[GEMINI] Add tests for base32, binary, url, rot13, and reversed decoders

tests/test_decoding.py

@@ -40,4 +40,64 @@ def test_try_decode_metadata_non_decodable():
     # Hex: \x01\x02\x03\x04
     res_binary = try_decode_metadata("01020304")
     assert not res_binary
+# {{{ test_try_decode_metadata_base32
+def test_try_decode_metadata_base32():
+    """
+    Verifies that try_decode_metadata successfully decodes standard base32 string payloads.
+    """
+    # Base32 encoding of "flag{b32_metadata}"
+    b32_str = "MZXW6YTBMJWGS4TZENWGS4TBNQ======"
+    res = try_decode_metadata(b32_str)
+    assert res.get("base32") == "flag{b32_metadata}"
+# }}}
+
+# {{{ test_try_decode_metadata_binary
+def test_try_decode_metadata_binary():
+    """
+    Verifies that try_decode_metadata successfully decodes binary strings.
+    """
+    # Binary encoding of "flag{bin}"
+    bin_str = "011001100110110001100001011001110111101101100010011010010110111001111101"
+    res = try_decode_metadata(bin_str)
+    assert res.get("binary") == "flag{bin}"
+# }}}
+
+# {{{ test_try_decode_metadata_url
+def test_try_decode_metadata_url():
+    """
+    Verifies that try_decode_metadata successfully decodes percent/URL encoded payloads.
+    """
+    url_str = "%66%6c%61%67%7b%75%72%6c%7d"
+    res = try_decode_metadata(url_str)
+    assert res.get("url") == "flag{url}"
+# }}}
+
+# {{{ test_try_decode_metadata_rot13_only_flags
+def test_try_decode_metadata_rot13_only_flags():
+    """
+    Verifies that rot13 decodes flags but ignores standard text noise.
+    """
+    # ROT13 of "flag{rot13}" -> "synt{ebg13}"
+    rot_str = "synt{ebg13}"
+    res = try_decode_metadata(rot_str)
+    assert res.get("rot13") == "flag{rot13}"
+
+    # ROT13 of "normal text" -> "abezny grkg"
+    res_noise = try_decode_metadata("abezny grkg")
+    assert "rot13" not in res_noise
+# }}}
+
+# {{{ test_try_decode_metadata_reversed_only_flags
+def test_try_decode_metadata_reversed_only_flags():
+    """
+    Verifies that reversed decodes flags but ignores standard text noise.
+    """
+    # Reversed of "flag{rev}" -> "}ver{galf"
+    rev_str = "}ver{galf"
+    res = try_decode_metadata(rev_str)
+    assert res.get("reversed") == "flag{rev}"
+
+    # Reversed of "normal text" -> "txet lamron"
+    res_noise = try_decode_metadata("txet lamron")
+    assert "reversed" not in res_noise
 # }}}