#!/usr/bin/env ruby -w

require "test/unit"
require "xamplr"

class TestXampl < Test::Unit::TestCase

  def setup
    Xampl.disable_all_persisters
  end

  def test_lose_the_first
    cache = Xampl::XamplCache.new(10)
    assert(cache)

    cache['first'] = 'first'
    assert(cache['first'])

    10.times { | i |
      id = "id.#{i}"
      cache[id] = id
    }
    assert_nil(cache['first'])
  end

  def test_lose_the_second
    cache = Xampl::XamplCache.new(10)
    assert(cache)

    cache['first'] = 'first'
    cache['second'] = 'second'
    assert(cache['first'])
    assert(cache['second'])

    10.times { | i |
      id = "id.#{i}"
      cache[id] = id
      use_first = cache['first']
    }
    assert(cache['first'])
    assert_nil(cache['second'])
  end

  def test_lose_the_first_XamplCache
    cache = Xampl::XamplCache.new(10)
    assert(cache)

    assert_nil(cache['dummy'])

    cache['dummy'] = 'dummy'
    assert_equal(1, cache.size)
    cache.delete('dummy')
    assert_equal(0, cache.size)
    assert_nil(cache['dummy'])

    cache['first'] = 'first-value'
    assert(cache['first'])

    10.times { | i |
      key = "thing.#{i}"
      value = "value.#{i}"
      cache[key] = value
    }
    assert_nil(cache['first'])
  end

  def test_lose_the_second_XamplCache
    cache = Xampl::XamplCache.new(10)
    assert(cache)

    # fill the cache
    10.times { | i |
      id = "id.#{i}"
      cache[id] = id
      use_first = cache['first']
    }

    cache['first'] = 'first'
    cache['second'] = 'second'
    assert(cache['first'])
    assert(cache['second'])

    10.times { | i |
      use_first = cache['first']

      id = "id.#{10 + i}"
      cache[id] = id
    }

    assert(cache['first'])
    assert_nil(cache['second'])
  end

  def test_lose_the_first_XamplCacheLFU
    cache = Xampl::XamplCacheLFU.new(10)
    assert(cache)

    assert_nil(cache['dummy'])

    cache['dummy'] = 'dummy'
    assert_equal(1, cache.size)
    cache.delete('dummy')
    assert_equal(0, cache.size)
    assert_nil(cache['dummy'])

    cache['first'] = 'first-value'
    assert(cache['first'])
    cache.delete('first')
    assert_nil(cache['first'])
    cache['first'] = 'first-value'

    10.times { | i |
      key = "thing.#{i}"
      value = "value.#{i}"
      cache[key] = value
      thing = cache[key]
    }
    assert_nil(cache['first'])
  end

  def test_lose_the_second_XamplCacheLFU
    cache = Xampl::XamplCacheLFU.new(10)
    assert(cache)

    # fill the cache
    10.times { | i |
      id = "id.#{i}"
      cache[id] = id
      use_first = cache['first']
    }

    cache['first'] = 'first'
    cache['second'] = 'second'
    assert(cache['first'])
    assert(cache['second'])

    10.times { | i |
      use_first = cache['first']

      id = "id.#{10 + i}"
      cache[id] = id
    }

    assert(cache['first'])
    assert_nil(cache['second'])
  end
end