path: root/activesupport/test/caching_test.rb

require "logger"
require "abstract_unit"
require "active_support/cache"
require "dependencies_test_helpers"

require "pathname"

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

class CacheKeyTest < ActiveSupport::TestCase
  def test_entry_legacy_optional_ivars
    legacy = Class.new(ActiveSupport::Cache::Entry) do
      def initialize(value, options = {})
        @value = value
        @expires_in = nil
        @created_at = nil
        super
      end
    end

    entry = legacy.new "foo"
    assert_equal "foo", entry.value
  end

  def test_expand_cache_key
    assert_equal "1/2/true", ActiveSupport::Cache.expand_cache_key([1, "2", true])
    assert_equal "name/1/2/true", ActiveSupport::Cache.expand_cache_key([1, "2", true], :name)
  end

  def test_expand_cache_key_with_rails_cache_id
    with_env("RAILS_CACHE_ID" => "c99") do
      assert_equal "c99/foo", ActiveSupport::Cache.expand_cache_key(:foo)
      assert_equal "c99/foo", ActiveSupport::Cache.expand_cache_key([:foo])
      assert_equal "c99/foo/bar", ActiveSupport::Cache.expand_cache_key([:foo, :bar])
      assert_equal "nm/c99/foo", ActiveSupport::Cache.expand_cache_key(:foo, :nm)
      assert_equal "nm/c99/foo", ActiveSupport::Cache.expand_cache_key([:foo], :nm)
      assert_equal "nm/c99/foo/bar", ActiveSupport::Cache.expand_cache_key([:foo, :bar], :nm)
    end
  end

  def test_expand_cache_key_with_rails_app_version
    with_env("RAILS_APP_VERSION" => "rails3") do
      assert_equal "rails3/foo", ActiveSupport::Cache.expand_cache_key(:foo)
    end
  end

  def test_expand_cache_key_rails_cache_id_should_win_over_rails_app_version
    with_env("RAILS_CACHE_ID" => "c99", "RAILS_APP_VERSION" => "rails3") do
      assert_equal "c99/foo", ActiveSupport::Cache.expand_cache_key(:foo)
    end
  end

  def test_expand_cache_key_respond_to_cache_key
    key = "foo"
    def key.cache_key
      :foo_key
    end
    assert_equal "foo_key", ActiveSupport::Cache.expand_cache_key(key)
  end

  def test_expand_cache_key_array_with_something_that_responds_to_cache_key
    key = "foo"
    def key.cache_key
      :foo_key
    end
    assert_equal "foo_key", ActiveSupport::Cache.expand_cache_key([key])
  end

  def test_expand_cache_key_of_nil
    assert_equal "", ActiveSupport::Cache.expand_cache_key(nil)
  end

  def test_expand_cache_key_of_false
    assert_equal "false", ActiveSupport::Cache.expand_cache_key(false)
  end

  def test_expand_cache_key_of_true
    assert_equal "true", ActiveSupport::Cache.expand_cache_key(true)
  end

  def test_expand_cache_key_of_array_like_object
    assert_equal "foo/bar/baz", ActiveSupport::Cache.expand_cache_key(%w{foo bar baz}.to_enum)
  end

  private

    def with_env(kv)
      old_values = {}
      kv.each { |key, value| old_values[key], ENV[key] = ENV[key], value }
      yield
    ensure
      old_values.each { |key, value| ENV[key] = value }
    end
end

class CacheStoreSettingTest < ActiveSupport::TestCase
  def test_memory_store_gets_created_if_no_arguments_passed_to_lookup_store_method
    store = ActiveSupport::Cache.lookup_store
    assert_kind_of(ActiveSupport::Cache::MemoryStore, store)
  end

  def test_memory_store
    store = ActiveSupport::Cache.lookup_store :memory_store
    assert_kind_of(ActiveSupport::Cache::MemoryStore, store)
  end

  def test_file_fragment_cache_store
    store = ActiveSupport::Cache.lookup_store :file_store, "/path/to/cache/directory"
    assert_kind_of(ActiveSupport::Cache::FileStore, store)
    assert_equal "/path/to/cache/directory", store.cache_path
  end

  def test_mem_cache_fragment_cache_store
    assert_called_with(Dalli::Client, :new, [%w[localhost], {}]) do
      store = ActiveSupport::Cache.lookup_store :mem_cache_store, "localhost"
      assert_kind_of(ActiveSupport::Cache::MemCacheStore, store)
    end
  end

  def test_mem_cache_fragment_cache_store_with_given_mem_cache
    mem_cache = Dalli::Client.new
    assert_not_called(Dalli::Client, :new) do
      store = ActiveSupport::Cache.lookup_store :mem_cache_store, mem_cache
      assert_kind_of(ActiveSupport::Cache::MemCacheStore, store)
    end
  end

  def test_mem_cache_fragment_cache_store_with_not_dalli_client
    assert_not_called(Dalli::Client, :new) do
      memcache = Object.new
      assert_raises(ArgumentError) do
        ActiveSupport::Cache.lookup_store :mem_cache_store, memcache
      end
    end
  end

  def test_mem_cache_fragment_cache_store_with_multiple_servers
    assert_called_with(Dalli::Client, :new, [%w[localhost 192.168.1.1], {}]) do
      store = ActiveSupport::Cache.lookup_store :mem_cache_store, "localhost", "192.168.1.1"
      assert_kind_of(ActiveSupport::Cache::MemCacheStore, store)
    end
  end

