public void ReadThrowsIfWouldGoOutOfBounds()
{
var ram = CreateFixedMemory(10);
var mem = new MirroredMemory(50, ram);
var buf = new byte[5];
Assert.Throws <IndexOutOfRangeException>(() => mem.Read(49, buf));
}
public void ReadThrowsIfOffsetIsNegative()
{
var mem = new MirroredMemory(10, new FixedMemory(10));
var buf = new byte[5];
var ex = Assert.Throws <ArgumentOutOfRangeException>(() => mem.Read(-1, buf));
Assert.Equal("offset", ex.ParamName);
}
public void ReadMirrorsAsManyTimesAsNecessaryToFillRead()
{
var ram = CreateFixedMemory(5);
var mem = new MirroredMemory(15, ram);
var buf = new byte[10];
mem.Read(3, buf);
Assert.Equal(
new byte[] { 4, 5, 1, 2, 3, 4, 5, 1, 2, 3 },
buf);
}