public void TrafficLight()
{
TrafficLight light = new TrafficLight(new RedColour());
light.Change();
Assert.AreEqual(light.Colour, new YellowToGreen().Colour);
light.Change();
Assert.AreEqual(light.Colour, new GreenColour().Colour);
light.Change();
Assert.AreEqual(light.Colour, new YellowToRed().Colour);
light.Change();
Assert.AreEqual(light.Colour, new RedColour().Colour);
}
public void TestState()
{
var trafficLight = new TrafficLight {
State = new RedLight()
};
trafficLight.ReportState();
for (var i = 0; i < 8; i++)
{
trafficLight.Change();
trafficLight.ReportState();
}
// OUTPUT: Red light.
// OUTPUT: Red and yellow light.
// OUTPUT: Green light.
// OUTPUT: Yellow light.
// OUTPUT: Red light.
// OUTPUT: Red and yellow light.
// OUTPUT: Green light.
// OUTPUT: Yellow light.
// OUTPUT: Red light.
}
public void WhenColorIsRedMustChangeToGreen()
{
TrafficLight.Color expectedColor = TrafficLight.Color.Green;
TrafficLight.Color actualColor;
TrafficLight trafficLight = new TrafficLight();
trafficLight.Change();
actualColor = trafficLight.CurrentColor;
Assert.Equal(expectedColor, actualColor);
}
public void WhenColorIsYellowMustChangeToRed()
{
TrafficLight.Color expectedColor = TrafficLight.Color.Red;
TrafficLight.Color actualColor;
TrafficLight trafficLight = new TrafficLight();
trafficLight.CurrentColor = TrafficLight.Color.Yellow;
trafficLight.Change();
actualColor = trafficLight.CurrentColor;
Assert.Equal(expectedColor, actualColor);
}