require File.dirname(__FILE__) + '/helper'

class CacheTest < ActiveSupport::TestCase

  context "Cache" do
    setup do
      @cache = Kasket::Cache.new
    end

    context "reading" do

      should "work with non collection values" do
        @cache.write('key', 'value')
        assert_equal 'value', @cache.read('key')
      end

      should "fetch original results of stored collections" do
        @cache.write('key1', 'value1')
        @cache.write('key2', 'value2')
        @cache.write('key3', 'value3')
        @cache.write('collection_key', [ 'key1', 'key2', 'key3'])

        assert_equal [ 'value1', 'value2', 'value3'], @cache.read('collection_key')
      end

      should "not impact original object" do
        record = { 'id' => 1, 'color' => 'red' }
        @cache.write('key', record)
        record['id'] = 2

        assert_not_equal record, @cache.read('key')
      end

    end

    context "writing" do
      setup do
        @cache.write('key', 'value')
      end

      should "store the object locally" do
        assert_equal 'value', @cache.local['key']
      end

      should "persist the object" do
        @cache.clear_local
        assert_equal 'value', @cache.read('key')
      end

      should "respect max collection size" do
        original_max = Kasket::CONFIGURATION[:max_collection_size]
        Kasket::CONFIGURATION[:max_collection_size] = 2

        @cache.write('key', [ 'a', 'b'])
        assert_equal 2, @cache.read('key').size

        @cache.write('key2', ['a', 'b', 'c'])
        assert_equal nil, @cache.read('key2')

        Kasket::CONFIGURATION[:max_collection_size] = original_max
      end

    end

    should "delete" do
      @cache.write('key', 'value')
      @cache.delete('key')

      assert_equal nil, @cache.local['key']
      assert_equal nil, @cache.read('key')
    end

    should "delete matched local" do
      @cache.write('key1', 'value1')
      @cache.write('key2', 'value2')
      @cache.delete_matched_local(/2/)

      assert_equal nil, @cache.local['key2']
      assert_equal 'value1', @cache.local['key1']
      assert_equal 'value2', @cache.read('key2')
    end

    should "delete local" do
      @cache.write('key1', 'value1')
      @cache.write('key2', 'value2')
      @cache.delete_local('key1', 'key2')

      assert_equal nil, @cache.local['key1']
      assert_equal nil, @cache.local['key2']
      assert_equal 'value1', @cache.read('key1')
      assert_equal 'value2', @cache.read('key2')
    end

    should "clear local" do
      @cache.write('key1', 'value1')
      @cache.clear_local

      assert @cache.local.blank?
    end

  end
end