public void should_declare_out_if_generic_type_is_covariant()
{
var covariantDemoObject = new CovariantContravariantDemoClass<string>("Hello");
ICovariantGetDemo<object> covariantWithBaseTypeArgument = covariantDemoObject;
object value = covariantWithBaseTypeArgument.Get();
// correct the variable value to fix the test
object expectedValue = null;
Assert.Equal(expectedValue, value);
}
public void should_declare_out_if_generic_type_is_covariant()
{
var covariantDemoObject = new CovariantContravariantDemoClass <string>("Hello");
ICovariantGetDemo <object> covariantWithBaseTypeArgument = covariantDemoObject;
object value = covariantWithBaseTypeArgument.Get();
// correct the variable value to fix the test
object expectedValue = null;
Assert.Equal(expectedValue, value);
}
public void should_declare_in_if_generic_type_is_contravariant()
{
var contravariantDemoObject = new CovariantContravariantDemoClass<object>(null);
IContravariantSetDemo<string> contravariantWithDerivedTypeArgument =
contravariantDemoObject;
contravariantWithDerivedTypeArgument.Put("Hello");
// correct the variable value to fix the test
object expectedValue = null;
Assert.Equal(expectedValue, contravariantDemoObject.Get());
}
public void should_declare_in_if_generic_type_is_contravariant()
{
var contravariantDemoObject = new CovariantContravariantDemoClass <object>(null);
IContravariantSetDemo <string> contravariantWithDerivedTypeArgument =
contravariantDemoObject;
contravariantWithDerivedTypeArgument.Put("Hello");
// correct the variable value to fix the test
object expectedValue = null;
Assert.Equal(expectedValue, contravariantDemoObject.Get());
}
