public void ByteViewer_OnPaint_InvokeWithHandle_CallsPaint()
{
using var image = new Bitmap(10, 10);
using Graphics graphics = Graphics.FromImage(image);
var eventArgs = new PaintEventArgs(graphics, Rectangle.Empty);
using var control = new SubByteViewer();
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 void ByteViewer_OnPaint_InvokeWithBytesWithHandle_CallsPaint(byte[] bytes, DisplayMode displayMode)
{
using var image = new Bitmap(10, 10);
using Graphics graphics = Graphics.FromImage(image);
var eventArgs = new PaintEventArgs(graphics, Rectangle.Empty);
using var control = new SubByteViewer();
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);
}
public void ByteViewer_OnPaint_NullE_ThrowsNullReferenceException()
{
using var control = new SubByteViewer();
Assert.Throws <NullReferenceException>(() => control.OnPaint(null));
}