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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.TestUtilities;
namespace System.Windows.Forms.Tests;
public class CheckedListBoxTests
{
[WinFormsFact]
public void CheckedListBox_Constructor()
{
using CheckedListBox box = new();
Assert.NotNull(box);
// Check default values
box.UseCompatibleTextRendering.Should().BeTrue();
}
[WinFormsTheory]
[BoolData]
public void CheckedListBox_CheckOnClick(bool expected)
{
using CheckedListBox box = new()
{
CheckOnClick = expected
};
Assert.Equal(expected, box.CheckOnClick);
}
[WinFormsFact]
public void CheckedListBox_CheckedIndexCollectionNotNull()
{
using CheckedListBox box = new();
CheckedListBox.CheckedIndexCollection collection = box.CheckedIndices;
Assert.NotNull(collection);
}
[WinFormsFact]
public void CheckedListBox_CheckedItemCollectionNotNull()
{
using CheckedListBox box = new();
CheckedListBox.CheckedItemCollection collection = box.CheckedItems;
Assert.NotNull(collection);
}
[WinFormsTheory]
[StringData]
public void CheckedListBox_DisplayMember(string expected)
{
using CheckedListBox box = new()
{
DisplayMember = expected
};
Assert.Equal(expected, box.DisplayMember);
}
[WinFormsFact]
public void CheckedListBox_DrawModeReturnsNormalOnly()
{
using CheckedListBox box = new();
DrawMode result = box.DrawMode;
Assert.Equal(DrawMode.Normal, result);
}
[WinFormsFact]
public void CheckedListBox_DrawMode_GetSet_ReturnsExpected()
{
using CheckedListBox box = new();
box.DrawMode.Should().Be(DrawMode.Normal);
box.DrawMode = DrawMode.OwnerDrawFixed;
box.DrawMode.Should().Be(DrawMode.Normal);
box.DrawMode = DrawMode.OwnerDrawVariable;
box.DrawMode.Should().Be(DrawMode.Normal);
}
[WinFormsTheory]
[InlineData(SelectionMode.None)]
[InlineData(SelectionMode.One)]
public void CheckedListBox_SelectionModeGetSet(SelectionMode expected)
{
using CheckedListBox box = new()
{
SelectionMode = expected
};
Assert.Equal(expected, box.SelectionMode);
}
[WinFormsTheory]
[InlineData(SelectionMode.MultiSimple)]
[InlineData(SelectionMode.MultiExtended)]
public void CheckedListBox_SelectionModeGetSetInvalidFromEnum(SelectionMode expected)
{
using CheckedListBox box = new();
ArgumentException ex = Assert.Throws<ArgumentException>(() => box.SelectionMode = expected);
}
[WinFormsTheory]
[InvalidEnumData<SelectionMode>]
public void CheckedListBox_SelectionMode_SetInvalidValue_ThrowsInvalidEnumArgumentException(SelectionMode value)
{
using CheckedListBox control = new();
Assert.Throws<InvalidEnumArgumentException>("value", () => control.SelectionMode = value);
}
[WinFormsTheory]
[BoolData]
public void CheckedListBox_ThreeDCheckBoxes(bool expected)
{
using CheckedListBox box = new()
{
ThreeDCheckBoxes = expected
};
Assert.Equal(expected, box.ThreeDCheckBoxes);
}
[WinFormsTheory]
[BoolData]
public void CheckedListBox_ThreeDCheckBoxes_SetWithItems_ReturnsExpected(bool expected)
{
using CheckedListBox box = new()
{
ThreeDCheckBoxes = expected
};
box.Items.Add("item1");
box.ThreeDCheckBoxes.Should().Be(expected);
}
[WinFormsTheory]
[StringData]
public void CheckedListBox_ValueMember(string expected)
{
using CheckedListBox box = new()
{
ValueMember = expected
};
Assert.Equal(expected, box.ValueMember);
}
[WinFormsTheory]
[CommonMemberData(typeof(CommonTestHelperEx), nameof(CommonTestHelperEx.GetPaddingNormalizedTheoryData))]
public void CheckedListBox_Padding_Set_GetReturnsExpected(Padding value, Padding expected)
{
using CheckedListBox control = new()
{
Padding = value
};
Assert.Equal(expected, control.Padding);
Assert.False(control.IsHandleCreated);
// Set same.
