assert.Equal(0, parentStyleChangedCallCount);
Assert.Equal(0, parentCreatedCallCount);
}
finally
{
parent.Layout -= parentHandler;
}
}
[WinFormsTheory]
[InvalidEnumData<AutoSizeMode>]
public void Panel_AutoSizeMode_SetInvalid_ThrowsInvalidEnumArgumentException(AutoSizeMode value)
{
using Panel control = new();
Assert.Throws<InvalidEnumArgumentException>("value", () => control.AutoSizeMode = value);
}
[WinFormsTheory]
[EnumData<BorderStyle>]
public void Panel_BorderStyle_Set_GetReturnsExpected(BorderStyle value)
{
using Panel control = new()
{
BorderStyle = value
};
Assert.Equal(value, control.BorderStyle);
Assert.False(control.IsHandleCreated);
// Set same.
control.BorderStyle = value;
Assert.Equal(value, control.BorderStyle);
Assert.False(control.IsHandleCreated);
}
[WinFormsTheory]
[InlineData(BorderStyle.Fixed3D, 1)]
[InlineData(BorderStyle.FixedSingle, 1)]
[InlineData(BorderStyle.None, 0)]
public void Panel_BorderStyle_SetWithHandle_GetReturnsExpected(BorderStyle value, int expectedInvalidatedCallCount)
{
using Panel 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.BorderStyle = value;
Assert.Equal(value, control.BorderStyle);
Assert.True(control.IsHandleCreated);
Assert.Equal(expectedInvalidatedCallCount, invalidatedCallCount);
Assert.Equal(expectedInvalidatedCallCount, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Set same.
control.BorderStyle = value;
Assert.Equal(value, control.BorderStyle);
Assert.True(control.IsHandleCreated);
Assert.Equal(expectedInvalidatedCallCount, invalidatedCallCount);
Assert.Equal(expectedInvalidatedCallCount, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsTheory]
[InvalidEnumData<BorderStyle>]
public void Panel_BorderStyle_SetInvalid_ThrowsInvalidEnumArgumentException(BorderStyle value)
{
using Panel control = new();
Assert.Throws<InvalidEnumArgumentException>("value", () => control.BorderStyle = value);
}
[WinFormsFact]
public void Panel_PreferredSize_GetWithChildrenSimple_ReturnsExpected()
{
using Panel control = new();
using Control child = new()
{
Size = new Size(16, 20)
};
control.Controls.Add(child);
Assert.Equal(new Size(19, 23), control.PreferredSize);
}
[WinFormsFact]
public void Panel_PreferredSize_GetWithChildrenAdvanced_ReturnsExpected()
{
using BorderedPanel control = new()
{
Padding = new Padding(1, 2, 3, 4)
};
using Control child = new()
{
Size = new Size(16, 20)
};
control.Controls.Add(child);
Assert.Equal(new Size(26, 31), control.PreferredSize);
}
private class BorderedPanel : Panel
{
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.Style |= (int)WINDOW_STYLE.WS_BORDER;
cp.ExStyle |= (int)WINDOW_EX_STYLE.WS_EX_STATICEDGE;
return cp;
}
}
public new Size SizeFromClientSize(Size clientSize) => base.SizeFromClientSize(clientSize);
}
[WinFormsTheory]
[BoolData]
public void Panel_TabStop_Set_GetReturnsExpected(bool value)
{
using Panel control = new()
{
TabStop = value
};
Assert.Equal(value, control.TabStop);
Assert.False(control.IsHandleCreated);
// Set same.
control.TabStop = value;
Assert.Equal(value, control.TabStop);
Assert.False(control.IsHandleCreated);
// Set different.
control.TabStop = value;
Assert.Equal(value, control.TabStop);
Assert.False(control.IsHandleCreated);
}
[WinFormsTheory]
[BoolData]
public void Panel_TabStop_SetWithHandle_GetReturnsExpected(bool value)
{
using Panel 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.TabStop = value;
Assert.Equal(value, control.TabStop);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Set same.
control.TabStop = value;
Assert.Equal(value, control.TabStop);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Set different.