  def test_mem_cache_fragment_cache_store_with_options
    assert_called_with(Dalli::Client, :new, [%w[localhost 192.168.1.1], { timeout: 10 }]) do
      store = ActiveSupport::Cache.lookup_store :mem_cache_store, "localhost", "192.168.1.1", namespace: "foo", timeout: 10
      assert_kind_of(ActiveSupport::Cache::MemCacheStore, store)
      assert_equal "foo", store.options[:namespace]
    end
  end

  def test_object_assigned_fragment_cache_store
    store = ActiveSupport::Cache.lookup_store ActiveSupport::Cache::FileStore.new("/path/to/cache/directory")
    assert_kind_of(ActiveSupport::Cache::FileStore, store)
    assert_equal "/path/to/cache/directory", store.cache_path
  end
end

class CacheStoreNamespaceTest < ActiveSupport::TestCase
  def test_static_namespace
    cache = ActiveSupport::Cache.lookup_store(:memory_store, namespace: "tester")
    cache.write("foo", "bar")
    assert_equal "bar", cache.read("foo")
    assert_equal "bar", cache.instance_variable_get(:@data)["tester:foo"].value
  end

  def test_proc_namespace
    test_val = "tester"
    proc = lambda { test_val }
    cache = ActiveSupport::Cache.lookup_store(:memory_store, namespace: proc)
    cache.write("foo", "bar")
    assert_equal "bar", cache.read("foo")
    assert_equal "bar", cache.instance_variable_get(:@data)["tester:foo"].value
  end

  def test_delete_matched_key_start
    cache = ActiveSupport::Cache.lookup_store(:memory_store, namespace: "tester")
    cache.write("foo", "bar")
    cache.write("fu", "baz")
    cache.delete_matched(/^fo/)
    assert !cache.exist?("foo")
    assert cache.exist?("fu")
  end

  def test_delete_matched_key
    cache = ActiveSupport::Cache.lookup_store(:memory_store, namespace: "foo")
    cache.write("foo", "bar")
    cache.write("fu", "baz")
    cache.delete_matched(/OO/i)
    assert !cache.exist?("foo")
    assert cache.exist?("fu")
  end
end

# Tests the base functionality that should be identical across all cache stores.
module CacheStoreBehavior
  def test_should_read_and_write_strings
    assert @cache.write("foo", "bar")
    assert_equal "bar", @cache.read("foo")
  end

  def test_should_overwrite
    @cache.write("foo", "bar")
    @cache.write("foo", "baz")
    assert_equal "baz", @cache.read("foo")
  end

  def test_fetch_without_cache_miss
    @cache.write("foo", "bar")
    assert_not_called(@cache, :write) do
      assert_equal "bar", @cache.fetch("foo") { "baz" }
    end
  end

  def test_fetch_with_cache_miss
    assert_called_with(@cache, :write, ["foo", "baz", @cache.options]) do
      assert_equal "baz", @cache.fetch("foo") { "baz" }
    end
  end

  def test_fetch_with_cache_miss_passes_key_to_block
    cache_miss = false
    assert_equal 3, @cache.fetch("foo") { |key| cache_miss = true; key.length }
    assert cache_miss

    cache_miss = false
    assert_equal 3, @cache.fetch("foo") { |key| cache_miss = true; key.length }
    assert !cache_miss
  end

  def test_fetch_with_forced_cache_miss
    @cache.write("foo", "bar")
    assert_not_called(@cache, :read) do
      assert_called_with(@cache, :write, ["foo", "bar", @cache.options.merge(force: true)]) do
        @cache.fetch("foo", force: true) { "bar" }
      end
    end
  end

  def test_fetch_with_cached_nil
    @cache.write("foo", nil)
    assert_not_called(@cache, :write) do
      assert_nil @cache.fetch("foo") { "baz" }
    end
  end

  def test_fetch_with_forced_cache_miss_with_block
    @cache.write("foo", "bar")
    assert_equal "foo_bar", @cache.fetch("foo", force: true) { "foo_bar" }
  end

  def test_fetch_with_forced_cache_miss_without_block
    @cache.write("foo", "bar")
    assert_raises(ArgumentError) do
      @cache.fetch("foo", force: true)
    end

    assert_equal "bar", @cache.read("foo")
  end

  def test_should_read_and_write_hash
    assert @cache.write("foo", a: "b")
    assert_equal({ a: "b" }, @cache.read("foo"))
  end

  def test_should_read_and_write_integer
    assert @cache.write("foo", 1)
    assert_equal 1, @cache.read("foo")
  end

  def test_should_read_and_write_nil
    assert @cache.write("foo", nil)
    assert_nil @cache.read("foo")
  end

  def test_should_read_and_write_false
    assert @cache.write("foo", false)
    assert_equal false, @cache.read("foo")
  end

  def test_read_multi
    @cache.write("foo", "bar")
    @cache.write("fu", "baz")
    @cache.write("fud", "biz")
    assert_equal({ "foo" => "bar", "fu" => "baz" }, @cache.read_multi("foo", "fu"))
  end

  def test_read_multi_with_expires
    time = Time.now
    @cache.write("foo", "bar", expires_in: 10)
    @cache.write("fu", "baz")
    @cache.write("fud", "biz")
    Time.stub(:now, time + 11) do
      assert_equal({ "fu" => "baz" }, @cache.read_multi("foo", "fu"))
    end
  end

  def test_fetch_multi
    @cache.write("foo", "bar")
    @cache.write("fud", "biz")

    values = @cache.fetch_multi("foo", "fu", "fud") { |value| value * 2 }

    assert_equal({ "foo" => "bar", "fu" => "fufu", "fud" => "biz" }, values)
    assert_equal("fufu", @cache.read("fu"))
  end

  def test_multi_with_objects
    cache_struct = Struct.new(:cache_key, :title)
    foo = cache_struct.new("foo", "FOO!")
    bar = cache_struct.new("bar")