control.Padding = value;
Assert.Equal(expected, control.Padding);
Assert.False(control.IsHandleCreated);
}
public static IEnumerable<object[]> Padding_SetWithHandle_TestData()
{
yield return new object[] { new Padding(), new Padding(), 0, 0 };
yield return new object[] { new Padding(1, 2, 3, 4), new Padding(1, 2, 3, 4), 1, 1 };
yield return new object[] { new Padding(1), new Padding(1), 1, 1 };
yield return new object[] { new Padding(-1, -2, -3, -4), Padding.Empty, 1, 2 };
}
[WinFormsTheory]
[MemberData(nameof(Padding_SetWithHandle_TestData))]
public void CheckedListBox_Padding_SetWithHandle_GetReturnsExpected(Padding value, Padding expected, int expectedInvalidatedCallCount1, int expectedInvalidatedCallCount2)
{
using CheckedListBox 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.Padding = value;
Assert.Equal(expected, control.Padding);
Assert.True(control.IsHandleCreated);
Assert.Equal(expectedInvalidatedCallCount1, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Set same.
control.Padding = value;
Assert.Equal(expected, control.Padding);
Assert.True(control.IsHandleCreated);
Assert.Equal(expectedInvalidatedCallCount2, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsFact]
public void CheckedListBox_Padding_SetWithHandler_CallsPaddingChanged()
{
using CheckedListBox control = new();
int callCount = 0;
EventHandler handler = (sender, e) =>
{
Assert.Equal(control, sender);
Assert.Equal(EventArgs.Empty, e);
callCount++;
};
control.PaddingChanged += handler;
// Set different.
Padding padding1 = new(1);
control.Padding = padding1;
Assert.Equal(padding1, control.Padding);
Assert.Equal(1, callCount);
// Set same.
control.Padding = padding1;
Assert.Equal(padding1, control.Padding);
Assert.Equal(1, callCount);
// Set different.
Padding padding2 = new(2);
control.Padding = padding2;
Assert.Equal(padding2, control.Padding);
Assert.Equal(2, callCount);
// Remove handler.
control.PaddingChanged -= handler;
control.Padding = padding1;
Assert.Equal(padding1, control.Padding);
Assert.Equal(2, callCount);
}
[WinFormsTheory]
[InlineData(1)]
[InlineData(-1)]
[InlineData(int.MaxValue)]
public void CheckedListBox_GetItemCheckStateOutOfRange(int index)
{
using CheckedListBox box = new();
ArgumentOutOfRangeException ex = Assert.Throws<ArgumentOutOfRangeException>(() => box.GetItemCheckState(index));
Assert.Equal("index", ex.ParamName);
}
[WinFormsFact]
public void CheckedListBox_RefreshItems_InvokeEmpty_Success()
{
using SubCheckedListBox control = new();
control.RefreshItems();
Assert.Empty(control.Items);
Assert.False(control.IsHandleCreated);
// Call again.
control.RefreshItems();
Assert.Empty(control.Items);
Assert.False(control.IsHandleCreated);
}
[WinFormsFact]
public void CheckedListBox_RefreshItems_InvokeNotEmpty_Success()
{
using SubCheckedListBox control = new();
control.Items.Add("item1");
control.Items.Add("item2");
control.RefreshItems();
Assert.Equal(new object[] { "item1", "item2" }, control.Items.Cast<object>());
Assert.False(control.IsHandleCreated);
// Call again.
