fake

package
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 Go to latest Published: Jul 9, 2021 License: Apache-2.0 Imports: 22 Imported by: 0

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Index

Constants

View Source 
const FakeURLPrefix = "https://info.example.com/"

FakeURLPrefix is the url that all fake InfoURLs are prefixed with.

Variables

This section is empty.

Functions

func InfoURL 

func InfoURL(e *dm.Execution_ID) string

InfoURL builds a fake InfoURL for the given Execution_ID

func MakeToken 

func MakeToken(eid *dm.Execution_ID) distributor.Token

MakeToken makes a distributor Token out of an Execution_ID. In this implementation of a Distributor there's a 1:1 mapping between Execution_ID and distributor task. This is not always the case for real distributor implementations.

func QuestDesc 

func QuestDesc(name string) *dm.Quest_Desc

QuestDesc generates a normalized generic QuestDesc of the form: 

Quest_Desc{
  DistributorConfigName: "fakeDistributor",
  Parameters:            `{"name":"$name"}`,
  DistributorParameters: "{}",
}

func WalkShouldReturn 

func WalkShouldReturn(c context.Context, s dm.DepsServer, keepTimestamps ...bool) func(request interface{}, expect ...interface{}) string

WalkShouldReturn is a convey-style assertion factory to assert that a given WalkGraph request object results in the provided GraphData.

If keepTimestamps (a singular, optional boolean) is provided and true, WalkShouldReturn will not remove timestamps from the compared GraphData. If it is absent or false, GraphData.PurgeTimestamps will be called on the returned GraphData before comparing it to the expected value.

Use this function like: 

req := &dm.WalkGraphReq{...}
So(req, WalkShouldReturn(c, s), &dm.GraphData{
  ...
})

Types

type ActivatedTask 

type ActivatedTask struct {
	Auth *dm.Execution_Auth
	Desc *dm.Quest_Desc
	// State is read/writable.
	State *dm.JsonResult
	// contains filtered or unexported fields
}

ActivatedTask is like a Task, but exists after calling Task.MustActivate, and contains an activated authentication token. This may be used to either add new dependencies or to provide a finished result.

The implementation of DepsServer also automatically populates all outgoing RPCs with the activated Auth value.

func (*ActivatedTask) DepOn 

func (t *ActivatedTask) DepOn(to ...*dm.Attempt_ID) (bool, error)

DepOn is a shorthand for EnsureGraphData which allows you to depend on multiple existing quests by attempt id. The definitions for these quests must already have been added to the deps server (probably with an EnsureGraphData call).

func (*ActivatedTask) EnsureGraphData 

func (t *ActivatedTask) EnsureGraphData(req *dm.EnsureGraphDataReq) (*dm.EnsureGraphDataRsp, error)

EnsureGraphData calls the bound DepsServer's EnsureGraphData method with the activated Auth field in ForExecution.

func (*ActivatedTask) Finish 

func (t *ActivatedTask) Finish(resultJSON string, expire ...time.Time)

Finish calls FinishAttempt with the provided JSON body and optional expiration time.

This will panic if you provide more than one expiration time (so don't do that).

func (*ActivatedTask) MustDepOn 

func (t *ActivatedTask) MustDepOn(to ...*dm.Attempt_ID) (halt bool)

MustDepOn is the same as DepOn but will panic if DepOn would have returned a non-nil error.

func (*ActivatedTask) WalkGraph 

func (t *ActivatedTask) WalkGraph(req *dm.WalkGraphReq) (*dm.GraphData, error)

WalkGraph calls the bound DepsServer's WalkGraph method with the activated Auth field.

func (*ActivatedTask) WalkShouldReturn 

func (t *ActivatedTask) WalkShouldReturn(request interface{}, expect ...interface{}) string

WalkShouldReturn is a shorthand for the package-level WalkShouldReturn which binds the activated auth to the WalkGraph request, but otherwise behaves identically.

