public void should_return_empty_sequence_when_empty_sequence_is_given()
{
var emptySequence = new List <int>();
var selector = new EvenNumbersSelector();
Assert.IsEmpty(selector.Select(emptySequence));
}
public void should_return_empty_sequence_when_there_are_no_even_numbers()
{
var oddSequence = new List <int>()
{
3, 5, 355, 321, 45
};
var selector = new EvenNumbersSelector();
Assert.IsEmpty(selector.Select(oddSequence));
}
public void should_return_all_even_numbers_from_sequence()
{
var testSequence = new List <int>()
{
1, 2, 3, 6, 4, 15, 23
};
var correctResultSequence = new List <int>()
{
2, 6, 4
};
var selector = new EvenNumbersSelector();
CollectionAssert.AreEqual(correctResultSequence, selector.Select(testSequence));
}