// TestWatchMeterStatus tests the meter status watcher functionality.
func TestWatchMeterStatus(c *gc.C, status meterstatus.MeterStatus, unit *jujustate.Unit, state *jujustate.State, resources *common.Resources) {
c.Assert(resources.Count(), gc.Equals, 0)
args := params.Entities{Entities: []params.Entity{
{Tag: unit.UnitTag().String()},
{Tag: "unit-foo-42"},
}}
result, err := status.WatchMeterStatus(args)
c.Assert(err, jc.ErrorIsNil)
c.Assert(result, gc.DeepEquals, params.NotifyWatchResults{
Results: []params.NotifyWatchResult{
{NotifyWatcherId: "1"},
{Error: apiservertesting.ErrUnauthorized},
},
})
// Verify the resource was registered and stop when done
c.Assert(resources.Count(), gc.Equals, 1)
resource := resources.Get("1")
defer statetesting.AssertStop(c, resource)
// Check that the Watch has consumed the initial event ("returned" in
// the Watch call)
wc := statetesting.NewNotifyWatcherC(c, state, resource.(jujustate.NotifyWatcher))
wc.AssertNoChange()
err = unit.SetMeterStatus("GREEN", "No additional information.")
c.Assert(err, jc.ErrorIsNil)
wc.AssertOneChange()
}