control.TabStop = value;
Assert.Equal(value, control.TabStop);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsFact]
public void Panel_TabStop_SetWithHandler_CallsTabStopChanged()
{
using Panel control = new()
{
TabStop = true
};
int callCount = 0;
EventHandler handler = (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(EventArgs.Empty, e);
callCount++;
};
control.TabStopChanged += handler;
// Set different.
control.TabStop = false;
Assert.False(control.TabStop);
Assert.Equal(1, callCount);
// Set same.
control.TabStop = false;
Assert.False(control.TabStop);
Assert.Equal(1, callCount);
// Set different.
control.TabStop = true;
Assert.True(control.TabStop);
Assert.Equal(2, callCount);
// Remove handler.
control.TabStopChanged -= handler;
control.TabStop = false;
Assert.False(control.TabStop);
Assert.Equal(2, callCount);
}
[WinFormsTheory]
[NormalizedStringData]
public void Panel_Text_Set_GetReturnsExpected(string value, string expected)
{
using Panel control = new()
{
Text = value
};
Assert.Equal(expected, control.Text);
Assert.False(control.IsHandleCreated);
// Set same.
control.Text = value;
Assert.Equal(expected, control.Text);
Assert.False(control.IsHandleCreated);
}
[WinFormsTheory]
[NormalizedStringData]
public void Panel_Text_SetWithHandle_GetReturnsExpected(string value, string expected)
{
using Panel 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.Text = value;
Assert.Equal(expected, control.Text);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Set same.
control.Text = value;
Assert.Equal(expected, control.Text);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsFact]
public void Panel_Text_SetWithHandler_CallsTextChanged()
{
using Panel control = new();
int callCount = 0;
EventHandler handler = (sender, e) =>
{
Assert.Same(control, sender);
Assert.Equal(EventArgs.Empty, e);
callCount++;
};
control.TextChanged += handler;
// Set different.
control.Text = "text";
Assert.Equal("text", control.Text);
Assert.Equal(1, callCount);
// Set same.
control.Text = "text";
Assert.Equal("text", control.Text);
Assert.Equal(1, callCount);
// Set different.
control.Text = null;
Assert.Empty(control.Text);
Assert.Equal(2, callCount);
// Remove handler.
control.TextChanged -= handler;
control.Text = "text";
Assert.Equal("text", control.Text);
Assert.Equal(2, callCount);
}
[WinFormsFact]
public void Panel_GetAutoSizeMode_Invoke_ReturnsExpected()
{
using SubPanel control = new();
Assert.Equal(AutoSizeMode.GrowOnly, control.GetAutoSizeMode());
}
[WinFormsTheory]
[InlineData(0, true)]
[InlineData(SubPanel.ScrollStateAutoScrolling, false)]
[InlineData(SubPanel.ScrollStateFullDrag, false)]
[InlineData(SubPanel.ScrollStateHScrollVisible, false)]
[InlineData(SubPanel.ScrollStateUserHasScrolled, false)]
[InlineData(SubPanel.ScrollStateVScrollVisible, false)]
[InlineData(int.MaxValue, false)]
[InlineData((-1), false)]
public void Panel_GetScrollState_Invoke_ReturnsExpected(int bit, bool expected)
{
using SubPanel control = new();
Assert.Equal(expected, control.GetScrollState(bit));
}
[WinFormsTheory]
[InlineData(ControlStyles.ContainerControl, true)]
[InlineData(ControlStyles.UserPaint, true)]
[InlineData(ControlStyles.Opaque, false)]
[InlineData(ControlStyles.ResizeRedraw, false)]
[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, false)]
[InlineData(ControlStyles.CacheText, false)]
[InlineData(ControlStyles.EnableNotifyMessage, false)]
[InlineData(ControlStyles.DoubleBuffer, false)]
[InlineData(ControlStyles.OptimizedDoubleBuffer, false)]
[InlineData(ControlStyles.UseTextForAccessibility, true)]
[InlineData((ControlStyles)0, true)]
[InlineData((ControlStyles)int.MaxValue, false)]
[InlineData((ControlStyles)(-1), false)]
public void Panel_GetStyle_Invoke_ReturnsExpected(ControlStyles flag, bool expected)
{
using SubPanel control = new();
Assert.Equal(expected, control.GetStyle(flag));
// Call again to test caching.
