* lib/json.rb, lib/json, ext/json, test/json:

import JSON library.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12428 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/json/fixtures/fail1.json

@@ -0,0 +1 @@
+"A JSON payload should be an object or array, not a string."

test/json/fixtures/fail10.json

@@ -0,0 +1 @@
+{"Extra value after close": true} "misplaced quoted value"

test/json/fixtures/fail11.json

@@ -0,0 +1 @@
+{"Illegal expression": 1 + 2}

test/json/fixtures/fail12.json

@@ -0,0 +1 @@
+{"Illegal invocation": alert()}

test/json/fixtures/fail13.json

@@ -0,0 +1 @@
+{"Numbers cannot have leading zeroes": 013}

test/json/fixtures/fail14.json

@@ -0,0 +1 @@
+{"Numbers cannot be hex": 0x14}

test/json/fixtures/fail18.json

@@ -0,0 +1 @@
+[[[[[[[[[[[[[[[[[[[["Too deep"]]]]]]]]]]]]]]]]]]]] // No, we don't limit our depth: Moved to pass...

test/json/fixtures/fail19.json

@@ -0,0 +1 @@
+{"Missing colon" null}

test/json/fixtures/fail2.json

@@ -0,0 +1 @@
+["Unclosed array"

test/json/fixtures/fail20.json

@@ -0,0 +1 @@
+{"Double colon":: null}

test/json/fixtures/fail21.json

@@ -0,0 +1 @@
+{"Comma instead of colon", null}

test/json/fixtures/fail22.json

@@ -0,0 +1 @@
+["Colon instead of comma": false]

test/json/fixtures/fail23.json

@@ -0,0 +1 @@
+["Bad value", truth]

test/json/fixtures/fail24.json

@@ -0,0 +1 @@
+['single quote']

test/json/fixtures/fail25.json

@@ -0,0 +1 @@
+["tab	character	in	string	"]

test/json/fixtures/fail27.json

@@ -0,0 +1,2 @@
+["line
+break"]

test/json/fixtures/fail28.json

@@ -0,0 +1,2 @@
+["line\
+break"]

test/json/fixtures/fail3.json

@@ -0,0 +1 @@
+{unquoted_key: "keys must be quoted"}

test/json/fixtures/fail4.json

@@ -0,0 +1 @@
+["extra comma",]

test/json/fixtures/fail5.json

@@ -0,0 +1 @@
+["double extra comma",,]

test/json/fixtures/fail6.json

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+[   , "<-- missing value"]

test/json/fixtures/fail7.json

@@ -0,0 +1 @@
+["Comma after the close"],

test/json/fixtures/fail8.json

@@ -0,0 +1 @@
+["Extra close"]]

test/json/fixtures/fail9.json

@@ -0,0 +1 @@
+{"Extra comma": true,}

test/json/fixtures/pass1.json

@@ -0,0 +1,56 @@
+[
+    "JSON Test Pattern pass1",
+    {"object with 1 member":["array with 1 element"]},
+    {},
+    [],
+    -42,
+    true,
+    false,
+    null,
+    {
+        "integer": 1234567890,
+        "real": -9876.543210,
+        "e": 0.123456789e-12,
+        "E": 1.234567890E+34,
+        "":  23456789012E666,
+        "zero": 0,
+        "one": 1,
+        "space": " ",
+        "quote": "\"",
+        "backslash": "\\",
+        "controls": "\b\f\n\r\t",
+        "slash": "/ & \/",
+        "alpha": "abcdefghijklmnopqrstuvwyz",
+        "ALPHA": "ABCDEFGHIJKLMNOPQRSTUVWYZ",
+        "digit": "0123456789",
+        "special": "`1~!@#$%^&*()_+-={':[,]}|;.</>?",
+        "hex": "\u0123\u4567\u89AB\uCDEF\uabcd\uef4A",
+        "true": true,
+        "false": false,
+        "null": null,
+        "array":[  ],
+        "object":{  },
+        "address": "50 St. James Street",
+        "url": "http://www.JSON.org/",
+        "comment": "// /* <!-- --",
+        "# -- --> */": " ",
+        " s p a c e d " :[1,2 , 3
+
+,
+
+4 , 5        ,          6           ,7        ],
+        "compact": [1,2,3,4,5,6,7],
+        "jsontext": "{\"object with 1 member\":[\"array with 1 element\"]}",
+        "quotes": "&#34; \u0022 %22 0x22 034 &#x22;",
+        "\/\\\"\uCAFE\uBABE\uAB98\uFCDE\ubcda\uef4A\b\f\n\r\t`1~!@#$%^&*()_+-=[]{}|;:',./<>?"
+: "A key can be any string"
+    },
+    0.5 ,98.6
+,
+99.44
+,
+
+1066
+
+
+,"rosebud"]