    @cache.write("bar", "BAM!")

    values = @cache.fetch_multi(foo, bar) { |object| object.title }

    assert_equal({ foo => "FOO!", bar => "BAM!" }, values)
  end

  def test_fetch_multi_without_block
    assert_raises(ArgumentError) do
      @cache.fetch_multi("foo")
    end
  end

  def test_read_and_write_compressed_small_data
    @cache.write("foo", "bar", compress: true)
    assert_equal "bar", @cache.read("foo")
  end

  def test_read_and_write_compressed_large_data
    @cache.write("foo", "bar", compress: true, compress_threshold: 2)
    assert_equal "bar", @cache.read("foo")
  end

  def test_read_and_write_compressed_nil
    @cache.write("foo", nil, compress: true)
    assert_nil @cache.read("foo")
  end

  def test_cache_key
    obj = Object.new
    def obj.cache_key
      :foo
    end
    @cache.write(obj, "bar")
    assert_equal "bar", @cache.read("foo")
  end

  def test_param_as_cache_key
    obj = Object.new
    def obj.to_param
      "foo"
    end
    @cache.write(obj, "bar")
    assert_equal "bar", @cache.read("foo")
  end

  def test_array_as_cache_key
    @cache.write([:fu, "foo"], "bar")
    assert_equal "bar", @cache.read("fu/foo")
  end

  def test_hash_as_cache_key
    @cache.write({ foo: 1, fu: 2 }, "bar")
    assert_equal "bar", @cache.read("foo=1/fu=2")
  end

  def test_keys_are_case_sensitive
    @cache.write("foo", "bar")
    assert_nil @cache.read("FOO")
  end

  def test_exist
    @cache.write("foo", "bar")
    assert_equal true, @cache.exist?("foo")
    assert_equal false, @cache.exist?("bar")
  end

  def test_nil_exist
    @cache.write("foo", nil)
    assert @cache.exist?("foo")
  end

  def test_delete
    @cache.write("foo", "bar")
    assert @cache.exist?("foo")
    assert @cache.delete("foo")
    assert !@cache.exist?("foo")
  end

  def test_original_store_objects_should_not_be_immutable
    bar = "bar"
    @cache.write("foo", bar)
    assert_nothing_raised { bar.gsub!(/.*/, "baz") }
  end

  def test_expires_in
    time = Time.local(2008, 4, 24)

    Time.stub(:now, time) do
      @cache.write("foo", "bar")
      assert_equal "bar", @cache.read("foo")
    end

    Time.stub(:now, time + 30) do
      assert_equal "bar", @cache.read("foo")
    end

    Time.stub(:now, time + 61) do
      assert_nil @cache.read("foo")
    end
  end

  def test_race_condition_protection_skipped_if_not_defined
    @cache.write("foo", "bar")
    time = @cache.send(:read_entry, @cache.send(:normalize_key, "foo", {}), {}).expires_at

    Time.stub(:now, Time.at(time)) do
      result = @cache.fetch("foo") do
        assert_nil @cache.read("foo")
        "baz"
      end
      assert_equal "baz", result
    end
  end

  def test_race_condition_protection_is_limited
    time = Time.now
    @cache.write("foo", "bar", expires_in: 60)
    Time.stub(:now, time + 71) do
      result = @cache.fetch("foo", race_condition_ttl: 10) do
        assert_nil @cache.read("foo")
        "baz"
      end
      assert_equal "baz", result
    end
  end

  def test_race_condition_protection_is_safe
    time = Time.now
    @cache.write("foo", "bar", expires_in: 60)
    Time.stub(:now, time + 61) do
      begin
        @cache.fetch("foo", race_condition_ttl: 10) do
          assert_equal "bar", @cache.read("foo")
          raise ArgumentError.new
        end
      rescue ArgumentError
      end
      assert_equal "bar", @cache.read("foo")
    end
    Time.stub(:now, time + 91) do
      assert_nil @cache.read("foo")
    end
  end

  def test_race_condition_protection
    time = Time.now
    @cache.write("foo", "bar", expires_in: 60)
    Time.stub(:now, time + 61) do
      result = @cache.fetch("foo", race_condition_ttl: 10) do
        assert_equal "bar", @cache.read("foo")
        "baz"
      end
      assert_equal "baz", result
    end
  end

  def test_crazy_key_characters
    crazy_key = "#/:*(<+=> )&$%@?;'\"\'`~-"
    assert @cache.write(crazy_key, "1", raw: true)
    assert_equal "1", @cache.read(crazy_key)
    assert_equal "1", @cache.fetch(crazy_key)
    assert @cache.delete(crazy_key)
    assert_equal "2", @cache.fetch(crazy_key, raw: true) { "2" }
    assert_equal 3, @cache.increment(crazy_key)
    assert_equal 2, @cache.decrement(crazy_key)
  end

  def test_really_long_keys
    key = ""
    900.times { key << "x" }
    assert @cache.write(key, "bar")
    assert_equal "bar", @cache.read(key)
    assert_equal "bar", @cache.fetch(key)
    assert_nil @cache.read("#{key}x")
    assert_equal({ key => "bar" }, @cache.read_multi(key))
    assert @cache.delete(key)
  end

