public unsafe void TryWriteUInt64LittleEndian_FailureCases(int spanLength, int offset)
{
// fabricate a span of the correct length - we can't deref it because it'll AV
Span <byte> span = new Span <byte>((byte *)null, spanLength);
Assert.False(SpanUtility.TryWriteUInt64LittleEndian(span, offset, 0xdeadbeef_deadbeef));
}
public void TryWriteUInt64LittleEndian_SuccessCases()
{
Span <byte> span = stackalloc byte[10] {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09
};
Assert.True(SpanUtility.TryWriteUInt64LittleEndian(span, 0, 0x10203040_50607080));
Assert.Equal(new byte[] { 0x80, 0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x08, 0x09 }, span.ToArray());
Assert.True(SpanUtility.TryWriteUInt64LittleEndian(span, 1, 0x1a2a3a4a_5a6a7a8a));
Assert.Equal(new byte[] { 0x80, 0x8a, 0x7a, 0x6a, 0x5a, 0x4a, 0x3a, 0x2a, 0x1a, 0x09 }, span.ToArray());
Assert.True(SpanUtility.TryWriteUInt64LittleEndian(span, 2, 0x1f2f3f4f_5f6f7f8f));
Assert.Equal(new byte[] { 0x80, 0x8a, 0x8f, 0x7f, 0x6f, 0x5f, 0x4f, 0x3f, 0x2f, 0x1f }, span.ToArray());
}
}
