internal ImmutableBitArrayFixture InternalXor(ImmutableBitArrayFixture other)
        {
            var result = Xor(other);

            Assert.NotNull(result);
            return(new ImmutableBitArrayFixture(result));
        }
 private static ImmutableBitArrayFixture VerifyBitArray(ImmutableBitArrayFixture subject,
                                                        Action <ImmutableBitArrayFixture> verify = null)
 {
     verify = verify ?? (x => { });
     Assert.NotNull(subject);
     verify(subject);
     return(subject);
 }