Results do not match other implementations

[cburgmer]

The following queries provide results that do not match those of other implementations of JSONPath
(compare https://cburgmer.github.io/json-path-comparison/):

• $[1:3]
  Input:

  {":": 42, "more": "string", "a": 1, "b": 2, "c": 3}
  

  Expected output:

  []
  

  Error:

  ** (Poison.EncodeError) unable to encode value: {"b", 2}
      lib/poison/encoder.ex:383: Poison.Encoder.Any.encode/2
      lib/poison/encoder.ex:259: anonymous fn/3 in Poison.Encoder.List.encode/3
      lib/poison/encoder.ex:260: Poison.Encoder.List."-encode/3-lists^foldr/2-1-"/3
      lib/poison/encoder.ex:260: Poison.Encoder.List.encode/3
      lib/poison.ex:41: Poison.encode!/2
      lib/jsonpath.ex:8: Mix.Tasks.Execute.run/1
  

• $[0:0]
  Input:

  ["first", "second"]
  

  Expected output:

  []
  

  Actual output:

  ["first", "second"]
  

• $[-4:]
  Input:

  ["first", "second", "third"]
  

  Expected output:

  ["first", "second", "third"]
  

  Actual output:

  []
  

• $..[0]
  Input:

  ["first", {"key": ["first nested", {"more": [{"nested": ["deepest", "second"]}, ["more", "values"]]}]}]
  

  Expected output (in any order as no consensus on ordering exists):

  ["deepest", "first nested", "first", "more", {"nested": ["deepest", "second"]}]
  

  Error:

  ** (MatchError) no match of right hand side value: {:error, %ExJSONPath.ParsingError{message: "syntax error before: '['"}}
      lib/jsonpath.ex:7: Mix.Tasks.Execute.run/1
  

• $[*]
  Input:

  ["string", 42, {"key": "value"}, [0, 1]]
  

  Expected output:

  ["string", 42, {"key": "value"}, [0, 1]]
  

  Error:

  ** (MatchError) no match of right hand side value: {:error, %ExJSONPath.ParsingError{message: "syntax error before: '*'"}}
      lib/jsonpath.ex:7: Mix.Tasks.Execute.run/1
  

• $.key-dash
  Input:

  {"key-dash": "value"}
  

  Expected output:

  ["value"]
  

  Error:

  ** (MatchError) no match of right hand side value: {:error, %ExJSONPath.ParsingError{message: "illegal characters \"-d\""}}
      lib/jsonpath.ex:7: Mix.Tasks.Execute.run/1
  

• $.屬性
  Input:

  {"\u5c6c\u6027": "value"}
  

  Expected output:

  ["value"]
  

  Error:

  ** (MatchError) no match of right hand side value: {:error, %ExJSONPath.ParsingError{message: "illegal characters \"屬\""}}
      lib/jsonpath.ex:7: Mix.Tasks.Execute.run/1
  

• $.2
  Input:

  {"a": "first", "2": "second", "b": "third"}
  

  Expected output:

  ["second"]
  

  Actual output:

  []
  

• $..*
  Input:

  {"key": "value", "another key": {"complex": "string", "primitives": [0, 1]}}
  

  Expected output (in any order as no consensus on ordering exists):

  ["string", "value", 0, 1, [0, 1], {"complex": "string", "primitives": [0, 1]}]
  

  Error:

  ** (MatchError) no match of right hand side value: {:error, %ExJSONPath.ParsingError{message: "syntax error before: '*'"}}
      lib/jsonpath.ex:7: Mix.Tasks.Execute.run/1
  

• $
  Input:

  {"key": "value", "another key": {"complex": ["a", 1]}}
  

  Expected output:

  [{"another key": {"complex": ["a", 1]}, "key": "value"}]
  

  Error:

  ** (MatchError) no match of right hand side value: {:error, %ExJSONPath.ParsingError{message: "syntax error before: "}}
      lib/jsonpath.ex:7: Mix.Tasks.Execute.run/1
  

For reference, the output was generated by the program in https://github.com/cburgmer/json-path-comparison/tree/master/implementations/Elixir_ExJsonPath.

[bettio]

Thank you for reporting all these issues, I'll look into them.