test/json/fixtures/pass15.json

@@ -0,0 +1 @@
+["Illegal backslash escape: \x15"]

test/json/fixtures/pass16.json

@@ -0,0 +1 @@
+["Illegal backslash escape: \'"]

test/json/fixtures/pass17.json

@@ -0,0 +1 @@
+["Illegal backslash escape: \017"]

test/json/fixtures/pass2.json

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+[[[[[[[[[[[[[[[[[[["Not too deep"]]]]]]]]]]]]]]]]]]]

test/json/fixtures/pass26.json

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+["tab\   character\   in\  string\  "]

test/json/fixtures/pass3.json

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+{
+    "JSON Test Pattern pass3": {
+        "The outermost value": "must be an object or array.",
+        "In this test": "It is an object."
+    }
+}

test/json/runner.rb

@@ -0,0 +1,24 @@
+#!/usr/bin/env ruby
+
+require 'test/unit/ui/console/testrunner'
+require 'test/unit/testsuite'
+$:.unshift File.expand_path(File.dirname($0))
+$:.unshift 'tests'
+require 'test_json'
+require 'test_json_generate'
+require 'test_json_unicode'
+require 'test_json_addition'
+require 'test_json_fixtures'
+
+class TS_AllTests
+  def self.suite
+    suite = Test::Unit::TestSuite.new name
+    suite << TC_JSONGenerate.suite
+    suite << TC_JSON.suite
+    suite << TC_JSONUnicode.suite
+    suite << TC_JSONAddition.suite
+    suite << TC_JSONFixtures.suite
+  end
+end
+Test::Unit::UI::Console::TestRunner.run(TS_AllTests)
+  # vim: set et sw=2 ts=2:

