pstest

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Published: Jun 26, 2024 License: Apache-2.0 Imports: 22 Imported by: 14

Documentation

Overview

Package pstest provides a fake Cloud PubSub service for testing. It implements a simplified form of the service, suitable for unit tests. It may behave differently from the actual service in ways in which the service is non-deterministic or unspecified: timing, delivery order, etc.

This package is EXPERIMENTAL and is subject to change without notice.

See the example for usage.

Index

Examples

Constants

This section is empty.

Variables

This section is empty.

Functions

func ResetMinAckDeadline

func ResetMinAckDeadline()

ResetMinAckDeadline resets the minack deadline to the default.

func SetMinAckDeadline

func SetMinAckDeadline(n time.Duration)

SetMinAckDeadline changes the minack deadline to n. Must be greater than or equal to 1 second. Remember to reset this value to the default after your test changes it. Example usage:

pstest.SetMinAckDeadlineSecs(1)
defer pstest.ResetMinAckDeadlineSecs()

func ValidateFilter added in v1.35.0

func ValidateFilter(filter string) error

ValidateFilter validates if the filter string is parsable.

Types

type GServer

type GServer struct {
	pb.UnimplementedPublisherServer
	pb.UnimplementedSubscriberServer
	pb.UnimplementedSchemaServiceServer
	// contains filtered or unexported fields
}

GServer is the underlying service implementor. It is not intended to be used directly.

func (*GServer) Acknowledge

func (s *GServer) Acknowledge(_ context.Context, req *pb.AcknowledgeRequest) (*emptypb.Empty, error)

func (*GServer) CommitSchema added in v1.29.0

func (s *GServer) CommitSchema(_ context.Context, req *pb.CommitSchemaRequest) (*pb.Schema, error)

func (*GServer) CreateSchema added in v1.15.0

func (s *GServer) CreateSchema(_ context.Context, req *pb.CreateSchemaRequest) (*pb.Schema, error)

func (*GServer) CreateSubscription

func (s *GServer) CreateSubscription(_ context.Context, ps *pb.Subscription) (*pb.Subscription, error)

func (*GServer) CreateTopic

func (s *GServer) CreateTopic(_ context.Context, t *pb.Topic) (*pb.Topic, error)

func (*GServer) DeleteSchema added in v1.15.0

func (s *GServer) DeleteSchema(_ context.Context, req *pb.DeleteSchemaRequest) (*emptypb.Empty, error)

func (*GServer) DeleteSchemaRevision added in v1.29.0

func (s *GServer) DeleteSchemaRevision(_ context.Context, req *pb.DeleteSchemaRevisionRequest) (*pb.Schema, error)

func (*GServer) DeleteSubscription

func (s *GServer) DeleteSubscription(_ context.Context, req *pb.DeleteSubscriptionRequest) (*emptypb.Empty, error)

func (*GServer) DeleteTopic

func (s *GServer) DeleteTopic(_ context.Context, req *pb.DeleteTopicRequest) (*emptypb.Empty, error)

func (*GServer) DetachSubscription added in v1.5.0

func (*GServer) GetSchema added in v1.15.0

func (s *GServer) GetSchema(_ context.Context, req *pb.GetSchemaRequest) (*pb.Schema, error)

func (*GServer) GetSubscription

func (s *GServer) GetSubscription(_ context.Context, req *pb.GetSubscriptionRequest) (*pb.Subscription, error)

func (*GServer) GetTopic

func (s *GServer) GetTopic(_ context.Context, req *pb.GetTopicRequest) (*pb.Topic, error)

func (*GServer) ListSchemaRevisions added in v1.29.0

func (*GServer) ListSchemas added in v1.15.0

func (*GServer) ListSubscriptions

func (*GServer) ListTopics

func (*GServer) ModifyAckDeadline

func (s *GServer) ModifyAckDeadline(_ context.Context, req *pb.ModifyAckDeadlineRequest) (*emptypb.Empty, error)

func (*GServer) Publish

func (s *GServer) Publish(_ context.Context, req *pb.PublishRequest) (*pb.PublishResponse, error)

func (*GServer) Pull

func (s *GServer) Pull(ctx context.Context, req *pb.PullRequest) (*pb.PullResponse, error)

func (*GServer) RollbackSchema added in v1.29.0

func (s *GServer) RollbackSchema(_ context.Context, req *pb.RollbackSchemaRequest) (*pb.Schema, error)

