rails--rails/activesupport/test/json/decoding_test.rb

require "abstract_unit"
require "active_support/json"
require "active_support/time"
require "time_zone_test_helpers"

class TestJSONDecoding < ActiveSupport::TestCase
  include TimeZoneTestHelpers

  class Foo
    def self.json_create(object)
      "Foo"
    end
  end

  TESTS = {
    %q({"returnTo":{"\/categories":"\/"}})        => {"returnTo" => {"/categories" => "/"}},
    %q({"return\\"To\\":":{"\/categories":"\/"}}) => {"return\"To\":" => {"/categories" => "/"}},
    %q({"returnTo":{"\/categories":1}})          => {"returnTo" => {"/categories" => 1}},
    %({"returnTo":[1,"a"]})                    => {"returnTo" => [1, "a"]},
    %({"returnTo":[1,"\\"a\\",", "b"]})        => {"returnTo" => [1, "\"a\",", "b"]},
    %({"a": "'", "b": "5,000"})                  => {"a" => "'", "b" => "5,000"},
    %({"a": "a's, b's and c's", "b": "5,000"})   => {"a" => "a's, b's and c's", "b" => "5,000"},
    # multibyte
    %({"matzue": "松江", "asakusa": "浅草"}) => {"matzue" => "松江", "asakusa" => "浅草"},
    %({"a": "2007-01-01"})                       => {"a" => Date.new(2007, 1, 1)},
    %({"a": "2007-01-01 01:12:34 Z"})            => {"a" => Time.utc(2007, 1, 1, 1, 12, 34)},
    %(["2007-01-01 01:12:34 Z"])                 => [Time.utc(2007, 1, 1, 1, 12, 34)],
    %(["2007-01-01 01:12:34 Z", "2007-01-01 01:12:35 Z"]) => [Time.utc(2007, 1, 1, 1, 12, 34), Time.utc(2007, 1, 1, 1, 12, 35)],
    # no time zone
    %({"a": "2007-01-01 01:12:34"})              => {"a" => Time.new(2007, 1, 1, 1, 12, 34, "-05:00")},
    # invalid date
    %({"a": "1089-10-40"})                       => {"a" => "1089-10-40"},
    # xmlschema date notation
    %({"a": "2009-08-10T19:01:02"})              => {"a" => Time.new(2009, 8, 10, 19, 1, 2, "-04:00")},
    %({"a": "2009-08-10T19:01:02Z"})             => {"a" => Time.utc(2009, 8, 10, 19, 1, 2)},
    %({"a": "2009-08-10T19:01:02+02:00"})        => {"a" => Time.utc(2009, 8, 10, 17, 1, 2)},
    %({"a": "2009-08-10T19:01:02-05:00"})        => {"a" => Time.utc(2009, 8, 11, 00, 1, 2)},
    # needs to be *exact*
    %({"a": " 2007-01-01 01:12:34 Z "})          => {"a" => " 2007-01-01 01:12:34 Z "},
    %({"a": "2007-01-01 : it's your birthday"})  => {"a" => "2007-01-01 : it's your birthday"},
    %([])    => [],
    %({})    => {},
    %({"a":1})     => {"a" => 1},
    %({"a": ""})    => {"a" => ""},
    %({"a":"\\""}) => {"a" => "\""},
    %({"a": null})  => {"a" => nil},
    %({"a": true})  => {"a" => true},
    %({"a": false}) => {"a" => false},
    '{"bad":"\\\\","trailing":""}' => {"bad" => "\\", "trailing" => ""},
    %q({"a": "http:\/\/test.host\/posts\/1"}) => {"a" => "http://test.host/posts/1"},
    %q({"a": "\u003cunicode\u0020escape\u003e"}) => {"a" => "<unicode escape>"},
    '{"a": "\\\\u0020skip double backslashes"}' => {"a" => "\\u0020skip double backslashes"},
    %q({"a": "\u003cbr /\u003e"}) => {"a" => "<br />"},
    %q({"b":["\u003ci\u003e","\u003cb\u003e","\u003cu\u003e"]}) => {"b" => ["<i>","<b>","<u>"]},
    # test combination of dates and escaped or unicode encoded data in arrays
    %q([{"d":"1970-01-01", "s":"\u0020escape"},{"d":"1970-01-01", "s":"\u0020escape"}]) =>
      [{"d" => Date.new(1970, 1, 1), "s" => " escape"},{"d" => Date.new(1970, 1, 1), "s" => " escape"}],
    %q([{"d":"1970-01-01","s":"http:\/\/example.com"},{"d":"1970-01-01","s":"http:\/\/example.com"}]) =>
      [{"d" => Date.new(1970, 1, 1), "s" => "http://example.com"},
       {"d" => Date.new(1970, 1, 1), "s" => "http://example.com"}],
    # tests escaping of "\n" char with Yaml backend
    %q({"a":"\n"})  => {"a"=>"\n"},
    %q({"a":"\u000a"}) => {"a"=>"\n"},
    %q({"a":"Line1\u000aLine2"}) => {"a"=>"Line1\nLine2"},
    # prevent json unmarshalling
    '{"json_class":"TestJSONDecoding::Foo"}' => {"json_class"=>"TestJSONDecoding::Foo"},
    # json "fragments" - these are invalid JSON, but ActionPack relies on this
    '"a string"' => "a string",
    "1.1" => 1.1,
    "1" => 1,
    "-1" => -1,
    "true" => true,
    "false" => false,
    "null" => nil
  }

  TESTS.each_with_index do |(json, expected), index|
    test "json decodes #{index}" do
      with_tz_default "Eastern Time (US & Canada)" do
        with_parse_json_times(true) do
          silence_warnings do
            assert_equal expected, ActiveSupport::JSON.decode(json), "JSON decoding \
            failed for #{json}"
          end
        end
      end
    end
  end

  test "json decodes time json with time parsing disabled" do
    with_parse_json_times(false) do
      expected = {"a" => "2007-01-01 01:12:34 Z"}
      assert_equal expected, ActiveSupport::JSON.decode(%({"a": "2007-01-01 01:12:34 Z"}))
    end
  end

  def test_failed_json_decoding
    assert_raise(ActiveSupport::JSON.parse_error) { ActiveSupport::JSON.decode(%(undefined)) }
    assert_raise(ActiveSupport::JSON.parse_error) { ActiveSupport::JSON.decode(%({a: 1})) }
    assert_raise(ActiveSupport::JSON.parse_error) { ActiveSupport::JSON.decode(%({: 1})) }
    assert_raise(ActiveSupport::JSON.parse_error) { ActiveSupport::JSON.decode(%()) }
  end

  def test_cannot_pass_unsupported_options
    assert_raise(ArgumentError) { ActiveSupport::JSON.decode("", create_additions: true) }
  end

  private

    def with_parse_json_times(value)
      old_value = ActiveSupport.parse_json_times
      ActiveSupport.parse_json_times = value
      yield
    ensure
      ActiveSupport.parse_json_times = old_value
    end
end