  def test_cache_hit_instrumentation
    key = "test_key"
    @events = []
    ActiveSupport::Notifications.subscribe "cache_read.active_support" do |*args|
      @events << ActiveSupport::Notifications::Event.new(*args)
    end
    assert @cache.write(key, "1", raw: true)
    assert @cache.fetch(key) {}
    assert_equal 1, @events.length
    assert_equal "cache_read.active_support", @events[0].name
    assert_equal :fetch, @events[0].payload[:super_operation]
    assert @events[0].payload[:hit]
  ensure
    ActiveSupport::Notifications.unsubscribe "cache_read.active_support"
  end

  def test_cache_miss_instrumentation
    @events = []
    ActiveSupport::Notifications.subscribe(/^cache_(.*)\.active_support$/) do |*args|
      @events << ActiveSupport::Notifications::Event.new(*args)
    end
    assert_not @cache.fetch("bad_key") {}
    assert_equal 3, @events.length
    assert_equal "cache_read.active_support", @events[0].name
    assert_equal "cache_generate.active_support", @events[1].name
    assert_equal "cache_write.active_support", @events[2].name
    assert_equal :fetch, @events[0].payload[:super_operation]
    assert_not @events[0].payload[:hit]
  ensure
    ActiveSupport::Notifications.unsubscribe "cache_read.active_support"
  end
end

module CacheStoreVersionBehavior
  ModelWithKeyAndVersion = Struct.new(:cache_key, :cache_version)

  def test_fetch_with_right_version_should_hit
    @cache.fetch("foo", version: 1) { "bar" }
    assert_equal "bar", @cache.read("foo", version: 1)
  end

  def test_fetch_with_wrong_version_should_miss
    @cache.fetch("foo", version: 1) { "bar" }
    assert_nil @cache.read("foo", version: 2)
  end

  def test_read_with_right_version_should_hit
    @cache.write("foo", "bar", version: 1)
    assert_equal "bar", @cache.read("foo", version: 1)
  end

  def test_read_with_wrong_version_should_miss
    @cache.write("foo", "bar", version: 1)
    assert_nil @cache.read("foo", version: 2)
  end

  def test_exist_with_right_version_should_be_true
    @cache.write("foo", "bar", version: 1)
    assert @cache.exist?("foo", version: 1)
  end

  def test_exist_with_wrong_version_should_be_false
    @cache.write("foo", "bar", version: 1)
    assert !@cache.exist?("foo", version: 2)
  end

  def test_reading_and_writing_with_model_supporting_cache_version
    m1v1 = ModelWithKeyAndVersion.new("model/1", 1)
    m1v2 = ModelWithKeyAndVersion.new("model/1", 2)

    @cache.write(m1v1, "bar")
    assert_equal "bar", @cache.read(m1v1)
    assert_nil @cache.read(m1v2)
  end

  def test_reading_and_writing_with_model_supporting_cache_version_using_nested_key
    m1v1 = ModelWithKeyAndVersion.new("model/1", 1)
    m1v2 = ModelWithKeyAndVersion.new("model/1", 2)

    @cache.write([ "something", m1v1 ], "bar")
    assert_equal "bar", @cache.read([ "something", m1v1 ])
    assert_nil @cache.read([ "something", m1v2 ])
  end

  def test_fetching_with_model_supporting_cache_version
    m1v1 = ModelWithKeyAndVersion.new("model/1", 1)
    m1v2 = ModelWithKeyAndVersion.new("model/1", 2)

    @cache.fetch(m1v1) { "bar" }
    assert_equal "bar", @cache.fetch(m1v1) { "bu" }
    assert_equal "bu", @cache.fetch(m1v2) { "bu" }
  end

  def test_exist_with_model_supporting_cache_version
    m1v1 = ModelWithKeyAndVersion.new("model/1", 1)
    m1v2 = ModelWithKeyAndVersion.new("model/1", 2)

    @cache.write(m1v1, "bar")
    assert     @cache.exist?(m1v1)
    assert_not @cache.fetch(m1v2)
  end

  def test_fetch_multi_with_model_supporting_cache_version
    m1v1 = ModelWithKeyAndVersion.new("model/1", 1)
    m2v1 = ModelWithKeyAndVersion.new("model/2", 1)
    m2v2 = ModelWithKeyAndVersion.new("model/2", 2)

    first_fetch_values  = @cache.fetch_multi(m1v1, m2v1) { |m| m.cache_key }
    second_fetch_values = @cache.fetch_multi(m1v1, m2v2) { |m| m.cache_key + " 2nd" }

    assert_equal({ m1v1 => "model/1", m2v1 => "model/2" }, first_fetch_values)
    assert_equal({ m1v1 => "model/1", m2v2 => "model/2 2nd" }, second_fetch_values)
  end

  def test_version_is_normalized
    @cache.write("foo", "bar", version: 1)
    assert_equal "bar", @cache.read("foo", version: "1")
  end
end

