Nim/tests/stdlib/tjson.nim

discard """
  matrix: "; --backend:cpp; --backend:js --jsbigint64:off -d:nimStringHash2; --backend:js --jsbigint64:on"
"""


#[
Note: Macro tests are in tests/stdlib/tjsonmacro.nim
]#

import std/[json,parsejson,strutils]
import std/private/jsutils
from std/math import isNaN
when not defined(js):
  import std/streams
import stdtest/testutils
from std/fenv import epsilon
import std/[assertions, objectdollar]

proc testRoundtrip[T](t: T, expected: string) =
  # checks that `T => json => T2 => json2` is such that json2 = json
  let j = %t
  doAssert $j == expected, $j
  doAssert %(j.to(T)) == j

proc testRoundtripVal[T](t: T, expected: string) =
  # similar to testRoundtrip, but also checks that the `T => json => T2` is such that `T2 == T`
  # note that this isn't always possible, e.g. for pointer-like types or nans
  let j = %t
  doAssert $j == expected, $j
  let j2 = ($j).parseJson
  doAssert $j2 == expected, $(j2, t)
  let t2 = j2.to(T)
  doAssert t2 == t
  doAssert $(%* t2) == expected # sanity check, because -0.0 = 0.0 but their json representation differs

let testJson = parseJson"""{ "a": [1, 2, 3, 4], "b": "asd", "c": "\ud83c\udf83", "d": "\u00E6"}"""
# nil passthrough
doAssert(testJson{"doesnt_exist"}{"anything"}.isNil)
testJson{["e", "f"]} = %true
doAssert(testJson["e"]["f"].bval)

# make sure UTF-16 decoding works.
doAssert(testJson["c"].str == "🎃")
doAssert(testJson["d"].str == "æ")

# make sure no memory leek when parsing invalid string
let startMemory = getOccupiedMem()
for i in 0 .. 10000:
  try:
    discard parseJson"""{ invalid"""
  except:
    discard
# memory diff should less than 4M
doAssert(abs(getOccupiedMem() - startMemory) < 4 * 1024 * 1024)


# test `$`
let stringified = $testJson
let parsedAgain = parseJson(stringified)
doAssert(parsedAgain["b"].str == "asd")

parsedAgain["abc"] = %5
doAssert parsedAgain["abc"].num == 5

# Bounds checking
when compileOption("boundChecks"):
  try:
    let a = testJson["a"][9]
    doAssert(false, "IndexDefect not thrown")
  except IndexDefect:
    discard
  try:
    let a = testJson["a"][-1]
    doAssert(false, "IndexDefect not thrown")
  except IndexDefect:
    discard
  try:
    doAssert(testJson["a"][0].num == 1, "Index doesn't correspond to its value")
  except:
    doAssert(false, "IndexDefect thrown for valid index")

doAssert(testJson{"b"}.getStr() == "asd", "Couldn't fetch a singly nested key with {}")
doAssert(isNil(testJson{"nonexistent"}), "Non-existent keys should return nil")
doAssert(isNil(testJson{"a", "b"}), "Indexing through a list should return nil")
doAssert(isNil(testJson{"a", "b"}), "Indexing through a list should return nil")
doAssert(testJson{"a"} == parseJson"[1, 2, 3, 4]", "Didn't return a non-JObject when there was one to be found")
doAssert(isNil(parseJson("[1, 2, 3]"){"foo"}), "Indexing directly into a list should return nil")

# Generator:
var j = %* [{"name": "John", "age": 30}, {"name": "Susan", "age": 31}]
doAssert j == %[%{"name": %"John", "age": %30}, %{"name": %"Susan", "age": %31}]

var j2 = %*
  [
    {
      "name": "John",
      "age": 30
    },
    {
      "name": "Susan",
      "age": 31
    }
  ]
doAssert j2 == %[%{"name": %"John", "age": %30}, %{"name": %"Susan", "age": %31}]

