add reason to to cause test result?

[He-Pin]

    {
      "name": "double quotes, embedded U+0001",
      "selector": "$[\"\u0001\"]",
      "invalid_selector": true
    }

eg: why this is an invalid selector. which would be very helpful. a test kit should point to the spec rules.

[gregsdennis]

It's invalid because \u0001 must be JSON-encoded.

These cases are a bit confusing to read because they're also embedded in JSON, which means the string must be double-encoded.

After decoding the test, the actual path ends up being $["☺"] where ☺ is ASCII char 0x01. JSON (and by extension JSON Path) requires that this character and others be escaped.

The requirement is in the ABNF in §2.3.1.1: unescaped defines the characters which may be found unescaped in a string.

[He-Pin]

thanks, I find the root cause is jackson decoded it to ☺ and I have no chance to match my rule, not it fixed.