public void Heater_WhenStopped_HasFallingPressure()
{
int previousPressure = 0;
for (int i = 0; i < 10; i++)
{
FireTimersWithPeriod(1000u, 1000);
BoilerDataType model = GetBoilerModel();
int pressure = model.Pressure;
pressure.Should().BeGreaterThan(previousPressure, "pressure should build when heater is on");
previousPressure = pressure;
}
TurnHeaterOff();
for (int i = 0; i < 5; i++)
{
FireTimersWithPeriod(1000u, 1000);
BoilerDataType model = GetBoilerModel();
int pressure = model.Pressure;
pressure.Should().BeLessThan(previousPressure, "pressure should drop when heater is off");
previousPressure = pressure;
}
}
public void Heater_WhenRunning_HasRisingPressure()
{
int previousPressure = 0;
for (int i = 0; i < 5; i++)
{
FireTimersWithPeriod(1000u, 1000);
BoilerDataType model = GetBoilerModel();
int pressure = model.Pressure;
pressure.Should().BeGreaterThan(previousPressure, "pressure should build when heater is on");
previousPressure = pressure;
}
}
public void Heater_AtStartUp_IsTurnedOn()
{
FireTimersWithPeriod(1000u, 1000);
BoilerDataType model = GetBoilerModel();
BoilerHeaterStateType state = model.HeaterState;
BoilerTemperatureType temperature = model.Temperature;
int pressure = model.Pressure;
state.Should().Be(BoilerHeaterStateType.On, "heater should start in 'on' state");
pressure.Should().BeGreaterThan(10_000, "pressure should start at 10k and get higher");
temperature.Top.Should().Be(pressure - 100_005, "top is always 100,005 less than pressure. Pressure: {0}", pressure);
temperature.Bottom.Should().Be(pressure - 100_000, "bottom is always 100,000 less than pressure. Pressure: {0}", pressure);
}
public void Heater_CanBeTurnedOff()
{
// let heater run for a few seconds to make temperature rise
FireTimersWithPeriod(1000u, 1000);
TurnHeaterOff();
FireTimersWithPeriod(1000u, 1000);
BoilerDataType model = GetBoilerModel();
BoilerHeaterStateType state = model.HeaterState;
BoilerTemperatureType temperature = model.Temperature;
int pressure = model.Pressure;
state.Should().Be(BoilerHeaterStateType.Off, "heater should have been turned off");
pressure.Should().BeGreaterThan(10_000, "pressure should start at 10k and get higher");
temperature.Top.Should().Be(pressure - 100_005, "top is always 100,005 less than pressure. Pressure: {0}", pressure);
temperature.Bottom.Should().Be(pressure - 100_000, "btoom is always 100,000 less than pressure. Pressure: {0}", pressure);
}