Use this method like: 

req := &dm.WalkGraphReq{...}
So(req, activated.WalkShouldReturn, &dm.GraphData{
  ...
})

type BoundDistributor 

type BoundDistributor struct {
	*Distributor
	// contains filtered or unexported fields
}

BoundDistributor binds the fake.Distributor to a Context and a distributor.Config. It implements distributor.D.

func (*BoundDistributor) Cancel 

func (d *BoundDistributor) Cancel(_ *dm.Quest_Desc, tok distributor.Token) (err error)

Cancel implements distributor.D

func (*BoundDistributor) GetStatus 

func (d *BoundDistributor) GetStatus(_ *dm.Quest_Desc, tok distributor.Token) (rslt *dm.Result, err error)

GetStatus implements distributor.D

func (*BoundDistributor) HandleNotification 

func (d *BoundDistributor) HandleNotification(q *dm.Quest_Desc, n *distributor.Notification) (rslt *dm.Result, err error)

HandleNotification implements distributor.D

func (*BoundDistributor) HandleTaskQueueTask 

func (d *BoundDistributor) HandleTaskQueueTask(r *http.Request) ([]*distributor.Notification, error)

HandleTaskQueueTask is not implemented, and shouldn't be needed for most tests. It could be implemented if some new test required it, however.

func (*BoundDistributor) InfoURL 

func (d *BoundDistributor) InfoURL(tok distributor.Token) string

InfoURL implements distributor.D

func (*BoundDistributor) Run 

func (d *BoundDistributor) Run(desc *dm.Quest_Desc, exAuth *dm.Execution_Auth, prev *dm.JsonResult) (tok distributor.Token, pollbackTime time.Duration, err error)

Run implements distributor.D

func (*BoundDistributor) Validate 

func (d *BoundDistributor) Validate(payload string) error

Validate implements distributor.D (by returning a nil error for every payload).

type Distributor 

type Distributor struct {
	// RunError can be set to make Run return this error when it's invoked.
	RunError error
	// This can be set to turn the distributor into a polling-based distributor.
	PollbackTime time.Duration

	sync.Mutex
	// contains filtered or unexported fields
}

Distributor implements distributor.D, and provides a method (RunTask) to allow a test to actually run a task which has been scheduled on this Distributor, and correctly notify the deps server that the execution is complete.

func Setup 

func Setup(fn distributor.FinishExecutionFn) (ttest *tumble.Testing, c context.Context, dist *Distributor)

Setup creates a new combination of testing and context objects:

  • ttest - a tumble.Testing to allow you to control tumble's processing state
  • c - a context which includes a testing distributor registry, testsecrets, as well as everything that tumble.Testing.Context adds (datastore, memcache, etc.)
  • dist - a fake Distributor implementation with a RunTask method that allows your test to 'run' a scheduled task with the Distributor. This will automatically notify the deps service (by calling `fn`).

You should pass mutate.FinishExecutionFn for fn. It's not done automatically in order to break an import cycle. You could provide your own, but YMMV.

This sets the following configuration using the memory configuration mock: 

services/app/acls.cfg:
  readers: "reader_group"
  writers: "writer_group"

Usage: 

ttest, c, dist := fake.Setup(mutate.FinishExecutionFn)
s := deps.NewDecoratedServer()
# your tests

func (*Distributor) RunTask 

func (d *Distributor) RunTask(c context.Context, eid *dm.Execution_ID, cb func(*Task) error) (err error)

RunTask allows you to run the task associated with the provided execution id.

If the task corresponding to `eid` returns an error, or if the distributor itself actually has an error, this method will return an error. Notably, if `cb` returns an error, it will simply mark the corresponding task as FAILED, but will return nil here.

If the task exists and hasn't been run yet, cb will be called, and can do anything that you may want to a test to do. Think of the callback as the recipe engine; it has the opportunity to do anything it wants to, interact with the deps server (or not), succeed (or not), etc.

If the callback needs to maintain state between executions, Task.State is read+write; when the callback exits, the final value of Task.State will be passed back to the DM instance under test. A re-execution of the attempt will start with the new value.

type DistributorData 

type DistributorData struct {
	NotifyTopic pubsub.Topic
	NotifyAuth  string

	Auth *dm.Execution_Auth
	Desc *dm.Quest_Desc

	State *dm.JsonResult
	// contains filtered or unexported fields
}

DistributorData is the blob of data that the fake.Distributor keeps when DM calls its Run method. This is roughly equivalent to the state that a distributor (like swarming) would store in its own datastore about a job.

type Task 

type Task struct {
	Auth *dm.Execution_Auth
	Desc *dm.Quest_Desc
	// State is read/writable.
	State *dm.JsonResult
}

Task is the detail that the distributor task would get. This is roughly equivalent to the input that the swarming task/recipe engine would get.

func (*Task) Activate 

func (t *Task) Activate(c context.Context, s dm.DepsServer) (*ActivatedTask, error)

Activate does the activation handshake with the provided DepsServer and returns an ActivatedTask.

func (*Task) MustActivate 

func (t *Task) MustActivate(c context.Context, s dm.DepsServer) *ActivatedTask

MustActivate does the same thing as Activate, but panics if err != nil.

Source Files

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