public void ConstructorShouldOpenPort()
{
var serialPort = new MockSerialPort();
var powerSupply = new PowerSupply(serialPort);
Assert.That(serialPort.IsOpen);
}
public void WritesVoltageValueCorrectToSerialPort()
{
var serialPort = new MockSerialPort();
var powerSupply = new PowerSupply(serialPort);
powerSupply.SetVoltage(13.7);
Assert.That(serialPort.LastWrittenLine, Is.EqualTo("SV137"));
}
public void WhenPowerSupplyReturnAnErrorAnErrorNumberExcaptionIsThrown()
{
const string ErrorReturnValue = "1";
var serialPort = new MockSerialPort()
{
ReadLineData = ErrorReturnValue
};
var powerSupply = new PowerSupply(serialPort);
Assert.Throws <ErrorNumberException>(() => powerSupply.SetVoltage(13.4));
}