test/json/test_json.rb

@@ -0,0 +1,255 @@
+#!/usr/bin/env ruby
+
+require 'test/unit'
+require 'json'
+
+class TC_JSON < Test::Unit::TestCase
+  include JSON
+
+  def setup
+    $KCODE = 'UTF8'
+    @ary = [1, "foo", 3.14, 4711.0, 2.718, nil, [1,-2,3], false, true].map do
+      |x| [x]
+    end
+    @ary_to_parse = ["1", '"foo"', "3.14", "4711.0", "2.718", "null",
+      "[1,-2,3]", "false", "true"].map do
+      |x| "[#{x}]"
+    end
+    @hash = {
+      'a' => 2,
+      'b' => 3.141,
+      'c' => 'c',
+      'd' => [ 1, "b", 3.14 ],
+      'e' => { 'foo' => 'bar' },
+      'g' => "\"\0\037",
+      'h' => 1000.0,
+      'i' => 0.001
+    }
+    @json = '{"a":2,"b":3.141,"c":"c","d":[1,"b",3.14],"e":{"foo":"bar"},' +
+      '"g":"\\"\\u0000\\u001f","h":1.0E3,"i":1.0E-3}'
+  end
+    suite << TC_JSON.suite
+
+  def test_construction
+    parser = JSON::Parser.new('test')
+    assert_equal 'test', parser.source
+  end
+
+  def assert_equal_float(expected, is)
+    assert_in_delta(expected.first, is.first, 1e-2)
+  end
+
+  def test_parse_simple_arrays
+    assert_equal([], parse('[]'))
+    assert_equal([], parse('  [  ] '))
+    assert_equal([nil], parse('[null]'))
+    assert_equal([false], parse('[false]'))
+    assert_equal([true], parse('[true]'))
+    assert_equal([-23], parse('[-23]'))
+    assert_equal([23], parse('[23]'))
+    assert_equal([0.23], parse('[0.23]'))
+    assert_equal([0.0], parse('[0e0]'))
+    assert_raises(JSON::ParserError) { parse('[+23.2]') }
+    assert_raises(JSON::ParserError) { parse('[+23]') }
+    assert_raises(JSON::ParserError) { parse('[.23]') }
+    assert_raises(JSON::ParserError) { parse('[023]') }
+    assert_equal_float [3.141], parse('[3.141]')
+    assert_equal_float [-3.141], parse('[-3.141]')
+    assert_equal_float [3.141], parse('[3141e-3]')
+    assert_equal_float [3.141], parse('[3141.1e-3]')
+    assert_equal_float [3.141], parse('[3141E-3]')
+    assert_equal_float [3.141], parse('[3141.0E-3]')
+    assert_equal_float [-3.141], parse('[-3141.0e-3]')
+    assert_equal_float [-3.141], parse('[-3141e-3]')
+    assert_equal([""], parse('[""]'))
+    assert_equal(["foobar"], parse('["foobar"]'))
+    assert_equal([{}], parse('[{}]'))
+  end
+
+  def test_parse_simple_objects
+    assert_equal({}, parse('{}'))
+    assert_equal({}, parse(' {   }   '))
+    assert_equal({ "a" => nil }, parse('{   "a"   :  null}'))
+    assert_equal({ "a" => nil }, parse('{"a":null}'))
+    assert_equal({ "a" => false }, parse('{   "a"  :  false  }  '))
+    assert_equal({ "a" => false }, parse('{"a":false}'))
+    assert_raises(JSON::ParserError) { parse('{false}') }
+    assert_equal({ "a" => true }, parse('{"a":true}'))
+    assert_equal({ "a" => true }, parse('  { "a" :  true  }   '))
+    assert_equal({ "a" => -23 }, parse('  {  "a"  :  -23  }  '))
+    assert_equal({ "a" => -23 }, parse('  { "a" : -23 } '))
+    assert_equal({ "a" => 23 }, parse('{"a":23  } '))
+    assert_equal({ "a" => 23 }, parse('  { "a"  : 23  } '))
+    assert_equal({ "a" => 0.23 }, parse(' { "a"  :  0.23 }  '))
+    assert_equal({ "a" => 0.23 }, parse('  {  "a"  :  0.23  }  '))
+  end
+
+  begin
+    require 'permutation'
+    def test_parse_more_complex_arrays
+      a = [ nil, false, true, "foßbar", [ "n€st€d", true ], { "nested" => true, "n€ßt€ð2" => {} }]
+      perms = Permutation.for a
+      perms.each do |perm|
+        orig_ary = perm.project
+        json = pretty_generate(orig_ary)
+        assert_equal orig_ary, parse(json)
+      end
+    end
+
+    def test_parse_complex_objects
+      a = [ nil, false, true, "foßbar", [ "n€st€d", true ], { "nested" => true, "n€ßt€ð2" => {} }]
+      perms = Permutation.for a
+      perms.each do |perm|
+        s = "a"
+        orig_obj = perm.project.inject({}) { |h, x| h[s.dup] = x; s = s.succ; h }
+        json = pretty_generate(orig_obj)
+        assert_equal orig_obj, parse(json)
+      end
+    end
+  rescue LoadError
+    warn "Skipping permutation tests."
+  end
+
+  def test_parse_arrays
+    assert_equal([1,2,3], parse('[1,2,3]'))
+    assert_equal([1.2,2,3], parse('[1.2,2,3]'))
+    assert_equal([[],[[],[]]], parse('[[],[[],[]]]'))
+  end
+
+  def test_parse_values
+    assert_equal([""], parse('[""]'))
+    assert_equal(["\\"], parse('["\\\\"]'))
+    assert_equal(['"'], parse('["\""]'))
