public void ReadWriteMemory()
{
var vm = new My_VirtualMachine("wr", 10);
vm.RegisterCommand('w', b => { b.Memory[3] = 42; });
vm.RegisterCommand('r', b => { Assert.AreEqual(42, b.Memory[3]); });
vm.Run();
}
public void ChangeMemoryPointer()
{
var vm = new My_VirtualMachine("xy", 10);
vm.RegisterCommand('x', b => { b.MemoryPointer = b.MemoryPointer + 42; });
vm.RegisterCommand('y', b => { Assert.AreEqual(42, b.MemoryPointer); });
vm.Run();
}
public void IncrementInstructionPointer()
{
var res = "";
var vm = new My_VirtualMachine("xy", 10);
vm.RegisterCommand('x', b => { res += "x->" + b.InstructionPointer + ", "; });
vm.RegisterCommand('y', b => { res += "y->" + b.InstructionPointer; });
vm.Run();
Assert.AreEqual("x->0, y->1", res);
}
public void MoveInstructionPointerForward()
{
var res = "";
var vm = new My_VirtualMachine("xyz", 10);
vm.RegisterCommand('x', b => { b.InstructionPointer++; });
vm.RegisterCommand('y', b => { Assert.Fail(); });
vm.RegisterCommand('z', b => { res += "z"; });
vm.Run();
Assert.AreEqual("z", res);
}
public void InstructionPointerCanMovedOutside()
{
var res = "";
var vm = new My_VirtualMachine("yxz", 10);
vm.RegisterCommand('x', b => { res += "x"; });
vm.RegisterCommand('y', b => { Assert.Fail(); });
vm.RegisterCommand('z', b => { res += "z"; });
vm.InstructionPointer++;
vm.Run();
Assert.AreEqual("xz", res);
}
public void RunInstructionsInRightOrder()
{
var vm = new My_VirtualMachine("abbaaa", 10);
var res = "";
vm.RegisterCommand('a', b => { res += "a"; });
vm.RegisterCommand('b', b => { res += "b"; });
if (res != "")
{
Assert.Fail("Instructions should not be executed before Run() call");
}
vm.Run();
if (res != "")
{
Assert.AreEqual("abbaaa", res, "Execution order of program 'abbaaa'");
}
}
public void MoveInstructionPointerBackward()
{
var res = "";
var vm = new My_VirtualMachine(">><", 10);
vm.RegisterCommand('>', b =>
{
b.InstructionPointer++;
res += ">";
});
vm.RegisterCommand('<', b =>
{
b.InstructionPointer -= 2;
res += "<";
});
vm.Run();
Assert.AreEqual("><>", res);
}
public void RunManyInstructions()
{
var vm = new My_VirtualMachine(new string('a', 10000), 10);
var count = 0;
vm.RegisterCommand('a', b => { count++; });
vm.Run();
Assert.AreEqual(10000, count, "Number of executed instructions");
}
public void Initialize()
{
var vm = new My_VirtualMachine("xxx", 12345);
vm.RegisterCommand('x', b => { });
Assert.AreEqual(12345, vm.Memory.Length);
Assert.AreEqual(0, vm.MemoryPointer);
Assert.AreEqual("xxx", vm.Instructions);
Assert.AreEqual(0, vm.InstructionPointer);
}