public void execute_step_at_instruction_pointer_address()
{
var instruction = new Mock <IInstruction>();
var instructions = new [] { instruction.Object };
var computer = new MockComputerBuilder()
.WithDefaultRegisterValue(Computer.InstructionPointer, 0)
.WithInstructions(instructions)
.Build();
computer.ExecuteStep();
instruction.Verify(i => i.Execute(computer), Times.Once);
}
public void advance_instruction_pointer_after_execute_step()
{
var instruction = new Mock <IInstruction>();
var instructions = new[] { instruction.Object };
var computer = new MockComputerBuilder()
.WithDefaultRegisterValue(Computer.InstructionPointer, 0)
.WithInstructions(instructions)
.Build();
var currentInstructionPointer = computer[Computer.InstructionPointer];
computer.ExecuteStep();
Assert.AreEqual(currentInstructionPointer + 1, computer[Computer.InstructionPointer]);
}
public void stop_execution_when_all_executed()
{
var instruction = new Mock <IInstruction>();
var instructions = new[] { instruction.Object };
var computer = new MockComputerBuilder()
.WithDefaultRegisterValue(Computer.InstructionPointer, 0)
.WithInstructions(instructions)
.Build();
computer.ExecuteAll();
computer.ExecuteStep();
instruction.Verify(i => i.Execute(computer), Times.Once);
}