control.RefreshItems();
Assert.Equal(new object[] { "item1", "item2" }, control.Items.Cast<object>());
Assert.False(control.IsHandleCreated);
}
[WinFormsFact]
public void CheckedListBox_RefreshItems_InvokeEmptyWithHandle_Success()
{
using SubCheckedListBox 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.RefreshItems();
Assert.Empty(control.Items);
Assert.True(control.IsHandleCreated);
Assert.Equal(1, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Call again.
control.RefreshItems();
Assert.Empty(control.Items);
Assert.True(control.IsHandleCreated);
Assert.Equal(2, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsFact]
public void CheckedListBox_RefreshItems_InvokeNotEmptyWithHandle_Success()
{
using SubCheckedListBox control = new();
control.Items.Add("item1");
control.Items.Add("item2");
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.RefreshItems();
Assert.Equal(new object[] { "item1", "item2" }, control.Items.Cast<object>());
Assert.True(control.IsHandleCreated);
Assert.Equal(1, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Call again.
control.RefreshItems();
Assert.Equal(new object[] { "item1", "item2" }, control.Items.Cast<object>());
Assert.True(control.IsHandleCreated);
Assert.Equal(2, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsTheory]
[InlineData(1)]
[InlineData(-1)]
[InlineData(int.MaxValue)]
public void CheckedListBox_SetItemCheckStateOutOfRange(int index)
{
using CheckedListBox box = new();
ArgumentOutOfRangeException ex = Assert.Throws<ArgumentOutOfRangeException>(() => box.SetItemCheckState(index, CheckState.Checked));
Assert.Equal("index", ex.ParamName);
}
[WinFormsTheory]
[EnumData<CheckState>]
public void CheckedListBox_SetItemCheckState_Invoke_GetReturnsExpected(CheckState value)
{
using CheckedListBox control = new();
control.Items.Add(new CheckBox(), false);
control.SetItemCheckState(0, value);
Assert.Equal(value, control.GetItemCheckState(0));
Assert.False(control.IsHandleCreated);
// Set same.
control.SetItemCheckState(0, value);
Assert.Equal(value, control.GetItemCheckState(0));
Assert.False(control.IsHandleCreated);
}
[WinFormsTheory]
[InvalidEnumData<CheckState>]
public void CheckedListBox_SetItemCheckState_InvokeInvalidValue_ThrowsInvalidEnumArgumentException(CheckState value)
{
using CheckedListBox control = new();
control.Items.Add(new CheckBox(), false);
Assert.Throws<InvalidEnumArgumentException>("value", () => control.SetItemCheckState(0, value));
}
[WinFormsTheory]
[InlineData(true, CheckState.Checked)]
[InlineData(false, CheckState.Unchecked)]
public void CheckedListBox_SetItemChecked(bool send, CheckState expected)
{
using CheckedListBox box = new();
box.Items.Add(new CheckBox(), false);
box.SetItemChecked(0, send);
Assert.Equal(expected, box.GetItemCheckState(0));
}
public static IEnumerable<object[]> OnDrawItem_TestData()
{
yield return new object[] { null, Rectangle.Empty, 0, DrawItemState.Default, Color.Red, Color.Blue };
yield return new object[] { null, new Rectangle(1, 2, 3, 4), 1, DrawItemState.None, Color.Red, Color.Blue };
yield return new object[] { null, new Rectangle(1, 2, 3, 4), 1, DrawItemState.Checked, Color.Red, Color.Blue };
yield return new object[] { new Font("Arial", 8.25f), new Rectangle(10, 20, 30, 40), 1, DrawItemState.Default, Color.Red, Color.Blue };