+    assert_equal(['\\"\\'], parse('["\\\\\\"\\\\"]'))
+    assert_equal(["\"\b\n\r\t\0\037"],
+      parse('["\"\b\n\r\t\u0000\u001f"]'))
+    for i in 0 ... @ary.size
+      assert_equal(@ary[i], parse(@ary_to_parse[i]))
+    end
+  end
+
+  def test_parse_array
+    assert_equal([], parse('[]'))
+    assert_equal([], parse('  [  ]  '))
+    assert_equal([1], parse('[1]'))
+    assert_equal([1], parse('  [ 1  ]  '))
+    assert_equal(@ary,
+      parse('[[1],["foo"],[3.14],[47.11e+2],[2718.0E-3],[null],[[1,-2,3]]'\
+      ',[false],[true]]'))
+    assert_equal(@ary, parse(%Q{   [   [1] , ["foo"]  ,  [3.14] \t ,  [47.11e+2] 
+      , [2718.0E-3 ],\r[ null] , [[1, -2, 3 ]], [false ],[ true]\n ]  }))
+  end
+
+  def test_parse_object
+    assert_equal({}, parse('{}'))
+    assert_equal({}, parse('  {  }  '))
+    assert_equal({'foo'=>'bar'}, parse('{"foo":"bar"}'))
+    assert_equal({'foo'=>'bar'}, parse('    { "foo"  :   "bar"   }   '))
+  end
+
+  def test_parser_reset
+    parser = Parser.new(@json)
+    assert_equal(@hash, parser.parse)
+    assert_equal(@hash, parser.parse)
+  end
+
+  def test_comments
+    json = <<EOT
+{
+  "key1":"value1", // eol comment
+  "key2":"value2"  /* multi line
+                    *  comment */,
+  "key3":"value3"  /* multi line
+                    // nested eol comment
+                    *  comment */
+}
+EOT
+    assert_equal(
+      { "key1" => "value1", "key2" => "value2", "key3" => "value3" },
+      parse(json))
+    json = <<EOT
+{
+  "key1":"value1"  /* multi line
+                    // nested eol comment
+                    /* illegal nested multi line comment */
+                    *  comment */
+}
+EOT
+    assert_raises(ParserError) { parse(json) }
+    json = <<EOT
+{
+  "key1":"value1"  /* multi line
+                   // nested eol comment
+                   closed multi comment */
+                   and again, throw an Error */
+}
+EOT
+    assert_raises(ParserError) { parse(json) }
+    json = <<EOT
+{
+  "key1":"value1"  /*/*/
+}
+EOT
+    assert_equal({ "key1" => "value1" }, parse(json))
+  end
+
+  def test_backslash
+    data = [ '\\.(?i:gif|jpe?g|png)$' ]
+    json = '["\\\\.(?i:gif|jpe?g|png)$"]'
+    assert_equal json, JSON.unparse(data)
+    assert_equal data, JSON.parse(json)
+    #
+    data = [ '\\"' ]
+    json = '["\\\\\""]'
+    assert_equal json, JSON.unparse(data)
+    assert_equal data, JSON.parse(json)
+    #
+    json = '["\/"]'
+    data = JSON.parse(json)
+    assert_equal ['/'], data
+    assert_equal json, JSON.unparse(data)
+    #
+    json = '["\""]'
+    data = JSON.parse(json)
+    assert_equal ['"'], data
+    assert_equal json, JSON.unparse(data)
+    json = '["\\\'"]'
+    data = JSON.parse(json)
+    assert_equal ["'"], data
+    assert_equal '["\'"]', JSON.unparse(data)
+  end
+
+  def test_wrong_inputs
+    assert_raises(ParserError) { JSON.parse('"foo"') }
+    assert_raises(ParserError) { JSON.parse('123') }
+    assert_raises(ParserError) { JSON.parse('[] bla') }
+    assert_raises(ParserError) { JSON.parse('[] 1') }
+    assert_raises(ParserError) { JSON.parse('[] []') }
+    assert_raises(ParserError) { JSON.parse('[] {}') }
+    assert_raises(ParserError) { JSON.parse('{} []') }
+    assert_raises(ParserError) { JSON.parse('{} {}') }
+    assert_raises(ParserError) { JSON.parse('[NULL]') }
+    assert_raises(ParserError) { JSON.parse('[FALSE]') }
+    assert_raises(ParserError) { JSON.parse('[TRUE]') }
+    assert_raises(ParserError) { JSON.parse('[07]    ') }
+    assert_raises(ParserError) { JSON.parse('[0a]') }
+    assert_raises(ParserError) { JSON.parse('[1.]') }
+    assert_raises(ParserError) { JSON.parse('     ') }
+  end
+
+  def test_nesting
+    to_deep = '[[[[[[[[[[[[[[[[[[[["Too deep"]]]]]]]]]]]]]]]]]]]]'
+    assert_raises(JSON::NestingError) { JSON.parse to_deep }
+    assert_raises(JSON::NestingError) { JSON.parser.new(to_deep).parse }
+    assert_raises(JSON::NestingError) { JSON.parse to_deep, :max_nesting => 19 }
+    ok = JSON.parse to_deep, :max_nesting => 20
+    assert_kind_of Array, ok
+    ok = JSON.parse to_deep, :max_nesting => nil
+    assert_kind_of Array, ok
+    ok = JSON.parse to_deep, :max_nesting => false
+    assert_kind_of Array, ok
+    ok = JSON.parse to_deep, :max_nesting => 0
+    assert_kind_of Array, ok
+  end
+end
+  # vim: set et sw=2 ts=2:

