#[cfg(test)]
#[cfg(feature = "alloc")]
mod tests {

    use base64easy::*;

    fn compare_encode(expected: &str, target: &[u8]) {
        assert_eq!(expected, encode(target, EngineKind::Standard));
    }

    #[test]
    fn encode_all_ascii() {
        let ascii: Vec<u8> = (0..=127).collect();

        compare_encode(
            "AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4OTo7P\
             D0+P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fn8\
             =",
            &ascii,
        );
    }

    #[test]
    fn encode_all_bytes() {
        let bytes: Vec<u8> = (0..=255).collect();

        compare_encode(
            "AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4OTo7P\
             D0+P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fn\
             +AgYKDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmqq6ytrq+wsbKztLW2t7i5uru8vb6\
             /wMHCw8TFxsfIycrLzM3Oz9DR0tPU1dbX2Nna29zd3t/g4eLj5OXm5+jp6uvs7e7v8PHy8/T19vf4+fr7/P3+/w==",
            &bytes,
        );
    }

    #[test]
    fn encode_all_bytes_url() {
        let bytes: Vec<u8> = (0..=255).collect();

        assert_eq!(
            "AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4OTo7PD0\
             -P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fn\
             -AgYKDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmqq6ytrq\
             -wsbKztLW2t7i5uru8vb6_wMHCw8TFxsfIycrLzM3Oz9DR0tPU1dbX2Nna29zd3t_g4eLj5OXm5-jp6uvs7e7v8PHy\
             8_T19vf4-fr7_P3-_w==",
            encode(&bytes, EngineKind::UrlSafe),
        );
    }
}

#[cfg(test)]
mod tests2 {
    use base64easy::*;

    #[test]
    fn encoded_len_unpadded() {
        assert_eq!(0, encoded_len(0, false).unwrap());
        assert_eq!(2, encoded_len(1, false).unwrap());
        assert_eq!(3, encoded_len(2, false).unwrap());
        assert_eq!(4, encoded_len(3, false).unwrap());
        assert_eq!(6, encoded_len(4, false).unwrap());
        assert_eq!(7, encoded_len(5, false).unwrap());
        assert_eq!(8, encoded_len(6, false).unwrap());
        assert_eq!(10, encoded_len(7, false).unwrap());
    }

    #[test]
    fn encoded_len_padded() {
        assert_eq!(0, encoded_len(0, true).unwrap());
        assert_eq!(4, encoded_len(1, true).unwrap());
        assert_eq!(4, encoded_len(2, true).unwrap());
        assert_eq!(4, encoded_len(3, true).unwrap());
        assert_eq!(8, encoded_len(4, true).unwrap());
        assert_eq!(8, encoded_len(5, true).unwrap());
        assert_eq!(8, encoded_len(6, true).unwrap());
        assert_eq!(12, encoded_len(7, true).unwrap());
    }

    #[test]
    fn encoded_len_overflow() {
        let max_size = usize::MAX / 4 * 3 + 2;
        assert_eq!(2, max_size % 3);
        assert_eq!(Some(usize::MAX), encoded_len(max_size, false));
        assert_eq!(None, encoded_len(max_size + 1, false));
    }
}