Assert.Equal(expected, control.GetStyle(flag));
}
[WinFormsFact]
public void Panel_GetTopLevel_Invoke_ReturnsExpected()
{
using SubPanel control = new();
Assert.False(control.GetTopLevel());
}
[WinFormsTheory]
[CommonMemberData(typeof(CommonTestHelperEx), nameof(CommonTestHelperEx.GetKeyEventArgsTheoryData))]
public void Panel_OnKeyDown_Invoke_CallsKeyDown(KeyEventArgs eventArgs)
{
using SubPanel 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(1, callCount);
// Remove handler.
control.KeyDown -= handler;
control.OnKeyDown(eventArgs);
Assert.Equal(1, callCount);
}
[WinFormsTheory]
[CommonMemberData(typeof(CommonTestHelperEx), nameof(CommonTestHelperEx.GetKeyPressEventArgsTheoryData))]
public void Panel_OnKeyPress_Invoke_CallsKeyPress(KeyPressEventArgs eventArgs)
{
using SubPanel control = new();
int callCount = 0;
KeyPressEventHandler handler = (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(eventArgs, e);
callCount++;
};
// Call with handler.
control.KeyPress += handler;
control.OnKeyPress(eventArgs);
Assert.Equal(1, callCount);
// Remove handler.
control.KeyPress -= handler;
control.OnKeyPress(eventArgs);
Assert.Equal(1, callCount);
}
[WinFormsTheory]
[CommonMemberData(typeof(CommonTestHelperEx), nameof(CommonTestHelperEx.GetKeyEventArgsTheoryData))]
public void Panel_OnKeyUp_Invoke_CallsKeyUp(KeyEventArgs eventArgs)
{
using SubPanel control = new();
int callCount = 0;
KeyEventHandler handler = (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(eventArgs, e);
callCount++;
};
// Call with handler.
control.KeyUp += handler;
control.OnKeyUp(eventArgs);
Assert.Equal(1, callCount);
// Remove handler.
control.KeyUp -= handler;
control.OnKeyUp(eventArgs);
Assert.Equal(1, callCount);
}
[WinFormsTheory]
[NewAndDefaultData<EventArgs>]
public void Panel_OnResize_Invoke_CallsResize(EventArgs eventArgs)
{
using SubPanel control = new();
int callCount = 0;
EventHandler handler = (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(eventArgs, e);
callCount++;
};
int layoutCallCount = 0;
control.Layout += (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(control, e.AffectedControl);
Assert.Equal("Bounds", e.AffectedProperty);
layoutCallCount++;
};
// Call with handler.
control.Resize += handler;
control.OnResize(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(1, layoutCallCount);
Assert.False(control.IsHandleCreated);
// Remove handler.
control.Resize -= handler;
control.OnResize(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(2, layoutCallCount);
Assert.False(control.IsHandleCreated);
}
public static IEnumerable<object[]> OnResize_WithHandle_TestData()
{
yield return new object[] { true, null, 1 };
yield return new object[] { true, new EventArgs(), 1 };
yield return new object[] { false, null, 0 };
yield return new object[] { false, new EventArgs(), 0 };
}
[WinFormsTheory]
[MemberData(nameof(OnResize_WithHandle_TestData))]
public void Panel_OnResize_InvokeWithHandle_CallsResize(bool resizeRedraw, EventArgs eventArgs, int expectedInvalidatedCallCount)
{
using SubPanel control = new();
control.SetStyle(ControlStyles.ResizeRedraw, resizeRedraw);
int callCount = 0;
EventHandler handler = (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(eventArgs, e);
callCount++;
};
int layoutCallCount = 0;
control.Layout += (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(control, e.AffectedControl);
Assert.Equal("Bounds", e.AffectedProperty);
layoutCallCount++;
};
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++;
// Call with handler.
