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_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_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