RollbackSchema rolls back the current schema to a previous revision by copying and creating a new revision.

func (*GServer) Seek

func (s *GServer) Seek(ctx context.Context, req *pb.SeekRequest) (*pb.SeekResponse, error)

func (*GServer) StreamingPull

func (s *GServer) StreamingPull(sps pb.Subscriber_StreamingPullServer) error

func (*GServer) UpdateSubscription

func (s *GServer) UpdateSubscription(_ context.Context, req *pb.UpdateSubscriptionRequest) (*pb.Subscription, error)

func (*GServer) UpdateTopic

func (s *GServer) UpdateTopic(_ context.Context, req *pb.UpdateTopicRequest) (*pb.Topic, error)

func (*GServer) ValidateMessage added in v1.15.0

ValidateMessage mocks the ValidateMessage call but only checks that the schema definition to validate the message against is not empty.

func (*GServer) ValidateSchema added in v1.15.0

ValidateSchema mocks the ValidateSchema call but only checks that the schema definition is not empty.

type Message

type Message struct {
	ID          string
	Data        []byte
	Attributes  map[string]string
	PublishTime time.Time
	Deliveries  int      // number of times delivery of the message was attempted
	Acks        int      // number of acks received from clients
	Modacks     []Modack // modacks received by server for this message
	OrderingKey string
	// contains filtered or unexported fields
}

A Message is a message that was published to the server.

type Modack

type Modack struct {
	AckID       string
	AckDeadline int32
	ReceivedAt  time.Time
}

Modack represents a modack sent to the server.

type Reactor added in v1.7.0

type Reactor interface {
	// React handles the message types and returns results.  If "handled" is false,
	// then the test server will ignore the results and continue to the next reactor
	// or the original handler.
	React(_ interface{}) (handled bool, ret interface{}, err error)
}

Reactor is an interface to allow reaction function to a certain call.

type ReactorOptions added in v1.7.0

type ReactorOptions map[string][]Reactor

ReactorOptions is a map that Server uses to look up reactors. Key is the function name, value is array of reactor for the function.

type Server

type Server struct {
	Addr    string  // The address that the server is listening on.
	GServer GServer // Not intended to be used directly.
	// contains filtered or unexported fields
}

Server is a fake Pub/Sub server.

func NewServer

func NewServer(opts ...ServerReactorOption) *Server

NewServer creates a new fake server running in the current process.

Example
package main

import (
	"context"

	"cloud.google.com/go/pubsub"
	"cloud.google.com/go/pubsub/pstest"
	"google.golang.org/api/option"
	"google.golang.org/grpc"
)

func main() {
	ctx := context.Background()
	// Start a fake server running locally.
	srv := pstest.NewServer()
	defer srv.Close()
	// Connect to the server without using TLS.
	conn, err := grpc.Dial(srv.Addr, grpc.WithInsecure())
	if err != nil {
		// TODO: Handle error.
	}
	defer conn.Close()
	// Use the connection when creating a pubsub client.
	client, err := pubsub.NewClient(ctx, "project", option.WithGRPCConn(conn))
	if err != nil {
		// TODO: Handle error.
	}
	defer client.Close()
	_ = client // TODO: Use the client.
}
Output:

func NewServerWithCallback added in v1.39.0

func NewServerWithCallback(port int, callback func(*grpc.Server), opts ...ServerReactorOption) *Server

NewServerWithCallback creates new fake server running in the current process at the specified port. Before starting the server, the provided callback is called to allow caller to register additional fakes into grpc server.

func NewServerWithPort added in v1.13.0

func NewServerWithPort(port int, opts ...ServerReactorOption) *Server

NewServerWithPort creates a new fake server running in the current process at the specified port.

