kbe
855595837f
Add IAssembler seam (Assemble(text, origin)) with StubAssembler default backend. StubAssembler provides EmitU8/EmitU32/EmitU64 little-endian byte emitters (zero dep, no FASM). Assemble throws NotSupportedException on StubAssembler (text assembly deferred to IcedAssembler, Phase 8). 7 new tests: EmitU8, EmitU32 x2, EmitU64 x2, IS-A check, Assemble throws. All passing (total: 64).
79 lines
2.3 KiB
C#
79 lines
2.3 KiB
C#
using WhiteMagic.Assembly;
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namespace WhiteMagicTest;
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/// <summary>
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/// Tests for <see cref="StubAssembler"/> emit primitives (<see cref="StubAssembler.EmitU8"/>,
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/// <see cref="StubAssembler.EmitU32"/>, <see cref="StubAssembler.EmitU64"/>) and the
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/// <see cref="IAssembler"/> interface contract.
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/// </summary>
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public class StubAssemblerTests
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{
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private static StubAssembler Create() => new();
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// ── Emit primitives ────────────────────────────────────────────────────
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[Fact]
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public void EmitU8_appends_a_single_byte()
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{
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var sut = Create();
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var buffer = new List<byte>();
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sut.EmitU8(buffer, 0xAB);
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Assert.Equal([0xAB], buffer);
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}
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[Fact]
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public void EmitU32_appends_little_endian()
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{
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var sut = Create();
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var buffer = new List<byte>();
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sut.EmitU32(buffer, 0x11223344);
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Assert.Equal([0x44, 0x33, 0x22, 0x11], buffer);
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}
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[Fact]
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public void EmitU32_appends_zero()
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{
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var sut = Create();
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var buffer = new List<byte>();
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sut.EmitU32(buffer, 0);
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Assert.Equal([0x00, 0x00, 0x00, 0x00], buffer);
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}
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[Fact]
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public void EmitU64_appends_little_endian()
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{
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var sut = Create();
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var buffer = new List<byte>();
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sut.EmitU64(buffer, 0x1122334455667788);
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byte[] expected = [0x88, 0x77, 0x66, 0x55, 0x44, 0x33, 0x22, 0x11];
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Assert.Equal(expected, buffer);
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}
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[Fact]
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public void EmitU64_appends_high_bits()
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{
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var sut = Create();
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var buffer = new List<byte>();
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sut.EmitU64(buffer, 0xDEADBEEF_CAFEBABE);
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byte[] expected = [0xBE, 0xBA, 0xFE, 0xCA, 0xEF, 0xBE, 0xAD, 0xDE];
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Assert.Equal(expected, buffer);
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}
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// ── IAssembler interface ───────────────────────────────────────────────
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[Fact]
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public void StubAssembler_is_an_IAssembler()
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{
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var sut = Create();
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Assert.IsAssignableFrom<IAssembler>(sut);
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}
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[Fact]
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public void Assemble_from_StubAssembler_throws_NotSupported()
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{
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var sut = Create();
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Assert.Throws<NotSupportedException>(() => sut.Assemble("nop", 0));
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}
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}
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