}
[WinFormsTheory]
[MemberData(nameof(OnDrawItem_TestData))]
public void CheckedListBox_OnDrawItem_Invoke_Success(Font font, Rectangle rect, int index, DrawItemState state, Color foreColor, Color backColor)
{
using SubCheckedListBox control = new();
control.Items.Add("item1");
control.Items.Add("item2");
using Bitmap image = new(10, 10);
using Graphics graphics = Graphics.FromImage(image);
DrawItemEventArgs e = new(graphics, font, rect, index, state, foreColor, backColor);
control.OnDrawItem(e);
Assert.False(control.IsHandleCreated);
}
[WinFormsTheory]
[MemberData(nameof(OnDrawItem_TestData))]
public void CheckedListBox_OnDrawItem_InvokeWithHandle_Success(Font font, Rectangle rect, int index, DrawItemState state, Color foreColor, Color backColor)
{
using SubCheckedListBox control = new();
control.Items.Add("item1");
control.Items.Add("item2");
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++;
using Bitmap image = new(10, 10);
using Graphics graphics = Graphics.FromImage(image);
DrawItemEventArgs e = new(graphics, font, rect, index, state, foreColor, backColor);
control.OnDrawItem(e);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
[WinFormsFact]
public void CheckedListBox_OnDrawItem_NullE_ThrowsNullReferenceException()
{
using SubCheckedListBox control = new();
Assert.Throws<NullReferenceException>(() => control.OnDrawItem(null));
}
[WinFormsFact]
public void CheckedListBox_OnDrawItem_NegativeEIndex_Success()
{
using SubCheckedListBox control = new();
using Bitmap image = new(10, 10);
using Graphics graphics = Graphics.FromImage(image);
DrawItemEventArgs e = new(graphics, null, new Rectangle(1, 2, 3, 4), -1, DrawItemState.Default);
control.OnDrawItem(e);
Assert.False(control.IsHandleCreated);
}
[WinFormsFact]
public void CheckedListBox_OnDrawItem_LargeEIndexEmpty_Success()
{
using SubCheckedListBox control = new();
using Bitmap image = new(10, 10);
using Graphics graphics = Graphics.FromImage(image);
DrawItemEventArgs e = new(graphics, null, new Rectangle(1, 2, 3, 4), 1, DrawItemState.Default);
control.OnDrawItem(e);
Assert.True(control.IsHandleCreated);
}
[WinFormsFact]
public void CheckedListBox_OnDrawItem_LargeEIndexNotEmpty_Success()
{
using SubCheckedListBox control = new();
control.Items.Add("item1");
using Bitmap image = new(10, 10);
using Graphics graphics = Graphics.FromImage(image);
DrawItemEventArgs e = new(graphics, null, new Rectangle(1, 2, 3, 4), 2, DrawItemState.Default);
control.OnDrawItem(e);
Assert.True(control.IsHandleCreated);
}
[WinFormsTheory]
[InlineData(true)]
[InlineData(false)]
public void CheckedListBox_Remove_NotSelectedItems(bool createControl)
{
using CheckedListBox checkedListBox = new();
if (createControl)
{
checkedListBox.CreateControl();
}
checkedListBox.Items.AddRange((object[])["1", "2", "3"]);
checkedListBox.SelectedItem = checkedListBox.Items[0];
Assert.Equal(3, checkedListBox.Items.Count);
Assert.Equal(checkedListBox.Items[0], checkedListBox.SelectedItem);
Assert.Equal(0, checkedListBox.SelectedIndex);
Assert.Equal(1, checkedListBox.SelectedIndices.Count);
Assert.Equal(1, checkedListBox.SelectedItems.Count);
checkedListBox.Items.Remove(checkedListBox.Items[2]);
Assert.Equal(2, checkedListBox.Items.Count);
