public void should_be_return_type_covariance()
{
var demoObject = new DelegateTypeVarianceDemoClass();
Func <object> delegateReturnsObject = demoObject.ReturnsMoreSpecificType;
object returnedValue = delegateReturnsObject();
// change variable value to fix test.
object expectedValue = "Hello";
Assert.Equal(expectedValue, returnedValue);
}
public void should_be_parameter_contravariance()
{
var demoObject = new DelegateTypeVarianceDemoClass();
Func <object, string> delegateAcceptsObject = demoObject.InputMoreGeneralType;
Func <string, string> delegateAcceptsString = delegateAcceptsObject;
string returnedValue = delegateAcceptsString("Good");
// change variable value to fix test.
const string expectedValue = "Good";
Assert.Equal(expectedValue, returnedValue);
}