public void TemperatureConverterTest()
{
var converterCache = new ValueConverterCache<TemperatureUnit>((k) => new TemperatureConverter(k.From, k.To));
Assert.AreEqual(32, converterCache.Get(TemperatureUnit.Celsius, TemperatureUnit.Fahrenheit).Convert(0));
Assert.AreEqual(33.8, converterCache.Get(TemperatureUnit.Celsius, TemperatureUnit.Fahrenheit).Convert(1));
Assert.AreEqual(89.6, converterCache.Get(TemperatureUnit.Celsius, TemperatureUnit.Fahrenheit).Convert(32));
Assert.AreEqual(212, converterCache.Get(TemperatureUnit.Celsius, TemperatureUnit.Fahrenheit).Convert(100));
Assert.AreEqual(-17.7777778, converterCache.Get(TemperatureUnit.Fahrenheit, TemperatureUnit.Celsius).Convert(0), 0.00000005);
Assert.AreEqual(0, converterCache.Get(TemperatureUnit.Fahrenheit, TemperatureUnit.Celsius).Convert(32), 0.0000000001);
Assert.AreEqual(1, converterCache.Get(TemperatureUnit.Fahrenheit, TemperatureUnit.Celsius).Convert(33.8), 0.0000000001);
Assert.AreEqual(32, converterCache.Get(TemperatureUnit.Fahrenheit, TemperatureUnit.Celsius).Convert(89.6), 0.0000000001);
Assert.AreEqual(100, converterCache.Get(TemperatureUnit.Fahrenheit, TemperatureUnit.Celsius).Convert(212), 0.0000000001);
}
public void TemperatureConverterTest()
{
var converterCache = new ValueConverterCache <TemperatureUnit>((k) => new TemperatureConverter(k.From, k.To));
Assert.AreEqual(32, converterCache.Get(TemperatureUnit.Celsius, TemperatureUnit.Fahrenheit).Convert(0));
Assert.AreEqual(33.8, converterCache.Get(TemperatureUnit.Celsius, TemperatureUnit.Fahrenheit).Convert(1));
Assert.AreEqual(89.6, converterCache.Get(TemperatureUnit.Celsius, TemperatureUnit.Fahrenheit).Convert(32));
Assert.AreEqual(212, converterCache.Get(TemperatureUnit.Celsius, TemperatureUnit.Fahrenheit).Convert(100));
Assert.AreEqual(-17.7777778, converterCache.Get(TemperatureUnit.Fahrenheit, TemperatureUnit.Celsius).Convert(0), 0.00000005);
Assert.AreEqual(0, converterCache.Get(TemperatureUnit.Fahrenheit, TemperatureUnit.Celsius).Convert(32), 0.0000000001);
Assert.AreEqual(1, converterCache.Get(TemperatureUnit.Fahrenheit, TemperatureUnit.Celsius).Convert(33.8), 0.0000000001);
Assert.AreEqual(32, converterCache.Get(TemperatureUnit.Fahrenheit, TemperatureUnit.Celsius).Convert(89.6), 0.0000000001);
Assert.AreEqual(100, converterCache.Get(TemperatureUnit.Fahrenheit, TemperatureUnit.Celsius).Convert(212), 0.0000000001);
}
public override object ProvideValue(IServiceProvider serviceProvider)
{
if (serviceProvider == null)
{
throw new ArgumentNullException(nameof(serviceProvider));
}
var target = serviceProvider.GetService <IProvideValueTarget>() ??
throw new InvalidOperationException("There is no ProvideValueTarget service in the service provider.");
var targetProperty = target.TargetProperty;
Type propertyType;
if (targetProperty is PropertyInfo property)
{
propertyType = property.PropertyType;
}
else if (targetProperty is DependencyProperty dependencyProperty)
{
propertyType = dependencyProperty.PropertyType;
}
else
{
throw new InvalidOperationException("Cannot obtain the property type.");
}
if (propertyType.IsAssignableTo <IValueConverter>())
{
return(ValueConverterCache.GetValueConverter(Type));
}
if (propertyType.IsAssignableTo <IMultiValueConverter>())
{
return(ValueConverterCache.GetMultiValueConverter(Type));
}
throw new InvalidOperationException("The type of property must implement a value converter interface.");
}