var name = "John"
let herAge = 30
const hisAge = 31

var j3 = %*
  [ {"name": "John"
    , "age": herAge
    }
  , {"name": "Susan"
    , "age": hisAge
    }
  ]
doAssert j3 == %[%{"name": %"John", "age": %30}, %{"name": %"Susan", "age": %31}]

var j4 = %*{"test": nil}
doAssert j4 == %{"test": newJNull()}

let seqOfNodes = @[%1, %2]
let jSeqOfNodes = %seqOfNodes
doAssert(jSeqOfNodes[1].num == 2)

type MyObj = object
  a, b: int
  s: string
  f32: float32
  f64: float64
  next: ref MyObj
var m: MyObj
m.s = "hi"
m.a = 5
let jMyObj = %m
doAssert(jMyObj["a"].num == 5)
doAssert(jMyObj["s"].str == "hi")

# Test loading of file.
when not defined(js):
  var parsed = parseFile("tests/testdata/jsontest.json")

  try:
    discard parsed["key2"][12123]
    doAssert(false)
  except IndexDefect: doAssert(true)

  var parsed2 = parseFile("tests/testdata/jsontest2.json")
  doAssert(parsed2{"repository", "description"}.str ==
      "IRC Library for Haskell", "Couldn't fetch via multiply nested key using {}")

doAssert escapeJsonUnquoted("\10Foo🎃barÄ") == "\\nFoo🎃barÄ"
doAssert escapeJsonUnquoted("\0\7\20") == "\\u0000\\u0007\\u0014" # for #7887
doAssert escapeJson("\10Foo🎃barÄ") == "\"\\nFoo🎃barÄ\""
doAssert escapeJson("\0\7\20") == "\"\\u0000\\u0007\\u0014\"" # for #7887

# Test with extra data
when not defined(js):
  try:
    discard parseJson("123 456")
    doAssert(false)
  except JsonParsingError:
    doAssert getCurrentExceptionMsg().contains(errorMessages[errEofExpected])

  try:
    discard parseFile("tests/testdata/jsonwithextradata.json")
    doAssert(false)
  except JsonParsingError:
    doAssert getCurrentExceptionMsg().contains(errorMessages[errEofExpected])

# bug #6438
doAssert($ %*[] == "[]")
doAssert($ %*{} == "{}")

doAssert(not compiles(%{"error": "No messages"}))

# bug #9111
block:
  type
    Bar = string
    Foo = object
      a: int
      b: Bar

  let
    js = """{"a": 123, "b": "abc"}""".parseJson
    foo = js.to Foo

  doAssert(foo.b == "abc")

# Generate constructors for range[T] types
block:
  type
    Q1 = range[0'u8 .. 50'u8]
    Q2 = range[0'u16 .. 50'u16]
    Q3 = range[0'u32 .. 50'u32]
    Q4 = range[0'i8 .. 50'i8]
    Q5 = range[0'i16 .. 50'i16]
    Q6 = range[0'i32 .. 50'i32]
    Q7 = range[0'f32 .. 50'f32]
    Q8 = range[0'f64 .. 50'f64]
    Q9 = range[0 .. 50]

    X = object
      m1: Q1
      m2: Q2
      m3: Q3
      m4: Q4
      m5: Q5
      m6: Q6
      m7: Q7
      m8: Q8
      m9: Q9

  let obj = X(
    m1: Q1(42),
    m2: Q2(42),
    m3: Q3(42),
    m4: Q4(42),
    m5: Q5(42),
    m6: Q6(42),
    m7: Q7(42),
    m8: Q8(42),
    m9: Q9(42)
  )

  doAssert(obj == to(%obj, type(obj)))

  when not defined(js):
    const fragments = """[1,2,3] {"hi":3} 12 [] """
    var res = ""
    for x in parseJsonFragments(newStringStream(fragments)):
      res.add($x)
      res.add " "
    doAssert res == fragments