test/json/test_json_addition.rb

@@ -0,0 +1,94 @@
+#!/usr/bin/env ruby
+
+require 'test/unit'
+require 'json'
+
+class TC_JSONAddition < Test::Unit::TestCase
+  include JSON
+
+  class A
+    def initialize(a)
+      @a = a
+    end
+
+    attr_reader :a
+
+    def ==(other)
+      a == other.a
+    end
+    
+    def self.json_create(object)
+      new(*object['args'])
+    end
+
+    def to_json(*args)
+      {
+        'json_class'  => self.class,
+        'args'        => [ @a ],
+      }.to_json(*args)
+    end
+  end
+
+  class B
+    def to_json(*args)
+      {
+        'json_class'  => self.class,
+      }.to_json(*args)
+    end
+  end
+
+  class C
+    def to_json(*args)
+      {
+        'json_class'  => 'TC_JSONAddition::Nix',
+      }.to_json(*args)
+    end
+  end
+
+  def setup
+    $KCODE = 'UTF8'
+  end
+
+  def test_extended_json
+    a = A.new(666)
+    assert A.json_creatable?
+    json = generate(a)
+    a_again = JSON.parse(json)
+    assert_kind_of a.class, a_again
+    assert_equal a, a_again
+  end
+
+  def test_extended_json_fail
+    b = B.new
+    assert !B.json_creatable?
+    json = generate(b)
+    assert_equal({ 'json_class' => B.name }, JSON.parse(json))
+  end
+
+  def test_extended_json_fail
+    c = C.new
+    assert !C.json_creatable?
+    json = generate(c)
+    assert_raises(ArgumentError) { JSON.parse(json) }
+  end
+
+  def test_raw_strings
+    raw = ''
+    raw_array = []
+    for i in 0..255
+      raw << i
+      raw_array << i
+    end
+    json = raw.to_json_raw
+    json_raw_object = raw.to_json_raw_object
+    hash = { 'json_class' => 'String', 'raw'=> raw_array }
+    assert_equal hash, json_raw_object
+    json_raw = <<EOT.chomp
+{\"json_class\":\"String\",\"raw\":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255]}
+EOT
+# "
+    assert_equal json_raw, json
+    raw_again = JSON.parse(json)
+    assert_equal raw, raw_again
+  end
+end

test/json/test_json_fixtures.rb

@@ -0,0 +1,30 @@
+#!/usr/bin/env ruby
+
+require 'test/unit'
+require 'json'
+
+class TC_JSONFixtures < Test::Unit::TestCase
+  def setup
+    $KCODE = 'UTF8'
+    fixtures = File.join(File.dirname(__FILE__), 'fixtures/*.json')
+    passed, failed = Dir[fixtures].partition { |f| f['pass'] }
+    @passed = passed.inject([]) { |a, f| a << [ f, File.read(f) ] }.sort
+    @failed = failed.inject([]) { |a, f| a << [ f, File.read(f) ] }.sort
+  end
+
+  def test_passing
+    for name, source in @passed
+      assert JSON.parse(source),
+        "Did not pass for fixture '#{name}'"
+    end
+  end
+
+  def test_failing
+    for name, source in @failed
+      assert_raises(JSON::ParserError, JSON::NestingError,
+        "Did not fail for fixture '#{name}'") do
+        JSON.parse(source)
+      end
+    end
+  end
+end

