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manifold_test.go
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manifold_test.go
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// Copyright 2016 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package singular_test
import (
"time"
"github.com/juju/clock/testclock"
"github.com/juju/errors"
"github.com/juju/testing"
jc "github.com/juju/testing/checkers"
gc "gopkg.in/check.v1"
"gopkg.in/juju/names.v2"
"gopkg.in/juju/worker.v1"
"gopkg.in/juju/worker.v1/dependency"
dt "gopkg.in/juju/worker.v1/dependency/testing"
"github.com/juju/juju/api/base"
"github.com/juju/juju/cmd/jujud/agent/engine"
coretesting "github.com/juju/juju/testing"
"github.com/juju/juju/worker/singular"
)
type ManifoldSuite struct {
testing.IsolationSuite
config singular.ManifoldConfig
}
var _ = gc.Suite(&ManifoldSuite{})
func (s *ManifoldSuite) SetUpTest(c *gc.C) {
s.IsolationSuite.SetUpTest(c)
s.config = singular.ManifoldConfig{
Clock: testclock.NewClock(time.Now()),
APICallerName: "api-caller",
Duration: time.Minute,
NewFacade: func(base.APICaller, names.MachineTag, names.Tag) (singular.Facade, error) {
return nil, errors.NotImplementedf("NewFacade")
},
NewWorker: func(config singular.FlagConfig) (worker.Worker, error) {
return nil, errors.NotImplementedf("NewWorker")
},
}
}
func (s *ManifoldSuite) TestValidate(c *gc.C) {
c.Check(s.config.Validate(), jc.ErrorIsNil)
}
func (s *ManifoldSuite) TestValidateMissingClock(c *gc.C) {
s.config.Clock = nil
err := s.config.Validate()
c.Check(err, jc.Satisfies, errors.IsNotValid)
c.Check(err.Error(), gc.Equals, "nil Clock not valid")
}
func (s *ManifoldSuite) TestValidateMissingAPICallerName(c *gc.C) {
s.config.APICallerName = ""
err := s.config.Validate()
c.Check(err, jc.Satisfies, errors.IsNotValid)
c.Check(err.Error(), gc.Equals, "missing APICallerName not valid")
}
func (s *ManifoldSuite) TestValidateMissingNewFacade(c *gc.C) {
s.config.NewFacade = nil
err := s.config.Validate()
c.Check(err, jc.Satisfies, errors.IsNotValid)
c.Check(err.Error(), gc.Equals, "nil NewFacade not valid")
}
func (s *ManifoldSuite) TestValidateMissingNewWorker(c *gc.C) {
s.config.NewWorker = nil
err := s.config.Validate()
c.Check(err, jc.Satisfies, errors.IsNotValid)
c.Check(err.Error(), gc.Equals, "nil NewWorker not valid")
}
func (s *ManifoldSuite) TestInputs(c *gc.C) {
manifold := singular.Manifold(singular.ManifoldConfig{
APICallerName: "kim",
})
expectInputs := []string{"kim"}
c.Check(manifold.Inputs, jc.DeepEquals, expectInputs)
}
func (s *ManifoldSuite) TestOutputBadWorker(c *gc.C) {
manifold := singular.Manifold(singular.ManifoldConfig{})
var out engine.Flag
err := manifold.Output(&fakeWorker{}, &out)
c.Check(err, gc.ErrorMatches, `expected in to implement Flag; got a .*`)
c.Check(out, gc.IsNil)
}
func (s *ManifoldSuite) TestOutputBadResult(c *gc.C) {
manifold := singular.Manifold(singular.ManifoldConfig{})
fix := newFixture(c)
fix.Run(c, func(flag *singular.FlagWorker, _ *testclock.Clock, _ func()) {
var out interface{}
err := manifold.Output(flag, &out)
c.Check(err, gc.ErrorMatches, `expected out to be a \*Flag; got a .*`)
c.Check(out, gc.IsNil)
})
}
func (s *ManifoldSuite) TestOutputSuccess(c *gc.C) {
manifold := singular.Manifold(singular.ManifoldConfig{})
fix := newFixture(c)
fix.Run(c, func(flag *singular.FlagWorker, _ *testclock.Clock, _ func()) {
var out engine.Flag
err := manifold.Output(flag, &out)
c.Check(err, jc.ErrorIsNil)
