func (*suite) TestEvictOld(c *gc.C) {
// Test that evict removes entries even when they're
// in the old map.
now := time.Now()
p := cache.New(time.Minute)
// Populate the cache with an initial entry.
v, err := cache.GetAtTime(p, "a", fetchValue("a"), now)
c.Assert(err, gc.IsNil)
c.Assert(v, gc.Equals, "a")
c.Assert(p.Len(), gc.Equals, 1)
v, err = cache.GetAtTime(p, "b", fetchValue("b"), now.Add(time.Minute/2))
c.Assert(err, gc.IsNil)
c.Assert(v, gc.Equals, "b")
c.Assert(p.Len(), gc.Equals, 2)
// Fetch an item after the expiry time,
// causing current entries to be moved to old.
v, err = cache.GetAtTime(p, "a", fetchValue("a1"), now.Add(time.Minute+1))
c.Assert(err, gc.IsNil)
c.Assert(v, gc.Equals, "a1")
c.Assert(p.Len(), gc.Equals, 2)
c.Assert(cache.OldLen(p), gc.Equals, 1)
p.Evict("b")
v, err = cache.GetAtTime(p, "b", fetchValue("b1"), now.Add(time.Minute+2))
c.Assert(err, gc.IsNil)
c.Assert(v, gc.Equals, "b1")
}
func (*suite) TestEntriesRemovedWhenNotRetrieved(c *gc.C) {
now := time.Now()
p := cache.New(time.Minute)
// Populate the cache with an initial entry.
v, err := cache.GetAtTime(p, "a", fetchValue("a"), now)
c.Assert(err, gc.IsNil)
c.Assert(v, gc.Equals, "a")
c.Assert(p.Len(), gc.Equals, 1)
// Fetch another item after the expiry time,
// causing current entries to be moved to old.
v, err = cache.GetAtTime(p, "b", fetchValue("b"), now.Add(time.Minute+1))
c.Assert(err, gc.IsNil)
c.Assert(v, gc.Equals, "b")
c.Assert(p.Len(), gc.Equals, 2)
c.Assert(cache.OldLen(p), gc.Equals, 1)
// Fetch the other item after another expiry time
// causing the old entries to be discarded because
// nothing has fetched them.
v, err = cache.GetAtTime(p, "b", fetchValue("b"), now.Add(time.Minute*2+2))
c.Assert(err, gc.IsNil)
c.Assert(v, gc.Equals, "b")
c.Assert(p.Len(), gc.Equals, 1)
}