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LlamaCasty/ytLive.Tests/ScoreboardRendererTests.cs
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gramps fbcccea0f7 feat(scoreboard): unit 4 — the strip renderer (plate, text colour, fit, wrap)
Rasterises enabled tiles into one straight-alpha BGRA frame: measured widths -> FitLine (shrink,
then wrap, never scroll) -> centred lines with dim separators, over an optional rounded plate whose
colour and opacity are the creator's knobs. Uses OutputPalette.Sans (bundled Inter) because on-stream
text wears the app's typefaces.

Static by design: it takes plain strings, so the caller caches the frame and only re-rasterises when
a value changes — a strip that re-rendered every tick would be the compositor's most expensive layer
for no benefit.

Guard: ScoreboardRendererTests paints real frames and inspects pixels — plate colour AND opacity,
text colour reaching glyphs, plate-off leaves the area transparent, and an empty tile set returns no
frame at all.
2026-10-30 14:37:34 -07:00

68 lines
2.9 KiB
C#

using System;
using System.Collections.Generic;
using System.Threading;
using Xunit;
using ytLive.Services;
using ytLive.Services.Compositor;
namespace ytLive.Tests;
/// <summary>The strip is state, not events: everything enabled is always on screen. These checks
/// paint the real frame, because a renderer that silently draws nothing would still pass a
/// structural test.</summary>
public class ScoreboardRendererTests
{
private static readonly List<string> Tiles = new() { "Members 12", "Milestones 3", "SC $47.00" };
[Fact]
public void The_strip_paints_the_plate_and_the_text_and_never_needs_a_scroll()
{
Exception? failure = null;
var thread = new Thread(() =>
{
try
{
// Plate on: half-transparent blue behind white text.
var plated = ScoreboardRenderer.Render(Tiles, new ScoreboardStyle("#FFFFFF", true, "#0000FF", 0.5));
Assert.NotNull(plated);
Assert.Equal(ScoreboardRenderer.Width, plated!.Width);
Assert.True(plated.Height > 0);
Assert.True(Count(plated, (r, g, b, a) => b > 150 && r < 60 && g < 60 && a is > 100 and < 170) > 500,
"the plate must fill at the chosen colour and opacity");
Assert.True(Count(plated, (r, g, b, a) => r > 200 && g > 200 && b > 200 && a > 200) > 20,
"the text must be painted in the chosen colour");
// Plate off: the same area is transparent, the text survives.
var bare = ScoreboardRenderer.Render(Tiles, new ScoreboardStyle("#FFFFFF", false, "#0000FF", 0.5));
Assert.NotNull(bare);
Assert.Equal(0, Count(bare!, (r, g, b, a) => b > 150 && r < 60 && g < 60 && a > 100));
Assert.True(Count(bare!, (r, g, b, a) => r > 200 && g > 200 && b > 200 && a > 200) > 20);
// Text colour reaches the glyphs.
var red = ScoreboardRenderer.Render(Tiles, new ScoreboardStyle("#FF0000", false, "#000000", 0.5));
Assert.True(Count(red!, (r, g, b, a) => r > 180 && g < 80 && b < 80 && a > 200) > 20);
// Nothing enabled: no frame at all (the layer draws nothing).
Assert.Null(ScoreboardRenderer.Render(Array.Empty<string>(), new ScoreboardStyle()));
}
catch (Exception ex) { failure = ex; }
});
thread.SetApartmentState(ApartmentState.STA);
thread.Start();
thread.Join();
Assert.Null(failure);
}
private static int Count(VideoFrame frame, Func<int, int, int, int, bool> predicate)
{
var hits = 0;
for (var i = 0; i < frame.BgraPixels.Length; i += 4)
if (predicate(frame.BgraPixels[i + 2], frame.BgraPixels[i + 1], frame.BgraPixels[i], frame.BgraPixels[i + 3]))
hits++;
return hits;
}
}