# test isRefSkipDistinct
type
  MyRef = ref object
  MyObject = object
  MyDistinct = distinct MyRef
  MyOtherDistinct = distinct MyRef

var x0: ref int
var x1: MyRef
var x2: MyObject
var x3: MyDistinct
var x4: MyOtherDistinct

doAssert isRefSkipDistinct(x0)
doAssert isRefSkipDistinct(x1)
doAssert not isRefSkipDistinct(x2)
doAssert isRefSkipDistinct(x3)
doAssert isRefSkipDistinct(x4)


doAssert isRefSkipDistinct(ref int)
doAssert isRefSkipDistinct(MyRef)
doAssert not isRefSkipDistinct(MyObject)
doAssert isRefSkipDistinct(MyDistinct)
doAssert isRefSkipDistinct(MyOtherDistinct)

let x = parseJson("9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999")

doAssert x.kind == JString

block: # bug #15835
  type
    Foo = object
      ii*: int
      data*: JsonNode

  block:
    const jt = """{"ii": 123, "data": ["some", "data"]}"""
    let js = parseJson(jt)
    discard js.to(Foo)

  block:
    const jt = """{"ii": 123}"""
    let js = parseJson(jt)
    doAssertRaises(KeyError):
      echo js.to(Foo)

type
  ContentNodeKind* = enum
    P,
    Br,
    Text,
  ContentNode* = object
    case kind*: ContentNodeKind
    of P: pChildren*: seq[ContentNode]
    of Br: nil
    of Text: textStr*: string

let mynode = ContentNode(kind: P, pChildren: @[
  ContentNode(kind: Text, textStr: "mychild"),
  ContentNode(kind: Br)
])

doAssert $mynode == """(kind: P, pChildren: @[(kind: Text, textStr: "mychild"), (kind: Br)])"""

let jsonNode = %*mynode
doAssert $jsonNode == """{"kind":"P","pChildren":[{"kind":"Text","textStr":"mychild"},{"kind":"Br"}]}"""
doAssert $jsonNode.to(ContentNode) == """(kind: P, pChildren: @[(kind: Text, textStr: "mychild"), (kind: Br)])"""

block: # bug #17383
  testRoundtrip(int32.high): "2147483647"
  testRoundtrip(uint32.high): "4294967295"
  when int.sizeof == 4:
    testRoundtrip(int.high): "2147483647"
    testRoundtrip(uint.high): "4294967295"
  else:
    testRoundtrip(int.high): "9223372036854775807"
    testRoundtrip(uint.high): "18446744073709551615"
  when hasWorkingInt64:
    testRoundtrip(int64.high): "9223372036854775807"
    testRoundtrip(uint64.high): "18446744073709551615"

block: # bug #18007
  testRoundtrip([NaN, Inf, -Inf, 0.0, -0.0, 1.0]): """["nan","inf","-inf",0.0,-0.0,1.0]"""
  # pending https://github.com/nim-lang/Nim/issues/18025 use:
  # testRoundtrip([float32(NaN), Inf, -Inf, 0.0, -0.0, 1.0])
  let inf = float32(Inf)
  testRoundtrip([float32(NaN), inf, -inf, 0.0, -0.0, 1.0]): """["nan","inf","-inf",0.0,-0.0,1.0]"""
  when not defined(js): # because of Infinity vs inf
    testRoundtripVal([inf, -inf, 0.0, -0.0, 1.0]): """["inf","-inf",0.0,-0.0,1.0]"""
  let a = parseJson($(%NaN)).to(float)
  doAssert a.isNaN

  whenRuntimeJs: discard # refs bug #18009
  do:
    testRoundtripVal(0.0): "0.0"
    testRoundtripVal(-0.0): "-0.0"

block: # bug #15397, bug #13196
  testRoundtripVal(1.0 + epsilon(float64)): "1.0000000000000002"
  testRoundtripVal(0.12345678901234567890123456789): "0.12345678901234568"

block:
  let a = "18446744073709551615"
  let b = a.parseJson
  doAssert b.kind == JString
  let c = $b
  when defined(js):
    doAssert c == "18446744073709552000"
  else:
    doAssert c == "18446744073709551615"

block:
  let a = """
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
    [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
"""

  when not defined(js):
    try:
      discard parseJson(a)
    except JsonParsingError:
      doAssert getCurrentExceptionMsg().contains("] expected")