func (ss *stateSuite) TestPrune(c *C) {
st := state.New(&fakeStateBackend{})
st.Lock()
defer st.Unlock()
now := time.Now()
pruneWait := 1 * time.Hour
abortWait := 3 * time.Hour
unset := time.Time{}
t1 := st.NewTask("foo", "...")
t2 := st.NewTask("foo", "...")
t3 := st.NewTask("foo", "...")
t4 := st.NewTask("foo", "...")
chg1 := st.NewChange("abort", "...")
chg1.AddTask(t1)
state.MockChangeTimes(chg1, now.Add(-abortWait), unset)
chg2 := st.NewChange("prune", "...")
chg2.AddTask(t2)
c.Assert(chg2.Status(), Equals, state.DoStatus)
state.MockChangeTimes(chg2, now.Add(-pruneWait), now.Add(-pruneWait))
chg3 := st.NewChange("ready-but-recent", "...")
chg3.AddTask(t3)
state.MockChangeTimes(chg3, now.Add(-pruneWait), now.Add(-pruneWait/2))
chg4 := st.NewChange("old-but-not-ready", "...")
chg4.AddTask(t4)
state.MockChangeTimes(chg4, now.Add(-pruneWait/2), unset)
// unlinked task
t5 := st.NewTask("unliked", "...")
c.Check(st.Task(t5.ID()), IsNil)
state.MockTaskTimes(t5, now.Add(-pruneWait), now.Add(-pruneWait))
st.Prune(pruneWait, abortWait)
c.Assert(st.Change(chg1.ID()), Equals, chg1)
c.Assert(st.Change(chg2.ID()), IsNil)
c.Assert(st.Change(chg3.ID()), Equals, chg3)
c.Assert(st.Change(chg4.ID()), Equals, chg4)
c.Assert(st.Task(t1.ID()), Equals, t1)
c.Assert(st.Task(t2.ID()), IsNil)
c.Assert(st.Task(t3.ID()), Equals, t3)
c.Assert(st.Task(t4.ID()), Equals, t4)
c.Assert(chg1.Status(), Equals, state.HoldStatus)
c.Assert(chg3.Status(), Equals, state.DoStatus)
c.Assert(chg4.Status(), Equals, state.DoStatus)
c.Assert(t1.Status(), Equals, state.HoldStatus)
c.Assert(t3.Status(), Equals, state.DoStatus)
c.Assert(t4.Status(), Equals, state.DoStatus)
c.Check(st.TaskCount(), Equals, 3)
}
func (ss *stateSuite) TestPruneEmptyChange(c *C) {
// Empty changes are a bit special because they start out on Hold
// which is a Ready status, but the change itself is not considered Ready
// explicitly because that's how every change that will have tasks added
// to it starts their life.
st := state.New(&fakeStateBackend{})
st.Lock()
defer st.Unlock()
now := time.Now()
pruneWait := 1 * time.Hour
abortWait := 3 * time.Hour
chg := st.NewChange("abort", "...")
state.MockChangeTimes(chg, now.Add(-pruneWait), time.Time{})
st.Prune(pruneWait, abortWait)
c.Assert(st.Change(chg.ID()), IsNil)
}