Example
package main

import (
	"context"

	"cloud.google.com/go/pubsub"
	"cloud.google.com/go/pubsub/pstest"
	"google.golang.org/api/option"
	"google.golang.org/grpc"
)

func main() {
	ctx := context.Background()
	// Start a fake server running locally at 9001.
	srv := pstest.NewServerWithPort(9001)
	defer srv.Close()
	// Connect to the server without using TLS.
	conn, err := grpc.Dial(srv.Addr, grpc.WithInsecure())
	if err != nil {
		// TODO: Handle error.
	}
	defer conn.Close()
	// Use the connection when creating a pubsub client.
	client, err := pubsub.NewClient(ctx, "project", option.WithGRPCConn(conn))
	if err != nil {
		// TODO: Handle error.
	}
	defer client.Close()
	_ = client // TODO: Use the client.
}
Output:

func (*Server) AddPublishResponse added in v1.12.0

func (s *Server) AddPublishResponse(pbr *pb.PublishResponse, err error)

AddPublishResponse adds a new publish response to the channel used for responding to publish requests.

func (*Server) ClearMessages added in v1.1.0

func (s *Server) ClearMessages()

ClearMessages removes all published messages from internal containers.

func (*Server) Close

func (s *Server) Close() error

Close shuts down the server and releases all resources.

func (*Server) Message

func (s *Server) Message(id string) *Message

Message returns the message with the given ID, or nil if no message with that ID was published.

func (*Server) Messages

func (s *Server) Messages() []*Message

Messages returns information about all messages ever published.

func (*Server) Publish

func (s *Server) Publish(topic string, data []byte, attrs map[string]string) string

Publish behaves as if the Publish RPC was called with a message with the given data and attrs. It returns the ID of the message. The topic will be created if it doesn't exist.

Publish panics if there is an error, which is appropriate for testing.

func (*Server) PublishOrdered added in v1.5.0

func (s *Server) PublishOrdered(topic string, data []byte, attrs map[string]string, orderingKey string) string

PublishOrdered behaves as if the Publish RPC was called with a message with the given data, attrs and ordering key. It returns the ID of the message. The topic will be created if it doesn't exist.

PublishOrdered panics if there is an error, which is appropriate for testing.

func (*Server) ResetPublishResponses added in v1.12.0

func (s *Server) ResetPublishResponses(size int)

ResetPublishResponses resets the buffered publishResponses channel with a new buffered channel with the given size.

func (*Server) SetAutoPublishResponse added in v1.12.0

func (s *Server) SetAutoPublishResponse(autoPublishResponse bool)

SetAutoPublishResponse controls whether to automatically respond to messages published or to use user-added responses from the publishResponses channel.

func (*Server) SetStreamTimeout

func (s *Server) SetStreamTimeout(d time.Duration)

SetStreamTimeout sets the amount of time a stream will be active before it shuts itself down. This mimics the real service's behavior of closing streams after 30 minutes. If SetStreamTimeout is never called or is passed zero, streams never shut down.

func (*Server) SetTimeNowFunc added in v1.6.0

func (s *Server) SetTimeNowFunc(f func() time.Time)

SetTimeNowFunc registers f as a function to be used instead of time.Now for this server.

func (*Server) Wait

func (s *Server) Wait()

Wait blocks until all server activity has completed.

type ServerReactorOption added in v1.7.0

type ServerReactorOption struct {
	FuncName string
	Reactor  Reactor
}

ServerReactorOption is options passed to the server for reactor creation.

func WithErrorInjection added in v1.7.0

func WithErrorInjection(funcName string, code codes.Code, msg string) ServerReactorOption

WithErrorInjection creates a ServerReactorOption that injects error with defined status code and message for a certain function.

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