func (s *S) TestRebuildRoutesRecreatesCnames(c *check.C) {
a := app.App{Name: "my-test-app", TeamOwner: s.team.Name}
err := app.CreateApp(&a, s.user)
c.Assert(err, check.IsNil)
err = provisiontest.ProvisionerInstance.AddUnits(&a, 1, "web", nil)
c.Assert(err, check.IsNil)
units, err := a.Units()
c.Assert(err, check.IsNil)
err = a.AddCName("my.cname.com")
c.Assert(err, check.IsNil)
c.Assert(routertest.FakeRouter.HasCName("my.cname.com"), check.Equals, true)
err = routertest.FakeRouter.UnsetCName("my.cname.com", a.Name)
c.Assert(err, check.IsNil)
c.Assert(routertest.FakeRouter.HasCName("my.cname.com"), check.Equals, false)
changes, err := rebuild.RebuildRoutes(&a)
c.Assert(err, check.IsNil)
c.Assert(changes, check.DeepEquals, &rebuild.RebuildRoutesResult{})
routes, err := routertest.FakeRouter.Routes(a.Name)
c.Assert(err, check.IsNil)
c.Assert(routes, check.HasLen, 1)
c.Assert(routertest.FakeRouter.HasRoute(a.Name, units[0].Address.String()), check.Equals, true)
c.Assert(routertest.FakeRouter.HasCName("my.cname.com"), check.Equals, true)
}