public void CheckedListBox_OnDrawItem_InvokeWithHandle_Success(Font font, Rectangle rect, int index, DrawItemState state, Color foreColor, Color backColor)
{
using var control = new SubCheckedListBox();
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 var image = new Bitmap(10, 10);
using Graphics graphics = Graphics.FromImage(image);
var e = new DrawItemEventArgs(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);
}
public void CheckedListBox_OnDrawItem_LargeEIndexEmpty_Success()
{
using var control = new SubCheckedListBox();
using var image = new Bitmap(10, 10);
using Graphics graphics = Graphics.FromImage(image);
var e = new DrawItemEventArgs(graphics, null, new Rectangle(1, 2, 3, 4), 1, DrawItemState.Default);
control.OnDrawItem(e);
Assert.True(control.IsHandleCreated);
}
public void CheckedListBox_OnDrawItem_Invoke_Success(Font font, Rectangle rect, int index, DrawItemState state, Color foreColor, Color backColor)
{
using var control = new SubCheckedListBox();
control.Items.Add("item1");
control.Items.Add("item2");
using var image = new Bitmap(10, 10);
using Graphics graphics = Graphics.FromImage(image);
var e = new DrawItemEventArgs(graphics, font, rect, index, state, foreColor, backColor);
control.OnDrawItem(e);
Assert.False(control.IsHandleCreated);
}
public void CheckedListBox_OnDrawItem_NullE_ThrowsNullReferenceException()
{
using var control = new SubCheckedListBox();
Assert.Throws <NullReferenceException>(() => control.OnDrawItem(null));
}