func assertOneRelation(c *gc.C, srv *state.Service, relId int, endpoints ...state.Endpoint) *state.Relation {
rels, err := srv.Relations()
c.Assert(err, gc.IsNil)
c.Assert(rels, gc.HasLen, 1)
rel := rels[0]
c.Assert(rel.Id(), gc.Equals, relId)
c.Assert(rel.Endpoints(), jc.SameContents, endpoints)
name := srv.Name()
expectEp := endpoints[0]
ep, err := rel.Endpoint(name)
c.Assert(err, gc.IsNil)
c.Assert(ep, gc.DeepEquals, expectEp)
if len(endpoints) == 2 {
expectEp = endpoints[1]
}
eps, err := rel.RelatedEndpoints(name)
c.Assert(err, gc.IsNil)
c.Assert(eps, gc.DeepEquals, []state.Endpoint{expectEp})
return rel
}
func assertNoRelations(c *gc.C, srv *state.Service) {
rels, err := srv.Relations()
c.Assert(err, gc.IsNil)
c.Assert(rels, gc.HasLen, 0)
}