public void AddOverlay_WhenOverlayIsNotNull_AddsTheOverlay()
{
var overlayManager = new OverlayManager();
var overlay = new StubOverlay();
overlayManager.AddOverlay(overlay);
Assert.AreElementsEqual(new[] { overlay }, overlayManager.Overlays);
}
public void AddOverlay_WhenOverlayIsNotNullAndIsPresent_RemovesTheOverlay()
{
var overlayManager = new OverlayManager();
var overlay = new StubOverlay();
overlayManager.AddOverlay(overlay);
overlayManager.RemoveOverlay(overlay);
Assert.Count(0, overlayManager.Overlays);
}
public void PaintOverlays_PaintsAllOverlaysAndRestoresGraphicsContextForEachOne()
{
var overlayManager = new OverlayManager();
var overlay1 = new OverlayThatChangesInterpolationMode();
var overlay2 = new OverlayThatChangesInterpolationMode();
overlayManager.AddOverlay(overlay1);
overlayManager.AddOverlay(overlay2);
using (Bitmap bitmap = new Bitmap(32, 32))
{
using (Graphics graphics = Graphics.FromImage(bitmap))
{
graphics.InterpolationMode = InterpolationMode.HighQualityBilinear;
var request = new OverlayPaintRequest(graphics, new Rectangle(0, 0, 32, 32), 0, 0);
overlayManager.PaintOverlays(request);
Assert.Multiple(() =>
{
Assert.AreEqual(InterpolationMode.HighQualityBilinear, graphics.InterpolationMode);
Assert.IsTrue(overlay1.WasPainted);
Assert.AreEqual(InterpolationMode.HighQualityBilinear, overlay1.OldInterpolationMode);
Assert.IsTrue(overlay2.WasPainted);
Assert.AreEqual(InterpolationMode.HighQualityBilinear, overlay2.OldInterpolationMode);
});
}
}
}
public void AddOverlay_WhenOverlayIsNull_Throws()
{
var overlayManager = new OverlayManager();
Assert.Throws<ArgumentNullException>(() => overlayManager.AddOverlay(null));
}
public void ToOverlay_ReturnsACompositeOverlay()
{
var overlayManager = new OverlayManager();
var overlay = new OverlayThatChangesInterpolationMode();
overlayManager.AddOverlay(overlay);
Overlay compositeOverlay = overlayManager.ToOverlay();
var compositeOverlayManager = new OverlayManager();
compositeOverlayManager.AddOverlay(compositeOverlay);
using (Bitmap bitmap = new Bitmap(32, 32))
compositeOverlayManager.PaintOverlaysOnImage(bitmap, 0, 0);
Assert.IsTrue(overlay.WasPainted);
}
public void Paint()
{
var overlayManager = new OverlayManager();
var overlay = new CaptionOverlay()
{
Text = "This is some text.",
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Bottom
};
overlayManager.AddOverlay(overlay);
using (Bitmap bitmap = CreateBitmapWithBackground())
{
overlayManager.PaintOverlaysOnImage(bitmap, 0, 0);
TestLog.WriteLine("Image should contain 'This is some text.' centered at the bottom.");
TestLog.EmbedImage("Image", bitmap);
}
}
