Example #1
0
func (s *RelationerSuite) assertHook(c *gc.C, expect hook.Info) {
	s.BackingState.StartSync()
	// We must ensure the local state dir exists first.
	c.Assert(s.dir.Ensure(), gc.IsNil)
	select {
	case hi, ok := <-s.hooks:
		c.Assert(ok, gc.Equals, true)
		expect.ChangeVersion = hi.ChangeVersion
		c.Assert(hi, gc.DeepEquals, expect)
		c.Assert(s.dir.Write(hi), gc.Equals, nil)
	case <-time.After(coretesting.LongWait):
		c.Fatalf("timed out waiting for %#v", expect)
	}
}
Example #2
0
func (s *RelationerSuite) TestPrepareCommitHooks(c *gc.C) {
	r := uniter.NewRelationer(s.apiRelUnit, s.dir, s.hooks)
	err := r.Join()
	c.Assert(err, gc.IsNil)
	ctx := r.Context()
	c.Assert(ctx.UnitNames(), gc.HasLen, 0)

	// Check preparing an invalid hook changes nothing.
	changed := hook.Info{
		Kind:          hooks.RelationChanged,
		RemoteUnit:    "u/1",
		ChangeVersion: 7,
	}
	_, err = r.PrepareHook(changed)
	c.Assert(err, gc.ErrorMatches, `inappropriate "relation-changed" for "u/1": unit has not joined`)
	c.Assert(ctx.UnitNames(), gc.HasLen, 0)
	c.Assert(s.dir.State().Members, gc.HasLen, 0)

	// Check preparing a valid hook updates the context, but not persistent
	// relation state.
	joined := hook.Info{
		Kind:       hooks.RelationJoined,
		RemoteUnit: "u/1",
	}
	name, err := r.PrepareHook(joined)
	c.Assert(err, gc.IsNil)
	c.Assert(s.dir.State().Members, gc.HasLen, 0)
	c.Assert(name, gc.Equals, "ring-relation-joined")
	c.Assert(ctx.UnitNames(), gc.DeepEquals, []string{"u/1"})

	// Check that preparing the following hook fails as before...
	_, err = r.PrepareHook(changed)
	c.Assert(err, gc.ErrorMatches, `inappropriate "relation-changed" for "u/1": unit has not joined`)
	c.Assert(s.dir.State().Members, gc.HasLen, 0)
	c.Assert(ctx.UnitNames(), gc.DeepEquals, []string{"u/1"})

	// ...but that committing the previous hook updates the persistent
	// relation state...
	err = r.CommitHook(joined)
	c.Assert(err, gc.IsNil)
	c.Assert(s.dir.State().Members, gc.DeepEquals, map[string]int64{"u/1": 0})
	c.Assert(ctx.UnitNames(), gc.DeepEquals, []string{"u/1"})

	// ...and allows us to prepare the next hook...
	name, err = r.PrepareHook(changed)
	c.Assert(err, gc.IsNil)
	c.Assert(name, gc.Equals, "ring-relation-changed")
	c.Assert(s.dir.State().Members, gc.DeepEquals, map[string]int64{"u/1": 0})
	c.Assert(ctx.UnitNames(), gc.DeepEquals, []string{"u/1"})

	// ...and commit it.
	err = r.CommitHook(changed)
	c.Assert(err, gc.IsNil)
	c.Assert(s.dir.State().Members, gc.DeepEquals, map[string]int64{"u/1": 7})
	c.Assert(ctx.UnitNames(), gc.DeepEquals, []string{"u/1"})

	// To verify implied behaviour above, prepare a new joined hook with
	// missing membership information, and check relation context
	// membership is updated appropriately...
	joined.RemoteUnit = "u/2"
	joined.ChangeVersion = 3
	name, err = r.PrepareHook(joined)
	c.Assert(err, gc.IsNil)
	c.Assert(s.dir.State().Members, gc.HasLen, 1)
	c.Assert(name, gc.Equals, "ring-relation-joined")
	c.Assert(ctx.UnitNames(), gc.DeepEquals, []string{"u/1", "u/2"})

	// ...and so is relation state on commit.
	err = r.CommitHook(joined)
	c.Assert(err, gc.IsNil)
	c.Assert(s.dir.State().Members, gc.DeepEquals, map[string]int64{"u/1": 7, "u/2": 3})
	c.Assert(ctx.UnitNames(), gc.DeepEquals, []string{"u/1", "u/2"})
}