c.Check(out, gc.Equals, flag)
})
}
func (s *ManifoldSuite) TestStartMissingClock(c *gc.C) {
manifold := singular.Manifold(singular.ManifoldConfig{
APICallerName: "api-caller",
})
context := dt.StubContext(nil, map[string]interface{}{})
worker, err := manifold.Start(context)
c.Check(errors.Cause(err), gc.ErrorMatches, `nil Clock not valid`)
c.Check(worker, gc.IsNil)
}
func (s *ManifoldSuite) TestStartMissingAPICaller(c *gc.C) {
manifold := singular.Manifold(s.config)
context := dt.StubContext(nil, map[string]interface{}{
"api-caller": dependency.ErrMissing,
})
worker, err := manifold.Start(context)
c.Check(errors.Cause(err), gc.Equals, dependency.ErrMissing)
c.Check(worker, gc.IsNil)
}
func (s *ManifoldSuite) TestStartNewFacadeError(c *gc.C) {
expectAPICaller := &fakeAPICaller{}
s.config.Claimant = names.NewMachineTag("123")
s.config.Entity = coretesting.ModelTag
s.config.NewFacade = func(apiCaller base.APICaller, claimant names.MachineTag, entity names.Tag) (singular.Facade, error) {
c.Check(apiCaller, gc.Equals, expectAPICaller)
c.Check(claimant.String(), gc.Equals, "machine-123")
c.Check(entity, gc.Equals, coretesting.ModelTag)
return nil, errors.New("grark plop")
}
manifold := singular.Manifold(s.config)
context := dt.StubContext(nil, map[string]interface{}{
"api-caller": expectAPICaller,
})
worker, err := manifold.Start(context)
c.Check(err, gc.ErrorMatches, "grark plop")
c.Check(worker, gc.IsNil)
}
func (s *ManifoldSuite) TestStartNewWorkerError(c *gc.C) {
expectFacade := &fakeFacade{}
s.config.NewFacade = func(base.APICaller, names.MachineTag, names.Tag) (singular.Facade, error) {
return expectFacade, nil
}
s.config.NewWorker = func(config singular.FlagConfig) (worker.Worker, error) {
c.Check(config.Facade, gc.Equals, expectFacade)
err := config.Validate()
c.Check(err, jc.ErrorIsNil)
return nil, errors.New("blomp tik")
}
manifold := singular.Manifold(s.config)
context := dt.StubContext(nil, map[string]interface{}{
"api-caller": &fakeAPICaller{},
})
worker, err := manifold.Start(context)
c.Check(err, gc.ErrorMatches, "blomp tik")
c.Check(worker, gc.IsNil)
}
func (s *ManifoldSuite) TestStartSuccess(c *gc.C) {
var stub testing.Stub
expectWorker := newStubWorker(&stub)
s.config.NewFacade = func(base.APICaller, names.MachineTag, names.Tag) (singular.Facade, error) {
return &fakeFacade{}, nil
}
s.config.NewWorker = func(_ singular.FlagConfig) (worker.Worker, error) {
return expectWorker, nil
}
manifold := singular.Manifold(s.config)
context := dt.StubContext(nil, map[string]interface{}{
"api-caller": &fakeAPICaller{},
})
worker, err := manifold.Start(context)
c.Check(err, jc.ErrorIsNil)
var out engine.Flag
err = manifold.Output(worker, &out)
c.Check(err, jc.ErrorIsNil)
c.Check(out.Check(), jc.IsTrue)
c.Check(worker.Wait(), jc.ErrorIsNil)
stub.CheckCallNames(c, "Check", "Wait")
}
func (s *ManifoldSuite) TestWorkerBouncesOnRefresh(c *gc.C) {
var stub testing.Stub
stub.SetErrors(singular.ErrRefresh)
errWorker := newStubWorker(&stub)
s.config.NewFacade = func(base.APICaller, names.MachineTag, names.Tag) (singular.Facade, error) {
return &fakeFacade{}, nil
}
s.config.NewWorker = func(_ singular.FlagConfig) (worker.Worker, error) {
return errWorker, nil
}
manifold := singular.Manifold(s.config)
context := dt.StubContext(nil, map[string]interface{}{
"api-caller": &fakeAPICaller{},
})
worker, err := manifold.Start(context)
c.Check(err, jc.ErrorIsNil)
c.Check(worker.Wait(), gc.Equals, dependency.ErrBounce)
}