void RemoveRange_works(int index, int count, InstructionList list, Instruction[] expected)
{
list.RemoveRange(index, count);
Assert.Equal(expected.Length, list.Count);
Assert.True(expected.Length <= list.Capacity);
var listElems = new Instruction[list.Count];
list.CopyTo(listElems);
AssertEqual(expected, listElems);
}
void RemoveRange_throws_if_invalid_input()
{
var instructions = GetInstructions();
InstructionList list;
list = new InstructionList(Array.Empty <Instruction>());
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(-1), GetValue(0)));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(0), GetValue(1)));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(1), GetValue(0)));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(-1), GetValue(1)));
list = new InstructionList(instructions);
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(-1), 0));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(1), GetValue(list.Count)));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(0), GetValue(list.Count + 1)));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(int.MinValue), GetValue(0)));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(0), GetValue(int.MaxValue)));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(int.MaxValue), GetValue(int.MaxValue)));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveRange(GetValue(int.MinValue), GetValue(int.MaxValue)));
}