test/json/test_json_generate.rb

@@ -0,0 +1,81 @@
+require 'test/unit'
+require 'json'
+
+class TC_JSONGenerate < Test::Unit::TestCase
+  include JSON
+
+  def setup
+    $KCODE = 'UTF8'
+    @hash = {
+      'a' => 2,
+      'b' => 3.141,
+      'c' => 'c',
+      'd' => [ 1, "b", 3.14 ],
+      'e' => { 'foo' => 'bar' },
+      'g' => "\"\0\037",
+      'h' => 1000.0,
+      'i' => 0.001
+    }
+    @json2 = '{"a":2,"b":3.141,"c":"c","d":[1,"b",3.14],"e":{"foo":"bar"},' +
+      '"g":"\\"\\u0000\\u001f","h":1000.0,"i":0.001}'
+    @json3 = <<'EOT'.chomp
+{
+  "a": 2,
+  "b": 3.141,
+  "c": "c",
+  "d": [
+    1,
+    "b",
+    3.14
+  ],
+  "e": {
+    "foo": "bar"
+  },
+  "g": "\"\u0000\u001f",
+  "h": 1000.0,
+  "i": 0.001
+}
+EOT
+  end
+
+  def test_unparse
+    json = unparse(@hash)
+    assert_equal(@json2, json)
+    parsed_json = parse(json)
+    assert_equal(@hash, parsed_json)
+    json = generate({1=>2})
+    assert_equal('{"1":2}', json)
+    parsed_json = parse(json)
+    assert_equal({"1"=>2}, parsed_json)
+  end
+
+  def test_unparse_pretty
+    json = pretty_unparse(@hash)
+    assert_equal(@json3, json)
+    parsed_json = parse(json)
+    assert_equal(@hash, parsed_json)
+    json = pretty_generate({1=>2})
+    assert_equal(<<'EOT'.chomp, json)
+{
+  "1": 2
+}
+EOT
+    parsed_json = parse(json)
+    assert_equal({"1"=>2}, parsed_json)
+  end
+
+  def test_states
+    json = generate({1=>2}, nil)
+    assert_equal('{"1":2}', json)
+    s = JSON.state.new(:check_circular => true)
+    #assert s.check_circular
+    h = { 1=>2 }
+    h[3] = h
+    assert_raises(JSON::CircularDatastructure) {  generate(h, s) }
+    s = JSON.state.new(:check_circular => true)
+    #assert s.check_circular
+    a = [ 1, 2 ]
+    a << a
+    assert_raises(JSON::CircularDatastructure) {  generate(a, s) }
+  end
+end

test/json/test_json_unicode.rb

@@ -0,0 +1,59 @@
+#!/usr/bin/env ruby
+
+require 'test/unit'
+require 'json'
+
+class TC_JSONUnicode < Test::Unit::TestCase
+  include JSON
+
+  def setup
+    $KCODE = 'UTF8'
+  end
+
+  def test_unicode
+    assert_equal '""', ''.to_json
+    assert_equal '"\\b"', "\b".to_json
+    assert_equal '"\u0001"', 0x1.chr.to_json
+    assert_equal '"\u001f"', 0x1f.chr.to_json
+    assert_equal '" "', ' '.to_json
+    assert_equal "\"#{0x7f.chr}\"", 0x7f.chr.to_json
+    utf8 = [ "© ≠ €! \01" ]
+    json = '["\u00a9 \u2260 \u20ac! \u0001"]'
+    assert_equal json, utf8.to_json
+    assert_equal utf8, parse(json)
+    utf8 = ["\343\201\202\343\201\204\343\201\206\343\201\210\343\201\212"]
+    json = "[\"\\u3042\\u3044\\u3046\\u3048\\u304a\"]"
+    assert_equal json, utf8.to_json
+    assert_equal utf8, parse(json)
+    utf8 = ['საქართველო']
+    json = "[\"\\u10e1\\u10d0\\u10e5\\u10d0\\u10e0\\u10d7\\u10d5\\u10d4\\u10da\\u10dd\"]"
+    assert_equal json, utf8.to_json
+    assert_equal utf8, parse(json)
+    assert_equal '["\\u00c3"]', JSON.generate(["Ã"])
+    assert_equal ["€"], JSON.parse('["\u20ac"]')
+    utf8 = ["\xf0\xa0\x80\x81"]
+    json = '["\ud840\udc01"]'
+    assert_equal json, JSON.generate(utf8)
+    assert_equal utf8, JSON.parse(json)
+  end
+
+  def test_chars
+    (0..0x7f).each do |i|
+      c = ('%c' % i)[0] # c is a character object
+      json = '["\u%04x"]' % i
+      assert_equal c, JSON.parse(json).first
+      if c == ?\b
+        generated = JSON.generate(["" << i])
+        assert '["\b"]' == generated || '["\10"]' == generated
+      elsif [?\n, ?\r, ?\t, ?\f].include?(c)
+        assert_equal '[' << ('' << i).dump << ']', JSON.generate(["" << i])
+      elsif i < 0x20
+        assert_equal json, JSON.generate(["" << i])
+      end
+    end
+    assert_raises(JSON::GeneratorError) do
+      JSON.generate(["" << 0x80])
+    end
+    assert_equal "\302\200", JSON.parse('["\u0080"]').first
+  end
+end