Assert.Equal(checkedListBox.Items[0], checkedListBox.SelectedItem);
Assert.Equal(0, checkedListBox.SelectedIndex);
Assert.Equal(1, checkedListBox.SelectedIndices.Count);
Assert.Equal(1, checkedListBox.SelectedItems.Count);
checkedListBox.Items.Remove(checkedListBox.Items[1]);
Assert.Equal(1, checkedListBox.Items.Count);
Assert.Equal(checkedListBox.Items[0], checkedListBox.SelectedItem);
Assert.Equal(0, checkedListBox.SelectedIndex);
Assert.Equal(1, checkedListBox.SelectedIndices.Count);
Assert.Equal(1, checkedListBox.SelectedItems.Count);
Assert.Equal(createControl, checkedListBox.IsHandleCreated);
}
[WinFormsTheory]
[InlineData(true)]
[InlineData(false)]
public void CheckedListBox_Remove_SelectedItem(bool createControl)
{
using CheckedListBox checkedListBox = new();
if (createControl)
{
checkedListBox.CreateControl();
}
checkedListBox.Items.AddRange((object[])["1", "2", "3"]);
for (int count = checkedListBox.Items.Count; count > 1; count -= 1)
{
checkedListBox.SelectedItem = checkedListBox.Items[0];
Assert.Equal(checkedListBox.Items[0], checkedListBox.SelectedItem);
Assert.Equal(0, checkedListBox.SelectedIndex);
Assert.Equal(1, checkedListBox.SelectedIndices.Count);
Assert.Equal(1, checkedListBox.SelectedItems.Count);
checkedListBox.Items.Remove(checkedListBox.Items[0]);
count -= 1;
Assert.Equal(count, checkedListBox.Items.Count);
Assert.Null(checkedListBox.SelectedItem);
Assert.Equal(-1, checkedListBox.SelectedIndex);
Assert.Equal(0, checkedListBox.SelectedIndices.Count);
Assert.Equal(0, checkedListBox.SelectedItems.Count);
}
}
[WinFormsTheory]
[InlineData(true)]
[InlineData(false)]
public void CheckedListBox_Remove_UncheckedItems(bool createControl)
{
using CheckedListBox checkedListBox = new();
if (createControl)
{
checkedListBox.CreateControl();
}
checkedListBox.Items.AddRange((object[])["1", "2", "3"]);
checkedListBox.SetItemChecked(0, true);
for (int count = checkedListBox.Items.Count; count > 1; count -= 1)
{
Assert.Equal(1, checkedListBox.CheckedIndices.Count);
Assert.Equal(1, checkedListBox.CheckedItems.Count);
checkedListBox.Items.Remove(checkedListBox.Items[2]);
count -= 1;
Assert.Equal(count, checkedListBox.Items.Count);
Assert.Equal(1, checkedListBox.CheckedIndices.Count);
Assert.Equal(1, checkedListBox.CheckedItems.Count);
}
}
[WinFormsTheory]
[InlineData(true)]
[InlineData(false)]
public void CheckedListBox_Remove_CheckedItems(bool createControl)
{
using CheckedListBox checkedListBox = new();
if (createControl)
{
checkedListBox.CreateControl();
}
checkedListBox.Items.AddRange((object[])["1", "2", "3"]);
for (int count = checkedListBox.Items.Count; count > 1; count -= 1)
{
checkedListBox.SetItemChecked(0, true);
Assert.Equal(1, checkedListBox.CheckedIndices.Count);
Assert.Equal(1, checkedListBox.CheckedItems.Count);
checkedListBox.Items.Remove(checkedListBox.Items[0]);
count -= 1;
Assert.Equal(count, checkedListBox.Items.Count);
Assert.Equal(0, checkedListBox.CheckedIndices.Count);
Assert.Equal(0, checkedListBox.CheckedItems.Count);
}
}
[WinFormsFact]
public void CheckedListBox_DataSource_GetSet_ReturnsExpected()
{
using CheckedListBox checkedListBox = new();
List<string> dataSource1 = ["item1", "item2", "item3"];
List<string> dataSource2 = ["item4", "item5", "item6"];
