require "abstract_unit"
require "active_support/cache"

module ActiveSupport
  module Cache
    module Strategy
      module LocalCache
        class MiddlewareTest < ActiveSupport::TestCase
          def test_local_cache_cleared_on_close
            key = "super awesome key"
            assert_nil LocalCacheRegistry.cache_for key
            middleware = Middleware.new("<3", key).new(->(env) {
              assert LocalCacheRegistry.cache_for(key), "should have a cache"
              [200, {}, []]
            })
            _, _, body = middleware.call({})
            assert LocalCacheRegistry.cache_for(key), "should still have a cache"
            body.each {}
            assert LocalCacheRegistry.cache_for(key), "should still have a cache"
            body.close
            assert_nil LocalCacheRegistry.cache_for(key)
          end

          def test_local_cache_cleared_and_response_should_be_present_on_invalid_parameters_error
            key = "super awesome key"
            assert_nil LocalCacheRegistry.cache_for key
            middleware = Middleware.new("<3", key).new(->(env) {
              assert LocalCacheRegistry.cache_for(key), "should have a cache"
              raise Rack::Utils::InvalidParameterError
            })
            response = middleware.call({})
            assert response, "response should exist"
            assert_nil LocalCacheRegistry.cache_for(key)
          end

          def test_local_cache_cleared_on_exception
            key = "super awesome key"
            assert_nil LocalCacheRegistry.cache_for key
            middleware = Middleware.new("<3", key).new(->(env) {
              assert LocalCacheRegistry.cache_for(key), "should have a cache"
              raise
            })
            assert_raises(RuntimeError) { middleware.call({}) }
            assert_nil LocalCacheRegistry.cache_for(key)
          end

          def test_local_cache_cleared_on_throw
            key = "super awesome key"
            assert_nil LocalCacheRegistry.cache_for key
            middleware = Middleware.new("<3", key).new(->(env) {
              assert LocalCacheRegistry.cache_for(key), "should have a cache"
              throw :warden
            })
            assert_throws(:warden) { middleware.call({}) }
            assert_nil LocalCacheRegistry.cache_for(key)
          end
        end
      end
    end
  end
end