control.Resize += handler;
control.OnResize(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(1, layoutCallCount);
Assert.True(control.IsHandleCreated);
Assert.Equal(expectedInvalidatedCallCount, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Remove handler.
control.Resize -= handler;
control.OnResize(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(2, layoutCallCount);
Assert.True(control.IsHandleCreated);
Assert.Equal(expectedInvalidatedCallCount * 2, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
public static IEnumerable<object[]> OnResize_DesignMode_TestData()
{
yield return new object[] { true, BorderStyle.None, null, 2 };
yield return new object[] { true, BorderStyle.None, new EventArgs(), 2 };
yield return new object[] { true, BorderStyle.Fixed3D, null, 1 };
yield return new object[] { true, BorderStyle.Fixed3D, new EventArgs(), 1 };
yield return new object[] { true, BorderStyle.FixedSingle, null, 1 };
yield return new object[] { true, BorderStyle.FixedSingle, new EventArgs(), 1 };
yield return new object[] { false, BorderStyle.None, null, 1 };
yield return new object[] { false, BorderStyle.None, new EventArgs(), 1 };
yield return new object[] { false, BorderStyle.Fixed3D, null, 0 };
yield return new object[] { false, BorderStyle.Fixed3D, new EventArgs(), 0 };
yield return new object[] { false, BorderStyle.FixedSingle, null, 0 };
yield return new object[] { false, BorderStyle.FixedSingle, new EventArgs(), 0 };
}
[WinFormsTheory]
[MemberData(nameof(OnResize_DesignMode_TestData))]
public void Panel_OnResize_InvokeWithDesignMode_CallsResize(bool resizeRedraw, BorderStyle borderStyle, EventArgs eventArgs, int expectedInvalidatedCallCount)
{
Mock<ISite> mockSite = new(MockBehavior.Strict);
mockSite
.Setup(s => s.Container)
.Returns((IContainer)null);
mockSite
.Setup(s => s.DesignMode)
.Returns(true);
mockSite
.Setup(s => s.GetService(typeof(AmbientProperties)))
.Returns(null);
using SubPanel control = new()
{
Site = mockSite.Object,
BorderStyle = borderStyle
};
control.SetStyle(ControlStyles.ResizeRedraw, resizeRedraw);
Assert.NotEqual(IntPtr.Zero, control.Handle);
int callCount = 0;
EventHandler handler = (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(eventArgs, e);
callCount++;
};
int layoutCallCount = 0;
control.Layout += (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(control, e.AffectedControl);
Assert.Equal("Bounds", e.AffectedProperty);
layoutCallCount++;
};
int invalidatedCallCount = 0;
control.Invalidated += (sender, e) => invalidatedCallCount++;
int styleChangedCallCount = 0;
control.StyleChanged += (sender, e) => styleChangedCallCount++;
int createdCallCount = 0;
control.HandleCreated += (sender, e) => createdCallCount++;
// Call with handler.
control.Resize += handler;
control.OnResize(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(1, layoutCallCount);
Assert.True(control.IsHandleCreated);
Assert.Equal(expectedInvalidatedCallCount, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Remove handler.
control.Resize -= handler;
control.OnResize(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(2, layoutCallCount);
Assert.True(control.IsHandleCreated);
Assert.Equal(expectedInvalidatedCallCount * 2, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsFact]
public void Panel_ToString_Invoke_ReturnsExpected()
{
Panel panel = new() { BorderStyle = BorderStyle.Fixed3D };
Assert.Equal("System.Windows.Forms.Panel, BorderStyle: System.Windows.Forms.BorderStyle.Fixed3D", panel.ToString());
}
private class SubPanel : Panel
{
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 OnKeyDown(KeyEventArgs e) => base.OnKeyDown(e);
public new void OnKeyPress(KeyPressEventArgs e) => base.OnKeyPress(e);
public new void OnKeyUp(KeyEventArgs e) => base.OnKeyUp(e);
public new void OnResize(EventArgs e) => base.OnResize(e);
public new void SetStyle(ControlStyles flag, bool value) => base.SetStyle(flag, value);
}
}
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