public void verify_method_ConvertBack_returns_correct_value()
{
var dtsConverter = new DoubleToStringConverter();
Assert.That(dtsConverter.ConvertBack(
s1, // string to convert (double)
typeof(String),
null, // no parameters
System.Globalization.CultureInfo.CurrentCulture).Equals(d1));
Assert.That(dtsConverter.ConvertBack(
s2, // string to convert (int)
typeof(String),
null, // no parameters
System.Globalization.CultureInfo.CurrentCulture).Equals((double)i1));
Assert.That(dtsConverter.ConvertBack(
"t", // string to convert (NaN)
typeof(String),
null, // no parameters
System.Globalization.CultureInfo.CurrentCulture).Equals(0));
var exception = Assert.Throws <ArgumentException>(() => dtsConverter.ConvertBack(
12, // int value
typeof(String),
null, // no parameters
System.Globalization.CultureInfo.CurrentCulture));
Assert.That(exception.Message, Is.EqualTo(StringLookup.GetLocalizedString("Exception_String")));
}
public void ConvertBack_NumberString_AppropriateDoubleNumber()
{
//arrange
double expected = 36.457;
//action
double actual = (double)Target.ConvertBack("36.457", typeof(Double), null, CultureInfo.InvariantCulture);
//assert
Assert.AreEqual(expected, actual);
}
public void ConvertBack_NumericString_ReturnsNumber()
{
var converter = new DoubleToStringConverter();
var result = converter.ConvertBack("3,14", null, null, null);
Assert.AreEqual(3.14, result);
}
public void ConvertBack_NonNumericString_ReturnsZero()
{
var converter = new DoubleToStringConverter();
var result = converter.ConvertBack("hello", null, null, null);
Assert.AreEqual(0, result);
}
public void ShouldReturnUnsetValueIfConvertingBackNull()
{
var result = _converter.ConvertBack(null, typeof(string), null, CultureInfo.InvariantCulture);
Assert.AreEqual(DependencyProperty.UnsetValue, result);
}