public void ContextualHandler_Throws_InvalidCastException_If_No_Result_Assigned()
{
// Arrange
ValueExtractor extractor = ValueExtractor.Create(config =>
{
config.UseHandler <string>(
(obj, ctx) =>
{
});
});
// Act
TestDelegate test = () => extractor.Extract <string>("");
// Assert
Assert.That(test, Throws.TypeOf <InvalidCastException>());
}