test_json_generate.rb

#!/usr/bin/env ruby
# -*- coding: utf-8 -*-

require 'test/unit'
require File.join(File.dirname(__FILE__), 'setup_variant')

class TC_JSONGenerate < Test::Unit::TestCase
  include JSON

  def setup
    @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_generate
    json = generate(@hash)
    assert_equal(JSON.parse(@json2), JSON.parse(json))
    json = JSON[@hash]
    assert_equal(JSON.parse(@json2), JSON.parse(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)
    assert_raise(GeneratorError) { generate(666) }
    assert_equal '666', generate(666, :quirks_mode => true)
  end

  def test_generate_pretty
    json = pretty_generate(@hash)
    # hashes aren't (insertion) ordered on every ruby implementation assert_equal(@json3, json)
    assert_equal(JSON.parse(@json3), JSON.parse(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)
    assert_raise(GeneratorError) { pretty_generate(666) }
    assert_equal '666', pretty_generate(666, :quirks_mode => true)
  end

  def test_fast_generate
    json = fast_generate(@hash)
    assert_equal(JSON.parse(@json2), JSON.parse(json))
    parsed_json = parse(json)
    assert_equal(@hash, parsed_json)
    json = fast_generate({1=>2})
    assert_equal('{"1":2}', json)
    parsed_json = parse(json)
    assert_equal({"1"=>2}, parsed_json)
    assert_raise(GeneratorError) { fast_generate(666) }
    assert_equal '666', fast_generate(666, :quirks_mode => true)
  end

  def test_own_state
    state = State.new
    json = generate(@hash, state)
    assert_equal(JSON.parse(@json2), JSON.parse(json))
    parsed_json = parse(json)
    assert_equal(@hash, parsed_json)
    json = generate({1=>2}, state)
    assert_equal('{"1":2}', json)
    parsed_json = parse(json)
    assert_equal({"1"=>2}, parsed_json)
    assert_raise(GeneratorError) { generate(666, state) }
    state.quirks_mode = true
    assert state.quirks_mode?
    assert_equal '666', generate(666, state)
  end

  def test_states
    json = generate({1=>2}, nil)
    assert_equal('{"1":2}', json)
    s = JSON.state.new
    assert s.check_circular?
    assert s[:check_circular?]
    h = { 1=>2 }
    h[3] = h
    assert_raises(JSON::NestingError) {  generate(h) }
    assert_raises(JSON::NestingError) {  generate(h, s) }
    s = JSON.state.new
    a = [ 1, 2 ]
    a << a
    assert_raises(JSON::NestingError) {  generate(a, s) }
    assert s.check_circular?
    assert s[:check_circular?]
  end

  def test_pretty_state
    state = PRETTY_STATE_PROTOTYPE.dup
    assert_equal({
      :allow_nan             => false,
      :array_nl              => "\n",
      :ascii_only            => false,
      :buffer_initial_length => 1024,
      :quirks_mode           => false,
      :depth                 => 0,
      :indent                => "  ",
      :max_nesting           => 19,
      :object_nl             => "\n",
      :space                 => " ",
      :space_before          => "",
    }.sort_by { |n,| n.to_s }, state.to_h.sort_by { |n,| n.to_s })
  end

  def test_safe_state
    state = SAFE_STATE_PROTOTYPE.dup
    assert_equal({
      :allow_nan             => false,
      :array_nl              => "",
      :ascii_only            => false,
      :buffer_initial_length => 1024,
      :quirks_mode           => false,
      :depth                 => 0,
      :indent                => "",
      :max_nesting           => 19,
      :object_nl             => "",
      :space                 => "",
      :space_before          => "",
    }.sort_by { |n,| n.to_s }, state.to_h.sort_by { |n,| n.to_s })
  end

  def test_fast_state
    state = FAST_STATE_PROTOTYPE.dup
    assert_equal({
      :allow_nan             => false,
      :array_nl              => "",
      :ascii_only            => false,
      :buffer_initial_length => 1024,
      :quirks_mode           => false,
      :depth                 => 0,
      :indent                => "",
      :max_nesting           => 0,
      :object_nl             => "",
      :space                 => "",
      :space_before          => "",
    }.sort_by { |n,| n.to_s }, state.to_h.sort_by { |n,| n.to_s })
  end

  def test_allow_nan
    assert_raises(GeneratorError) { generate([JSON::NaN]) }
    assert_equal '[NaN]', generate([JSON::NaN], :allow_nan => true)
    assert_raises(GeneratorError) { fast_generate([JSON::NaN]) }
    assert_raises(GeneratorError) { pretty_generate([JSON::NaN]) }
    assert_equal "[\n  NaN\n]", pretty_generate([JSON::NaN], :allow_nan => true)
    assert_raises(GeneratorError) { generate([JSON::Infinity]) }
    assert_equal '[Infinity]', generate([JSON::Infinity], :allow_nan => true)
    assert_raises(GeneratorError) { fast_generate([JSON::Infinity]) }
    assert_raises(GeneratorError) { pretty_generate([JSON::Infinity]) }
    assert_equal "[\n  Infinity\n]", pretty_generate([JSON::Infinity], :allow_nan => true)
    assert_raises(GeneratorError) { generate([JSON::MinusInfinity]) }
    assert_equal '[-Infinity]', generate([JSON::MinusInfinity], :allow_nan => true)
    assert_raises(GeneratorError) { fast_generate([JSON::MinusInfinity]) }
    assert_raises(GeneratorError) { pretty_generate([JSON::MinusInfinity]) }
    assert_equal "[\n  -Infinity\n]", pretty_generate([JSON::MinusInfinity], :allow_nan => true)
  end

  def test_depth
    ary = []; ary << ary
    assert_equal 0, JSON::SAFE_STATE_PROTOTYPE.depth
    assert_raises(JSON::NestingError) { JSON.generate(ary) }
    assert_equal 0, JSON::SAFE_STATE_PROTOTYPE.depth
    assert_equal 0, JSON::PRETTY_STATE_PROTOTYPE.depth
    assert_raises(JSON::NestingError) { JSON.pretty_generate(ary) }
    assert_equal 0, JSON::PRETTY_STATE_PROTOTYPE.depth
    s = JSON.state.new
    assert_equal 0, s.depth
    assert_raises(JSON::NestingError) { ary.to_json(s) }
    assert_equal 19, s.depth
  end

  def test_buffer_initial_length
    s = JSON.state.new
    assert_equal 1024, s.buffer_initial_length
    s.buffer_initial_length = 0
    assert_equal 1024, s.buffer_initial_length
    s.buffer_initial_length = -1
    assert_equal 1024, s.buffer_initial_length
    s.buffer_initial_length = 128
    assert_equal 128, s.buffer_initial_length
  end

  def test_gc
    bignum_too_long_to_embed_as_string = 1234567890123456789012345
    expect = bignum_too_long_to_embed_as_string.to_s
    stress, GC.stress = GC.stress, true

    10.times do |i|
      tmp = bignum_too_long_to_embed_as_string.to_json
      assert_equal expect, tmp
    end
  ensure
    GC.stress = stress
  end if GC.respond_to?(:stress=)

  def test_broken_bignum # [ruby-core:38867]
    pid = fork do
      Bignum.class_eval do
        def to_s
        end
      end
      begin
        JSON::Ext::Generator::State.new.generate(1<<64)
        exit 1
      rescue TypeError
        exit 0
      end
    end
    _, status = Process.waitpid2(pid)
    assert status.success?
  rescue NotImplementedError
    # forking to avoid modifying core class of a parent process and
    # introducing race conditions of tests are run in parallel
  end if defined?(JSON::Ext)
end