private void btnConvert_Click(object sender, EventArgs e)
{
double valueFromTextBox;
try
{
if (String.IsNullOrEmpty(textBoxValue.Text))
{
throw new Exception("Field cannot be empty");
}
labelError.Text = "";
Double.TryParse(textBoxValue.Text, out valueFromTextBox);
_temperatureConverter.SetTemperature(Double.Parse(textBoxValue.Text));
if (comboBoxConvertFrom.SelectedItem == null || comboBoxConvertTo.SelectedItem == null)
{
throw new ArgumentNullException(null, "Pick a unit!");
}
labelResult.Text = Math.Round(_temperatureConverter.HandleConverter(
comboBoxConvertFrom.SelectedItem.ToString(), comboBoxConvertTo.SelectedItem.ToString()), 2).ToString();
}
catch (ArgumentNullException ex)
{
labelError.Text = ex.Message;
}
catch (Exception ex)
{
labelError.Text = ex.Message;
}
}
public void TestKelvinToFahrenheit()
{
var temperatureConverter = new TemperatureConverter();
temperatureConverter.SetTemperature(278.15);
Assert.AreEqual(41.0, temperatureConverter.KelvinToFahrenheit());
}
public void TestKelvinToCelcius()
{
var temperatureConverter = new TemperatureConverter();
temperatureConverter.SetTemperature(345.15);
Assert.AreEqual(72.0, temperatureConverter.KelvinToCelcius());
}
public void TestFahrenheitToKelvin()
{
var temperatureConverter = new TemperatureConverter();
temperatureConverter.SetTemperature(41.0);
Assert.AreEqual(278.15, temperatureConverter.FahrenheitToKelvin());
}
public void TestFahrenheitToCelcius()
{
var temperatureConverter = new TemperatureConverter();
temperatureConverter.SetTemperature(41.0);
Assert.AreEqual(5.0, temperatureConverter.FahrenheitToCelcius());
}
public void TestCelciusToKelvin()
{
var temperatureConverter = new TemperatureConverter();
temperatureConverter.SetTemperature(10.0);
Assert.AreEqual(283.15, temperatureConverter.CelciusToKelvin());
}
public void TestCelciusToFahrenheit()
{
var temperatureConverter = new TemperatureConverter();
temperatureConverter.SetTemperature(12.0);
Assert.AreEqual(53.6, temperatureConverter.CelciusToFahrenheit());
}
public FormTemperature()
{
InitializeComponent();
AddUnitsToComboBox(comboBoxConvertFrom);
AddUnitsToComboBox(comboBoxConvertTo);
_temperatureConverter = new TemperatureConverter();
_temperatureConverter.SetTemperature(0);
textBoxValue.Text = "0";
}