public void PcReadFromBus()
{
byte expectedValue = 0xF0;
var clock = new Mock <IClock>();
clock.Setup(x => x.AddConnectedComponent(It.IsAny <IClockConnectedComponent>()));
var bus = new Mock <IBus>();
bus.SetupGet(x => x.Value).Returns(expectedValue);
var controlUnit = new Mock <IControlUnit>();
ControlLine countEnableLine = new ControlLine(ControlLineId.PC_ENABLE);
controlUnit.Setup(x => x.GetControlLine(ControlLineId.PC_ENABLE)).Returns(countEnableLine);
ControlLine busOutputLine = new ControlLine(ControlLineId.PC_OUT);
controlUnit.Setup(x => x.GetControlLine(ControlLineId.PC_OUT)).Returns(busOutputLine);
ControlLine busInputLine = new ControlLine(ControlLineId.PC_IN);
controlUnit.Setup(x => x.GetControlLine(ControlLineId.PC_IN)).Returns(busInputLine);
busInputLine.State = true;
var pc = new ProgramCounter(clock.Object, bus.Object, controlUnit.Object);
pc.OnRisingEdge();
Assert.Equal(expectedValue, pc.Value);
}
public void PcShouldNotAdvance()
{
var clock = new Mock <IClock>();
clock.Setup(x => x.AddConnectedComponent(It.IsAny <IClockConnectedComponent>()));
var bus = new Mock <IBus>();
var controlUnit = new Mock <IControlUnit>();
ControlLine countEnableLine = new ControlLine(ControlLineId.PC_ENABLE);
controlUnit.Setup(x => x.GetControlLine(ControlLineId.PC_ENABLE)).Returns(countEnableLine);
ControlLine busOutputLine = new ControlLine(ControlLineId.PC_OUT);
controlUnit.Setup(x => x.GetControlLine(ControlLineId.PC_OUT)).Returns(busOutputLine);
ControlLine busInputLine = new ControlLine(ControlLineId.PC_IN);
controlUnit.Setup(x => x.GetControlLine(ControlLineId.PC_IN)).Returns(busInputLine);
var pc = new ProgramCounter(clock.Object, bus.Object, controlUnit.Object);
byte v1 = pc.Value;
pc.OnRisingEdge();
byte v2 = pc.Value;
Assert.Equal(v1, v2);
}