int callCount = 0;
checkedListBox.DataSourceChanged += (sender, e) => callCount++;
// Test initial DataSource set
checkedListBox.DataSource = dataSource1;
checkedListBox.DataSource.Should().BeEquivalentTo(dataSource1);
callCount.Should().Be(1);
// Test changing DataSource
checkedListBox.DataSource = dataSource2;
checkedListBox.DataSource.Should().BeEquivalentTo(dataSource2);
callCount.Should().Be(2);
// Test setting DataSource to null
checkedListBox.DataSource = null;
checkedListBox.DataSource.Should().BeNull();
callCount.Should().Be(3);
// Test setting DataSource to DataSource
checkedListBox.DataSource = dataSource2;
checkedListBox.DataSource.Should().BeEquivalentTo(dataSource2);
callCount.Should().Be(4);
}
[WinFormsFact]
public void CheckedListBox_ItemHeight_Get_ReturnsExpected()
{
using SubCheckedListBox checkedListBox = new();
int expectedHeight = checkedListBox.Font.Height + checkedListBox._listItemBordersHeight;
checkedListBox.ItemHeight.Should().Be(expectedHeight);
}
[WinFormsFact]
public void CheckedListBox_ItemHeight_Set_DoesNotChangeValue()
{
using CheckedListBox checkedListBox = new();
int originalHeight = checkedListBox.ItemHeight;
checkedListBox.ItemHeight = 50;
checkedListBox.ItemHeight.Should().Be(originalHeight);
checkedListBox.ItemHeight = -1;
checkedListBox.ItemHeight.Should().Be(originalHeight);
}
[WinFormsTheory]
[BoolData]
public void CheckedListBox_UseCompatibleTextRendering_GetSet_ReturnsExpected(bool value)
{
using CheckedListBox checkedListBox = new();
checkedListBox.UseCompatibleTextRendering = value;
checkedListBox.UseCompatibleTextRendering.Should().Be(value);
checkedListBox.UseCompatibleTextRenderingInternal.Should().Be(value);
}
[WinFormsFact]
public void CheckedListBox_DataSourceChanged_AddRemove_Success()
{
using SubCheckedListBox checkedListBox = new();
int callCount = 0;
EventHandler handler = (sender, e) =>
{
callCount++;
sender.Should().Be(checkedListBox);
e.Should().Be(EventArgs.Empty);
};
checkedListBox.DataSourceChanged += handler;
checkedListBox.OnDataSourceChanged(EventArgs.Empty);
callCount.Should().Be(1);
checkedListBox.DataSourceChanged -= handler;
checkedListBox.OnDataSourceChanged(EventArgs.Empty);
callCount.Should().Be(1);
}
[WinFormsFact]
public void CheckedListBox_DisplayMemberChanged_AddRemove_Success()
{
using SubCheckedListBox checkedListBox = new();
int callCount = 0;
EventHandler handler = (sender, e) =>
{
callCount++;
sender.Should().Be(checkedListBox);
e.Should().Be(EventArgs.Empty);
};
checkedListBox.DisplayMemberChanged += handler;
checkedListBox.OnDisplayMemberChanged(EventArgs.Empty);
callCount.Should().Be(1);
checkedListBox.DisplayMemberChanged -= handler;
checkedListBox.OnDisplayMemberChanged(EventArgs.Empty);
callCount.Should().Be(1);
}
[WinFormsFact]
public void CheckedListBox_ItemCheck_AddRemove_Success()
{
using SubCheckedListBox checkedListBox = new();
int callCount = 0;
ItemCheckEventHandler handler = (sender, e) =>
{
callCount++;
sender.Should().Be(checkedListBox);
e.Should().NotBeNull();
};
ItemCheckEventArgs eventArgs = new(0, CheckState.Checked, CheckState.Unchecked);
checkedListBox.ItemCheck += handler;
checkedListBox.OnItemCheck(eventArgs);
callCount.Should().Be(1);
checkedListBox.ItemCheck -= handler;
