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require 'timecop'
class TTLCacheTest < CacheTest
def setup
Timecop.freeze(Time.now)
@c = LruRedux::TTL::Cache.new 3, 5 * 60
end
def teardown
Timecop.return
assert_equal true, @c.send(:valid?)
end
def test_ttl
assert_equal 300, @c.ttl
@c.ttl = 10 * 60
assert_equal 600, @c.ttl
end
# TTL tests using Timecop
def test_ttl_eviction_on_access
@c[:a] = 1
@c[:b] = 2
Timecop.freeze(Time.now + 330)
@c[:c] = 3
assert_equal([[:c, 3]], @c.to_a)
end
def test_ttl_eviction_on_expire
@c[:a] = 1
@c[:b] = 2
Timecop.freeze(Time.now + 330)
@c.expire
assert_equal([], @c.to_a)
end
def test_ttl_eviction_on_new_max_size
@c[:a] = 1
@c[:b] = 2
Timecop.freeze(Time.now + 330)
@c.max_size = 10
assert_equal([], @c.to_a)
end
def test_ttl_eviction_on_new_ttl
@c[:a] = 1
@c[:b] = 2
Timecop.freeze(Time.now + 330)
@c.ttl = 10 * 60
assert_equal([[:b, 2], [:a, 1]], @c.to_a)
@c.ttl = 2 * 60
assert_equal([], @c.to_a)
end
def test_ttl_precedence_over_lru
@c[:a] = 1
Timecop.freeze(Time.now + 60)
@c[:b] = 2
@c[:c] = 3
@c[:a]
assert_equal [[:a, 1], [:c, 3], [:b, 2]],
@c.to_a
Timecop.freeze(Time.now + 270)
@c[:d] = 4
assert_equal [[:d, 4], [:c, 3], [:b, 2]],
@c.to_a
end
end
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