92 lines
2.3 KiB
C#
92 lines
2.3 KiB
C#
using System;
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using Chip8.Core;
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using Xunit;
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namespace Chip8.Tests;
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public class PaletteTests
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{
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[Fact]
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public void hexParsesWithAndWithoutHash()
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{
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var withHash = Rgb.fromHex("#1A2B3C");
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var without = Rgb.fromHex("1A2B3C");
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Assert.Equal(withHash, without);
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Assert.Equal(0x1A, withHash.r);
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Assert.Equal(0x2B, withHash.g);
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Assert.Equal(0x3C, withHash.b);
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}
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[Fact]
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public void hexRoundTripsThroughToHex()
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{
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var color = new Rgb(0xFF, 0x80, 0x00);
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Assert.Equal("#FF8000", color.toHex());
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Assert.Equal(color, Rgb.fromHex(color.toHex()));
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}
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[Theory]
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[InlineData("12345")]
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[InlineData("#12")]
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[InlineData("XYZXYZ")]
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public void malformedHexThrows(string value)
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{
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Assert.Throws<FormatException>(() => Rgb.fromHex(value));
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}
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[Fact]
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public void monochromePaletteHasTwoColors()
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{
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var palette = Palette.monochrome();
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Assert.Equal(2, palette.colorCount);
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Assert.Equal(new Rgb(0, 0, 0), palette[0]);
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Assert.Equal(new Rgb(0xFF, 0xFF, 0xFF), palette[1]);
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}
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[Fact]
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public void octoPaletteHasFourColors()
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{
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var palette = Palette.octo();
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Assert.Equal(4, palette.colorCount);
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Assert.Equal(Rgb.fromHex("#996600"), palette[0]);
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Assert.Equal(Rgb.fromHex("#662200"), palette[3]);
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}
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[Fact]
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public void extendedPaletteHasSixteenColors()
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{
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Assert.Equal(16, Palette.extended16().colorCount);
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}
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[Fact]
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public void resolveWrapsIndexIntoRange()
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{
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var palette = Palette.grayscale();
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Assert.Equal(palette[0], palette.resolve(4));
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Assert.Equal(palette[1], palette.resolve(5));
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Assert.Equal(palette[0], palette.resolve(-1));
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}
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[Theory]
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[InlineData("mono")]
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[InlineData("grayscale")]
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[InlineData("octo")]
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[InlineData("extended16")]
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public void byNameResolvesKnownPalettes(string name)
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{
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Assert.True(Palette.byName(name).colorCount >= 2);
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}
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[Fact]
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public void byNameRejectsUnknownPalette()
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{
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Assert.Throws<ArgumentException>(() => Palette.byName("neon"));
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}
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[Fact]
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public void paletteRejectsSingleColor()
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{
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Assert.Throws<ArgumentException>(() => new Palette(new Rgb(0, 0, 0)));
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}
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}
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