# https://rails.lighthouseapp.com/projects/8994/tickets/6225-memcachestore-cant-deal-with-umlauts-and-special-characters
# The error is caused by character encodings that can't be compared with ASCII-8BIT regular expressions and by special
# characters like the umlaut in UTF-8.
module EncodedKeyCacheBehavior
  Encoding.list.each do |encoding|
    define_method "test_#{encoding.name.underscore}_encoded_values" do
      key = "foo".force_encoding(encoding)
      assert @cache.write(key, "1", raw: true)
      assert_equal "1", @cache.read(key)
      assert_equal "1", @cache.fetch(key)
      assert @cache.delete(key)
      assert_equal "2", @cache.fetch(key, raw: true) { "2" }
      assert_equal 3, @cache.increment(key)
      assert_equal 2, @cache.decrement(key)
    end
  end

  def test_common_utf8_values
    key = "\xC3\xBCmlaut".force_encoding(Encoding::UTF_8)
    assert @cache.write(key, "1", raw: true)
    assert_equal "1", @cache.read(key)
    assert_equal "1", @cache.fetch(key)
    assert @cache.delete(key)
    assert_equal "2", @cache.fetch(key, raw: true) { "2" }
    assert_equal 3, @cache.increment(key)
    assert_equal 2, @cache.decrement(key)
  end

  def test_retains_encoding
    key = "\xC3\xBCmlaut".force_encoding(Encoding::UTF_8)
    assert @cache.write(key, "1", raw: true)
    assert_equal Encoding::UTF_8, key.encoding
  end
end

module CacheDeleteMatchedBehavior
  def test_delete_matched
    @cache.write("foo", "bar")
    @cache.write("fu", "baz")
    @cache.write("foo/bar", "baz")
    @cache.write("fu/baz", "bar")
    @cache.delete_matched(/oo/)
    assert !@cache.exist?("foo")
    assert @cache.exist?("fu")
    assert !@cache.exist?("foo/bar")
    assert @cache.exist?("fu/baz")
  end
end

module CacheIncrementDecrementBehavior
  def test_increment
    @cache.write("foo", 1, raw: true)
    assert_equal 1, @cache.read("foo").to_i
    assert_equal 2, @cache.increment("foo")
    assert_equal 2, @cache.read("foo").to_i
    assert_equal 3, @cache.increment("foo")
    assert_equal 3, @cache.read("foo").to_i
    assert_nil @cache.increment("bar")
  end

  def test_decrement
    @cache.write("foo", 3, raw: true)
    assert_equal 3, @cache.read("foo").to_i
    assert_equal 2, @cache.decrement("foo")
    assert_equal 2, @cache.read("foo").to_i
    assert_equal 1, @cache.decrement("foo")
    assert_equal 1, @cache.read("foo").to_i
    assert_nil @cache.decrement("bar")
  end
end

module LocalCacheBehavior
  def test_local_writes_are_persistent_on_the_remote_cache
    retval = @cache.with_local_cache do
      @cache.write("foo", "bar")
    end
    assert retval
    assert_equal "bar", @cache.read("foo")
  end

  def test_clear_also_clears_local_cache
    @cache.with_local_cache do
      @cache.write("foo", "bar")
      @cache.clear
      assert_nil @cache.read("foo")
    end

    assert_nil @cache.read("foo")
  end

  def test_local_cache_of_write
    @cache.with_local_cache do
      @cache.write("foo", "bar")
      @peek.delete("foo")
      assert_equal "bar", @cache.read("foo")
    end
  end

  def test_local_cache_of_read
    @cache.write("foo", "bar")
    @cache.with_local_cache do
      assert_equal "bar", @cache.read("foo")
    end
  end

  def test_local_cache_of_read_nil
    @cache.with_local_cache do
      assert_nil @cache.read("foo")
      @cache.send(:bypass_local_cache) { @cache.write "foo", "bar" }
      assert_nil @cache.read("foo")
    end
  end

  def test_local_cache_fetch
    @cache.with_local_cache do
      @cache.send(:local_cache).write "foo", "bar"
      assert_equal "bar", @cache.send(:local_cache).fetch("foo")
    end
  end

  def test_local_cache_of_write_nil
    @cache.with_local_cache do
      assert @cache.write("foo", nil)
      assert_nil @cache.read("foo")
      @peek.write("foo", "bar")
      assert_nil @cache.read("foo")
    end
  end

  def test_local_cache_of_write_with_unless_exist
    @cache.with_local_cache do
      @cache.write("foo", "bar")
      @cache.write("foo", "baz", unless_exist: true)
      assert_equal @peek.read("foo"), @cache.read("foo")
    end
  end

  def test_local_cache_of_delete
    @cache.with_local_cache do
      @cache.write("foo", "bar")
      @cache.delete("foo")
      assert_nil @cache.read("foo")
    end
  end

  def test_local_cache_of_exist
    @cache.with_local_cache do
      @cache.write("foo", "bar")
      @peek.delete("foo")
      assert @cache.exist?("foo")
    end
  end

  def test_local_cache_of_increment
    @cache.with_local_cache do
      @cache.write("foo", 1, raw: true)
      @peek.write("foo", 2, raw: true)
      @cache.increment("foo")
      assert_equal 3, @cache.read("foo")
    end
  end

  def test_local_cache_of_decrement
    @cache.with_local_cache do
      @cache.write("foo", 1, raw: true)
      @peek.write("foo", 3, raw: true)
      @cache.decrement("foo")
      assert_equal 2, @cache.read("foo")
    end
  end

  def test_middleware
    app = lambda { |env|
      result = @cache.write("foo", "bar")
      assert_equal "bar", @cache.read("foo") # make sure 'foo' was written
      assert result
      [200, {}, []]
    }
    app = @cache.middleware.new(app)
    app.call({})
  end
end

