# tests/test_decoding.py
from ctf.decoding import try_decode_metadata

# {{{ test_try_decode_metadata_hex
def test_try_decode_metadata_hex():
    """
    Verifies that try_decode_metadata successfully decodes standard hex string payloads.
    """
    # Hex encoding of "picoCTF{hex_flag_hint}"
    hex_str = "7069636f4354467b6865785f666c61675f68696e747d"
    res = try_decode_metadata(hex_str)
    assert res.get("hex") == "picoCTF{hex_flag_hint}"
# }}}

# {{{ test_try_decode_metadata_base64
def test_try_decode_metadata_base64():
    """
    Verifies that try_decode_metadata successfully decodes standard base64 string payloads.
    """
    # Base64 encoding of "flag{b64_metadata}"
    b64_str = "ZmxhZ3tiNjRfbWV0YWRhdGF9"
    res = try_decode_metadata(b64_str)
    assert res.get("base64") == "flag{b64_metadata}"
# }}}

# {{{ test_try_decode_metadata_non_decodable
def test_try_decode_metadata_non_decodable():
    """
    Verifies that try_decode_metadata returns empty results for invalid or non-printable payloads.
    """
    # Invalid characters
    res_invalid = try_decode_metadata("invalid!characters")
    assert not res_invalid

    # Not even length for hex, not modulo 4 for base64
    res_odd = try_decode_metadata("1")
    assert not res_odd

    # Non-printable decoded content (binary raw data)
    # Hex: \x01\x02\x03\x04
    res_binary = try_decode_metadata("01020304")
    assert not res_binary
# }}}