144 lines
4.0 KiB
C#
144 lines
4.0 KiB
C#
using Chip8.Core;
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using Xunit;
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namespace Chip8.Tests;
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public class SuperChipTests
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{
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[Fact]
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public void hiresToggleSwitchesResolution()
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{
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var machine = TestHarness.withOpcode(0x00FF, Platform.SuperChip);
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Assert.False(machine.hires);
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machine.step();
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Assert.True(machine.hires);
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Assert.Equal(Video.hiWidth, machine.video.width);
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Assert.Equal(Video.hiHeight, machine.video.height);
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}
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[Fact]
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public void loresToggleReturnsToSmallResolution()
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{
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var machine = TestHarness.withProgram(Platform.SuperChip, 0x00FF, 0x00FE);
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machine.step();
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machine.step();
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Assert.False(machine.hires);
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Assert.Equal(Video.loWidth, machine.video.width);
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}
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[Fact]
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public void exitHaltsInterpreter()
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{
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var machine = TestHarness.withOpcode(0x00FD, Platform.SuperChip);
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machine.step();
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Assert.True(machine.exited);
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Assert.Equal(0x200, machine.pc);
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}
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[Fact]
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public void bigSpriteDrawsSixteenBySixteenBlock()
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{
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var machine = TestHarness.withProgram(Platform.SuperChip, 0x00FF, 0xD010);
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machine.i = 0x300;
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for (int offset = 0; offset < 32; offset++)
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{
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machine.memory[0x300 + offset] = 0xFF;
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}
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machine.v[0] = 0;
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machine.v[1] = 0;
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machine.step();
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machine.step();
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Assert.Equal(256, AsciiScreen.litPixelCount(machine.video));
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Assert.Equal(0, machine.v[0xF]);
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}
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[Fact]
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public void bigSpriteReportsCollisionOnOverlap()
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{
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var machine = TestHarness.withProgram(Platform.SuperChip, 0xD010, 0xD010);
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machine.i = 0x300;
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for (int offset = 0; offset < 32; offset++)
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{
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machine.memory[0x300 + offset] = 0xFF;
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}
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machine.step();
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Assert.Equal(0, machine.v[0xF]);
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machine.step();
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Assert.Equal(1, machine.v[0xF]);
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Assert.Equal(0, AsciiScreen.litPixelCount(machine.video));
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}
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[Fact]
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public void rplFlagsPersistAcrossStoreAndLoad()
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{
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var machine = TestHarness.withProgram(Platform.SuperChip, 0xF375, 0xF385);
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machine.v[0] = 0x11;
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machine.v[1] = 0x22;
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machine.v[2] = 0x33;
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machine.v[3] = 0x44;
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machine.step();
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machine.v[0] = 0;
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machine.v[1] = 0;
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machine.v[2] = 0;
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machine.v[3] = 0;
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machine.step();
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Assert.Equal(0x11, machine.v[0]);
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Assert.Equal(0x22, machine.v[1]);
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Assert.Equal(0x33, machine.v[2]);
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Assert.Equal(0x44, machine.v[3]);
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}
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[Fact]
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public void bigFontPointsAtTenByteGlyph()
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{
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var machine = TestHarness.withOpcode(0xF030, Platform.SuperChip);
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machine.v[0] = 0x3;
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machine.step();
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Assert.Equal(0xA0 + 0x3 * FontSet.bigGlyphBytes, machine.i);
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Assert.Equal(FontSet.bigGlyphs[0x3 * FontSet.bigGlyphBytes], machine.memory[machine.i]);
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}
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[Fact]
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public void scrollDownOpcodeMovesContent()
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{
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var machine = TestHarness.withProgram(Platform.SuperChip, 0x00C4);
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machine.memory[0x300] = 0x80;
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machine.video.drawSprite(machine.memory, 0x300, 5, 2, 1, 1, false);
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Assert.True(machine.video.pixel(0, 5, 2));
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machine.step();
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Assert.False(machine.video.pixel(0, 5, 2));
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Assert.True(machine.video.pixel(0, 5, 6));
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}
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[Fact]
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public void scrollRightOpcodeMovesContentFourPixels()
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{
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var machine = TestHarness.withProgram(Platform.SuperChip, 0x00FB);
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machine.memory[0x300] = 0x80;
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machine.video.drawSprite(machine.memory, 0x300, 5, 2, 1, 1, false);
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machine.step();
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Assert.False(machine.video.pixel(0, 5, 2));
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Assert.True(machine.video.pixel(0, 9, 2));
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}
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[Fact]
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public void scrollingRomRendersMenuUnderSuperChip()
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{
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var machine = TestHarness.runRomExtended("8-scrolling.ch8", 1000, Platform.SuperChip);
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Assert.False(machine.exited);
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Assert.False(machine.hires);
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Assert.Equal(254, AsciiScreen.litPixelCount(machine.video));
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}
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}
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