public void Ignores_NullInstances()
{
// Arrange
var declaredEnumerableOfT = typeof(IEnumerable <int>);
var wrapperProvider = new EnumerableWrapperProvider(
declaredEnumerableOfT,
elementWrapperProvider: null);
// Act
var wrapped = wrapperProvider.Wrap(null);
// Assert
Assert.Equal(typeof(DelegatingEnumerable <int, int>), wrapperProvider.WrappingType);
Assert.Null(wrapped);
}
public void Wraps_EmptyCollections()
{
// Arrange
var declaredEnumerableOfT = typeof(IEnumerable <int>);
var wrapperProvider = new EnumerableWrapperProvider(
declaredEnumerableOfT,
elementWrapperProvider: null);
// Act
var wrapped = wrapperProvider.Wrap(new int[] { });
// Assert
Assert.Equal(typeof(DelegatingEnumerable <int, int>), wrapperProvider.WrappingType);
Assert.NotNull(wrapped);
var delegatingEnumerable = wrapped as DelegatingEnumerable <int, int>;
Assert.NotNull(delegatingEnumerable);
Assert.Empty(delegatingEnumerable);
}