module AutoloadingCacheBehavior
  include DependenciesTestHelpers
  def test_simple_autoloading
    with_autoloading_fixtures do
      @cache.write("foo", EM.new)
    end

    remove_constants(:EM)
    ActiveSupport::Dependencies.clear

    with_autoloading_fixtures do
      assert_kind_of EM, @cache.read("foo")
    end

    remove_constants(:EM)
    ActiveSupport::Dependencies.clear
  end

  def test_two_classes_autoloading
    with_autoloading_fixtures do
      @cache.write("foo", [EM.new, ClassFolder.new])
    end

    remove_constants(:EM, :ClassFolder)
    ActiveSupport::Dependencies.clear

    with_autoloading_fixtures do
      loaded = @cache.read("foo")
      assert_kind_of Array, loaded
      assert_equal 2, loaded.size
      assert_kind_of EM, loaded[0]
      assert_kind_of ClassFolder, loaded[1]
    end

    remove_constants(:EM, :ClassFolder)
    ActiveSupport::Dependencies.clear
  end
end

class FileStoreTest < ActiveSupport::TestCase
  def setup
    Dir.mkdir(cache_dir) unless File.exist?(cache_dir)
    @cache = ActiveSupport::Cache.lookup_store(:file_store, cache_dir, expires_in: 60)
    @peek = ActiveSupport::Cache.lookup_store(:file_store, cache_dir, expires_in: 60)
    @cache_with_pathname = ActiveSupport::Cache.lookup_store(:file_store, Pathname.new(cache_dir), expires_in: 60)

    @buffer = StringIO.new
    @cache.logger = ActiveSupport::Logger.new(@buffer)
  end

  def teardown
    FileUtils.rm_r(cache_dir)
  rescue Errno::ENOENT
  end

  def cache_dir
    File.join(Dir.pwd, "tmp_cache")
  end

  include CacheStoreBehavior
  include CacheStoreVersionBehavior
  include LocalCacheBehavior
  include CacheDeleteMatchedBehavior
  include CacheIncrementDecrementBehavior
  include AutoloadingCacheBehavior

  def test_clear
    gitkeep = File.join(cache_dir, ".gitkeep")
    keep = File.join(cache_dir, ".keep")
    FileUtils.touch([gitkeep, keep])
    @cache.clear
    assert File.exist?(gitkeep)
    assert File.exist?(keep)
  end

  def test_clear_without_cache_dir
    FileUtils.rm_r(cache_dir)
    @cache.clear
  end

  def test_long_uri_encoded_keys
    @cache.write("%" * 870, 1)
    assert_equal 1, @cache.read("%" * 870)
  end

  def test_key_transformation
    key = @cache.send(:normalize_key, "views/index?id=1", {})
    assert_equal "views/index?id=1", @cache.send(:file_path_key, key)
  end

  def test_key_transformation_with_pathname
    FileUtils.touch(File.join(cache_dir, "foo"))
    key = @cache_with_pathname.send(:normalize_key, "views/index?id=1", {})
    assert_equal "views/index?id=1", @cache_with_pathname.send(:file_path_key, key)
  end

  # Test that generated cache keys are short enough to have Tempfile stuff added to them and
  # remain valid
  def test_filename_max_size
    key = "#{'A' * ActiveSupport::Cache::FileStore::FILENAME_MAX_SIZE}"
    path = @cache.send(:normalize_key, key, {})
    Dir::Tmpname.create(path) do |tmpname, n, opts|
      assert File.basename(tmpname + ".lock").length <= 255, "Temp filename too long: #{File.basename(tmpname + '.lock').length}"
    end
  end

  # Because file systems have a maximum filename size, filenames > max size should be split in to directories
  # If filename is 'AAAAB', where max size is 4, the returned path should be AAAA/B
  def test_key_transformation_max_filename_size
    key = "#{'A' * ActiveSupport::Cache::FileStore::FILENAME_MAX_SIZE}B"
    path = @cache.send(:normalize_key, key, {})
    assert path.split("/").all? { |dir_name| dir_name.size <= ActiveSupport::Cache::FileStore::FILENAME_MAX_SIZE }
    assert_equal "B", File.basename(path)
  end

  # If nothing has been stored in the cache, there is a chance the cache directory does not yet exist
  # Ensure delete_matched gracefully handles this case
  def test_delete_matched_when_cache_directory_does_not_exist
    assert_nothing_raised do
      ActiveSupport::Cache::FileStore.new("/test/cache/directory").delete_matched(/does_not_exist/)
    end
  end

  def test_delete_does_not_delete_empty_parent_dir
    sub_cache_dir = File.join(cache_dir, "subdir/")
    sub_cache_store = ActiveSupport::Cache::FileStore.new(sub_cache_dir)
    assert_nothing_raised do
      assert sub_cache_store.write("foo", "bar")
      assert sub_cache_store.delete("foo")
    end
    assert File.exist?(cache_dir), "Parent of top level cache dir was deleted!"
    assert File.exist?(sub_cache_dir), "Top level cache dir was deleted!"
    assert Dir.entries(sub_cache_dir).reject { |f| ActiveSupport::Cache::FileStore::EXCLUDED_DIRS.include?(f) }.empty?
  end

  def test_log_exception_when_cache_read_fails
    File.stub(:exist?, -> { raise StandardError.new("failed") }) do
      @cache.send(:read_entry, "winston", {})
      assert @buffer.string.present?
    end
  end

