private static void TestWithEvens(int[] ints, IEnumerable <int> expectation)
 {
     int[] sequence = new EvenFilter().GetValues(ints);
     sequence.ShouldAllBeEquivalentTo(expectation);
 }
 private static void TestWithEvens(int[] ints, IEnumerable<int> expectation)
 {
     int[] sequence = new EvenFilter().GetValues(ints);
     sequence.ShouldAllBeEquivalentTo(expectation);
 }