public void ConvertBack_WithNonDoubleValueType_ReturnsNull(object value)
{
// Setup
var converter = new NaNToEmptyValueConverter();
// Call
object result = converter.ConvertBack(value, typeof(double), null, null);
// Assert
Assert.That(result, Is.Null);
}
public void ConvertBack_WithDoubleValueType_ReturnsExpectedResult(string value, double expectedResult)
{
// Setup
var converter = new NaNToEmptyValueConverter();
// Call
object result = converter.ConvertBack(value, typeof(double), null, null);
// Assert
Assert.That(result, Is.EqualTo(expectedResult).Within(1e-5));
}
public void ConvertBack_WithUnsupportedType_ThrowsNotSupportedException()
{
// Setup
var converter = new NaNToEmptyValueConverter();
Type unsupportedType = typeof(object);
// Call
TestDelegate call = () => converter.ConvertBack("1", unsupportedType, null, null);
// Assert
string expectedMessage = $"Conversion to {unsupportedType.Name} is not supported.";
Assert.That(call, Throws.Exception.InstanceOf <NotSupportedException>()
.And.Message.EqualTo(expectedMessage));
}