  def test_cleanup_removes_all_expired_entries
    time = Time.now
    @cache.write("foo", "bar", expires_in: 10)
    @cache.write("baz", "qux")
    @cache.write("quux", "corge", expires_in: 20)
    Time.stub(:now, time + 15) do
      @cache.cleanup
      assert_not @cache.exist?("foo")
      assert @cache.exist?("baz")
      assert @cache.exist?("quux")
    end
  end

  def test_write_with_unless_exist
    assert_equal true, @cache.write(1, "aaaaaaaaaa")
    assert_equal false, @cache.write(1, "aaaaaaaaaa", unless_exist: true)
    @cache.write(1, nil)
    assert_equal false, @cache.write(1, "aaaaaaaaaa", unless_exist: true)
  end
end

class MemoryStoreTest < ActiveSupport::TestCase
  def setup
    @record_size = ActiveSupport::Cache.lookup_store(:memory_store).send(:cached_size, 1, ActiveSupport::Cache::Entry.new("aaaaaaaaaa"))
    @cache = ActiveSupport::Cache.lookup_store(:memory_store, expires_in: 60, size: @record_size * 10 + 1)
  end

  include CacheStoreBehavior
  include CacheStoreVersionBehavior
  include CacheDeleteMatchedBehavior
  include CacheIncrementDecrementBehavior

  def test_prune_size
    @cache.write(1, "aaaaaaaaaa") && sleep(0.001)
    @cache.write(2, "bbbbbbbbbb") && sleep(0.001)
    @cache.write(3, "cccccccccc") && sleep(0.001)
    @cache.write(4, "dddddddddd") && sleep(0.001)
    @cache.write(5, "eeeeeeeeee") && sleep(0.001)
    @cache.read(2) && sleep(0.001)
    @cache.read(4)
    @cache.prune(@record_size * 3)
    assert @cache.exist?(5)
    assert @cache.exist?(4)
    assert !@cache.exist?(3), "no entry"
    assert @cache.exist?(2)
    assert !@cache.exist?(1), "no entry"
  end

  def test_prune_size_on_write
    @cache.write(1, "aaaaaaaaaa") && sleep(0.001)
    @cache.write(2, "bbbbbbbbbb") && sleep(0.001)
    @cache.write(3, "cccccccccc") && sleep(0.001)
    @cache.write(4, "dddddddddd") && sleep(0.001)
    @cache.write(5, "eeeeeeeeee") && sleep(0.001)
    @cache.write(6, "ffffffffff") && sleep(0.001)
    @cache.write(7, "gggggggggg") && sleep(0.001)
    @cache.write(8, "hhhhhhhhhh") && sleep(0.001)
    @cache.write(9, "iiiiiiiiii") && sleep(0.001)
    @cache.write(10, "kkkkkkkkkk") && sleep(0.001)
    @cache.read(2) && sleep(0.001)
    @cache.read(4) && sleep(0.001)
    @cache.write(11, "llllllllll")
    assert @cache.exist?(11)
    assert @cache.exist?(10)
    assert @cache.exist?(9)
    assert @cache.exist?(8)
    assert @cache.exist?(7)
    assert !@cache.exist?(6), "no entry"
    assert !@cache.exist?(5), "no entry"
    assert @cache.exist?(4)
    assert !@cache.exist?(3), "no entry"
    assert @cache.exist?(2)
    assert !@cache.exist?(1), "no entry"
  end

  def test_prune_size_on_write_based_on_key_length
    @cache.write(1, "aaaaaaaaaa") && sleep(0.001)
    @cache.write(2, "bbbbbbbbbb") && sleep(0.001)
    @cache.write(3, "cccccccccc") && sleep(0.001)
    @cache.write(4, "dddddddddd") && sleep(0.001)
    @cache.write(5, "eeeeeeeeee") && sleep(0.001)
    @cache.write(6, "ffffffffff") && sleep(0.001)
    @cache.write(7, "gggggggggg") && sleep(0.001)
    @cache.write(8, "hhhhhhhhhh") && sleep(0.001)
    @cache.write(9, "iiiiiiiiii") && sleep(0.001)
    long_key = "*" * 2 * @record_size
    @cache.write(long_key, "llllllllll")
    assert @cache.exist?(long_key)
    assert @cache.exist?(9)
    assert @cache.exist?(8)
    assert @cache.exist?(7)
    assert @cache.exist?(6)
    assert !@cache.exist?(5), "no entry"
    assert !@cache.exist?(4), "no entry"
    assert !@cache.exist?(3), "no entry"
    assert !@cache.exist?(2), "no entry"
    assert !@cache.exist?(1), "no entry"
  end

  def test_pruning_is_capped_at_a_max_time
    def @cache.delete_entry(*args)
      sleep(0.01)
      super
    end
    @cache.write(1, "aaaaaaaaaa") && sleep(0.001)
    @cache.write(2, "bbbbbbbbbb") && sleep(0.001)
    @cache.write(3, "cccccccccc") && sleep(0.001)
    @cache.write(4, "dddddddddd") && sleep(0.001)
    @cache.write(5, "eeeeeeeeee") && sleep(0.001)
    @cache.prune(30, 0.001)
    assert @cache.exist?(5)
    assert @cache.exist?(4)
    assert @cache.exist?(3)
    assert @cache.exist?(2)
    assert !@cache.exist?(1)
  end

  def test_write_with_unless_exist
    assert_equal true, @cache.write(1, "aaaaaaaaaa")
    assert_equal false, @cache.write(1, "aaaaaaaaaa", unless_exist: true)
    @cache.write(1, nil)
    assert_equal false, @cache.write(1, "aaaaaaaaaa", unless_exist: true)
  end
end

class MemCacheStoreTest < ActiveSupport::TestCase
  require "dalli"

  begin
    ss = Dalli::Client.new("localhost:11211").stats
    raise Dalli::DalliError unless ss["localhost:11211"]