checkedListBox.OnItemCheck(eventArgs);
callCount.Should().Be(1);
}
[WinFormsFact]
public void CheckedListBox_Click_AddRemove_Success()
{
using SubCheckedListBox checkedListBox = new();
int callCount = 0;
EventHandler handler = (sender, e) =>
{
callCount++;
sender.Should().Be(checkedListBox);
e.Should().Be(EventArgs.Empty);
};
checkedListBox.Click += handler;
checkedListBox.OnClick(EventArgs.Empty);
callCount.Should().Be(1);
checkedListBox.Click -= handler;
checkedListBox.OnClick(EventArgs.Empty);
callCount.Should().Be(1);
}
[WinFormsFact]
public void CheckedListBox_MouseClick_AddRemove_Success()
{
using SubCheckedListBox checkedListBox = new();
int callCount = 0;
MouseEventHandler handler = (sender, e) =>
{
callCount++;
sender.Should().Be(checkedListBox);
e.Should().NotBeNull();
};
MouseEventArgs eventArgs = new(MouseButtons.Left, 1, 0, 0, 0);
checkedListBox.MouseClick += handler;
checkedListBox.OnMouseClick(eventArgs);
callCount.Should().Be(1);
checkedListBox.MouseClick -= handler;
checkedListBox.OnMouseClick(eventArgs);
callCount.Should().Be(1);
}
[WinFormsFact]
public void CheckedListBox_MeasureItem_AddRemove_Success()
{
using SubCheckedListBox checkedListBox = new();
int callCount = 0;
MeasureItemEventHandler handler = (sender, e) =>
{
callCount++;
sender.Should().Be(checkedListBox);
e.Should().NotBeNull();
};
using Bitmap image = new(10, 10);
MeasureItemEventArgs eventArgs = new(Graphics.FromImage(image), 1);
checkedListBox.MeasureItem += handler;
checkedListBox.OnMeasureItem(eventArgs);
callCount.Should().Be(1);
checkedListBox.MeasureItem -= handler;
checkedListBox.OnMeasureItem(eventArgs);
callCount.Should().Be(1);
}
[WinFormsFact]
public void CheckedListBox_ValueMemberChanged_AddRemove_Success()
{
using CheckedListBox checkedListBox = new();
int callCount = 0;
EventHandler handler = (sender, e) =>
{
callCount++;
sender.Should().Be(checkedListBox);
e.Should().Be(EventArgs.Empty);
};
checkedListBox.ValueMemberChanged += handler;
checkedListBox.ValueMember = "Value";
callCount.Should().Be(1);
checkedListBox.ValueMemberChanged -= handler;
checkedListBox.ValueMember = "NewValue";
callCount.Should().Be(1);
}
[WinFormsFact]
public void CheckedListBox_DrawItemEvent_AddRemove_Success()
{
using SubCheckedListBox checkedListBox = new();
DrawItemEventHandler handler = (sender, e) => { };
Action actAdd = () => checkedListBox.DrawItem += handler;
Action actRemove = () => checkedListBox.DrawItem -= handler;
actAdd.Should().NotThrow();
actRemove.Should().NotThrow();
}
private class SubCheckedListBox : CheckedListBox
{
public new int _listItemBordersHeight => base._listItemBordersHeight;
public new void RefreshItems() => base.RefreshItems();
public new void OnDrawItem(DrawItemEventArgs e) => base.OnDrawItem(e);
public new void OnDataSourceChanged(EventArgs e) => base.OnDataSourceChanged(e);
public new void OnDisplayMemberChanged(EventArgs e) => base.OnDisplayMemberChanged(e);
public new void OnItemCheck(ItemCheckEventArgs e) => base.OnItemCheck(e);
public new void OnClick(EventArgs e) => base.OnClick(e);
public new void OnMouseClick(MouseEventArgs e) => base.OnMouseClick(e);
public new void OnMeasureItem(MeasureItemEventArgs e) => base.OnMeasureItem(e);
}
}
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