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# frozen_string_literal: true
require "abstract_unit"
require "json"
require "json/encoding_test_cases"
# These test cases were added to test that we do not interfere with json gem's
# output when the AS encoder is loaded, primarily for problems reported in
# #20775. They need to be executed in isolation to reproduce the scenario
# correctly, because other test cases might have already loaded additional
# dependencies.
# The AS::JSON encoder requires the BigDecimal core_ext, which, unfortunately,
# changes the BigDecimal#to_s output, and consequently the JSON gem output. So
# we need to require this upfront to ensure we don't get a false failure, but
# ideally we should just fix the BigDecimal core_ext to not change to_s without
# arguments.
require "active_support/core_ext/big_decimal"
class JsonGemEncodingTest < ActiveSupport::TestCase
include ActiveSupport::Testing::Isolation
JSONTest::EncodingTestCases.constants.each_with_index do |name|
JSONTest::EncodingTestCases.const_get(name).each_with_index do |(subject, _), i|
test("#{name[0..-6]} #{i}") do
assert_same_with_or_without_active_support(subject)
end
end
end
class CustomToJson
def to_json(*)
'"custom"'
end
end
test "custom to_json" do
assert_same_with_or_without_active_support(CustomToJson.new)
end
private
def require_or_skip(file)
require(file) || skip("'#{file}' was already loaded")
end
def assert_same_with_or_without_active_support(subject)
begin
expected = JSON.generate(subject, quirks_mode: true)
rescue JSON::GeneratorError => e
exception = e
end
require_or_skip "active_support/core_ext/object/json"
if exception
assert_raises_with_message JSON::GeneratorError, e.message do
JSON.generate(subject, quirks_mode: true)
end
else
assert_equal expected, JSON.generate(subject, quirks_mode: true)
end
end
def assert_raises_with_message(exception_class, message, &block)
err = assert_raises(exception_class) { block.call }
assert_match message, err.message
end
end
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