    MEMCACHE_UP = true
  rescue Dalli::DalliError
    $stderr.puts "Skipping memcached tests. Start memcached and try again."
    MEMCACHE_UP = false
  end

  def setup
    skip "memcache server is not up" unless MEMCACHE_UP

    @cache = ActiveSupport::Cache.lookup_store(:mem_cache_store, expires_in: 60)
    @peek = ActiveSupport::Cache.lookup_store(:mem_cache_store)
    @data = @cache.instance_variable_get(:@data)
    @cache.clear
    @cache.silence!
    @cache.logger = ActiveSupport::Logger.new("/dev/null")
  end

  include CacheStoreBehavior
  include CacheStoreVersionBehavior
  include LocalCacheBehavior
  include CacheIncrementDecrementBehavior
  include EncodedKeyCacheBehavior
  include AutoloadingCacheBehavior

  def test_raw_values
    cache = ActiveSupport::Cache.lookup_store(:mem_cache_store, raw: true)
    cache.clear
    cache.write("foo", 2)
    assert_equal "2", cache.read("foo")
  end

  def test_raw_values_with_marshal
    cache = ActiveSupport::Cache.lookup_store(:mem_cache_store, raw: true)
    cache.clear
    cache.write("foo", Marshal.dump([]))
    assert_equal [], cache.read("foo")
  end

  def test_local_cache_raw_values
    cache = ActiveSupport::Cache.lookup_store(:mem_cache_store, raw: true)
    cache.clear
    cache.with_local_cache do
      cache.write("foo", 2)
      assert_equal "2", cache.read("foo")
    end
  end

  def test_local_cache_raw_values_with_marshal
    cache = ActiveSupport::Cache.lookup_store(:mem_cache_store, raw: true)
    cache.clear
    cache.with_local_cache do
      cache.write("foo", Marshal.dump([]))
      assert_equal [], cache.read("foo")
    end
  end

  def test_read_should_return_a_different_object_id_each_time_it_is_called
    @cache.write("foo", "bar")
    value = @cache.read("foo")
    assert_not_equal value.object_id, @cache.read("foo").object_id
    value << "bingo"
    assert_not_equal value, @cache.read("foo")
  end
end

class NullStoreTest < ActiveSupport::TestCase
  def setup
    @cache = ActiveSupport::Cache.lookup_store(:null_store)
  end

  def test_clear
    @cache.clear
  end

  def test_cleanup
    @cache.cleanup
  end

  def test_write
    assert_equal true, @cache.write("name", "value")
  end

  def test_read
    @cache.write("name", "value")
    assert_nil @cache.read("name")
  end

  def test_delete
    @cache.write("name", "value")
    assert_equal false, @cache.delete("name")
  end

  def test_increment
    @cache.write("name", 1, raw: true)
    assert_nil @cache.increment("name")
  end

  def test_decrement
    @cache.write("name", 1, raw: true)
    assert_nil @cache.increment("name")
  end

  def test_delete_matched
    @cache.write("name", "value")
    @cache.delete_matched(/name/)
  end

  def test_local_store_strategy
    @cache.with_local_cache do
      @cache.write("name", "value")
      assert_equal "value", @cache.read("name")
      @cache.delete("name")
      assert_nil @cache.read("name")
      @cache.write("name", "value")
    end
    assert_nil @cache.read("name")
  end
end

class CacheStoreLoggerTest < ActiveSupport::TestCase
  def setup
    @cache = ActiveSupport::Cache.lookup_store(:memory_store)

    @buffer = StringIO.new
    @cache.logger = ActiveSupport::Logger.new(@buffer)
  end

  def test_logging
    @cache.fetch("foo") { "bar" }
    assert @buffer.string.present?
  end

  def test_log_with_string_namespace
    @cache.fetch("foo", namespace: "string_namespace") { "bar" }
    assert_match %r{string_namespace:foo}, @buffer.string
  end

  def test_log_with_proc_namespace
    proc = Proc.new do
      "proc_namespace"
    end
    @cache.fetch("foo", namespace: proc) { "bar" }
    assert_match %r{proc_namespace:foo}, @buffer.string
  end

  def test_mute_logging
    @cache.mute { @cache.fetch("foo") { "bar" } }
    assert @buffer.string.blank?
  end
end

class CacheEntryTest < ActiveSupport::TestCase
  def test_expired
    entry = ActiveSupport::Cache::Entry.new("value")
    assert !entry.expired?, "entry not expired"
    entry = ActiveSupport::Cache::Entry.new("value", expires_in: 60)
    assert !entry.expired?, "entry not expired"
    Time.stub(:now, Time.now + 61) do
      assert entry.expired?, "entry is expired"
    end
  end

  def test_compress_values
    value = "value" * 100
    entry = ActiveSupport::Cache::Entry.new(value, compress: true, compress_threshold: 1)
    assert_equal value, entry.value
    assert(value.bytesize > entry.size, "value is compressed")
  end

  def test_non_compress_values
    value = "value" * 100
    entry = ActiveSupport::Cache::Entry.new(value)
    assert_equal value, entry.value
    assert_equal value.bytesize, entry.size
  end
end