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How to use ReuseOrCreateContainer method of testcontainers Package

Best Testcontainers-go code snippet using testcontainers.ReuseOrCreateContainer

docker.go

Source:docker.go

...976		return &containers[0], nil977	}978	return nil, nil979}980func (p *DockerProvider) ReuseOrCreateContainer(ctx context.Context, req ContainerRequest) (Container, error) {981	c, err := p.findContainerByName(ctx, req.Name)982	if err != nil {983		return nil, err984	}985	if c == nil {986		return p.CreateContainer(ctx, req)987	}988	sessionID := sessionID()989	var termSignal chan bool990	if !req.SkipReaper {991		r, err := NewReaper(context.WithValue(ctx, dockerHostContextKey, p.host), sessionID.String(), p, req.ReaperImage)992		if err != nil {993			return nil, fmt.Errorf("%w: creating reaper failed", err)994		}...

container.go

Source:container.go

...21}22// ContainerProvider allows the creation of containers on an arbitrary system23type ContainerProvider interface {24	CreateContainer(context.Context, ContainerRequest) (Container, error)        // create a container without starting it25	ReuseOrCreateContainer(context.Context, ContainerRequest) (Container, error) // reuses a container if it exists or creates a container without starting26	RunContainer(context.Context, ContainerRequest) (Container, error)           // create a container and start it27	Health(context.Context) error28	Config() TestContainersConfig29}30// Container allows getting info about and controlling a single container instance31type Container interface {32	GetContainerID() string                                         // get the container id from the provider33	Endpoint(context.Context, string) (string, error)               // get proto://ip:port string for the first exposed port34	PortEndpoint(context.Context, nat.Port, string) (string, error) // get proto://ip:port string for the given exposed port35	Host(context.Context) (string, error)                           // get host where the container port is exposed36	MappedPort(context.Context, nat.Port) (nat.Port, error)         // get externally mapped port for a container port37	Ports(context.Context) (nat.PortMap, error)                     // get all exposed ports38	SessionID() string                                              // get session id39	IsRunning() bool...

generic.go

Source:generic.go

...52		// we must protect the reusability of the container in the case it's invoked53		// in a parallel execution, via ParallelContainers or t.Parallel()54		reuseContainerMx.Lock()55		defer reuseContainerMx.Unlock()56		c, err = provider.ReuseOrCreateContainer(ctx, req.ContainerRequest)57	} else {58		c, err = provider.CreateContainer(ctx, req.ContainerRequest)59	}60	if err != nil {61		return nil, fmt.Errorf("%w: failed to create container", err)62	}63	if req.Started && !c.IsRunning() {64		if err := c.Start(ctx); err != nil {65			return c, fmt.Errorf("%w: failed to start container", err)66		}67	}68	return c, nil69}70// GenericProvider represents an abstraction for container and network providers...

ReuseOrCreateContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"3306/tcp"},6		WaitingFor:   wait.ForLog("port: 3306  MySQL Community Server - GPL"),7	}8	c, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		panic(err)12	}13	ip, err := c.Host(ctx)14	if err != nil {15		panic(err)16	}17	port, err := c.MappedPort(ctx, "3306")18	if err != nil {19		panic(err)20	}21	fmt.Println("Container IP:", ip)22	fmt.Println("Container Port:", port.Int())23}

ReuseOrCreateContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"80/tcp"},6		WaitingFor:   wait.ForListeningPort("80/tcp"),7	}8	c, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		log.Fatalf("Could not create container: %v", err)12	}13	defer c.Terminate(ctx)14	ip, err := c.Host(ctx)15	if err != nil {16		log.Fatalf("Could not get container IP: %v", err)17	}18	port, err := c.MappedPort(ctx, "80/tcp")19	if err != nil {20		log.Fatalf("Could not get mapped port: %v", err)21	}22	fmt.Println("Container IP is", ip)23	fmt.Println("Container port is", port.Int())24	time.Sleep(5 * time.Minute)25}

ReuseOrCreateContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"6379/tcp"},6		WaitingFor:   wait.ForListeningPort("6379/tcp"),7	}8	redisContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		log.Fatalf("Could not start container: %s", err)12	}13	defer redisContainer.Terminate(ctx)14	redisHost, err := redisContainer.Host(ctx)15	if err != nil {16		log.Fatalf("Could not get host: %s", err)17	}18	redisPort, err := redisContainer.MappedPort(ctx, "6379/tcp")19	if err != nil {20		log.Fatalf("Could not get port: %s", err)21	}22	fmt.Printf("Redis host: %s, port: %s23", redisHost, redisPort.Port())24	time.Sleep(10 * time.Second)25}26import (27func main() {28	ctx := context.Background()29	req := testcontainers.ContainerRequest{30		ExposedPorts: []string{"6379/tcp"},31		WaitingFor:   wait.ForListeningPort("6379/tcp"),32	}33	redisContainer, err := testcontainers.ReuseOrCreateContainer(ctx, testcontainers.GenericContainerRequest{34	})35	if err != nil {36		log.Fatalf("Could not start container: %s", err)37	}38	defer redisContainer.Terminate(ctx)39	redisHost, err := redisContainer.Host(ctx)40	if err != nil {41		log.Fatalf("Could not get host: %s", err)42	}43	redisPort, err := redisContainer.MappedPort(ctx, "6379/tcp")44	if err != nil {45		log.Fatalf("Could not get port

ReuseOrCreateContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"6379/tcp"},6		WaitingFor:   wait.ForListeningPort("6379/tcp"),7	}8	redisContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		log.Fatal(err)12	}13	defer redisContainer.Terminate(ctx)14	redisHost, err := redisContainer.Host(ctx)15	if err != nil {16		log.Fatal(err)17	}18	redisPort, err := redisContainer.MappedPort(ctx, "6379")19	if err != nil {20		log.Fatal(err)21	}22	fmt.Println(redisHost, redisPort.Int())23	time.Sleep(5 * time.Second)24}

ReuseOrCreateContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"5432/tcp"},6		WaitingFor:   wait.ForLog("database system is ready to accept connections"),7		Env:          map[string]string{"POSTGRES_PASSWORD": "password"},8	}9	container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{10	})11	if err != nil {12		log.Fatal(err)13	}14	host, err := container.Host(ctx)15	if err != nil {16		log.Fatal(err)17	}18	port, err := container.MappedPort(ctx, "5432/tcp")19	if err != nil {20		log.Fatal(err)21	}22	fmt.Printf("host: %s, port: %s23", host, port.Port())24	time.Sleep(5 * time.Minute)25}

ReuseOrCreateContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"80/tcp"},6		WaitingFor:   wait.ForLog("Ready to accept connections"),7	}8	container, err := testcontainers.ReuseOrCreateContainer(ctx, req, testcontainers.ReuseOrCreateContainerOptions{9	})10	if err != nil {11		log.Fatal(err)12	}13	err = container.Start(ctx)14	if err != nil {15		log.Fatal(err)16	}17	containerID, err := container.ContainerID(ctx)18	if err != nil {19		log.Fatal(err)20	}21	fmt.Println("Container ID: ", containerID)22	ip, err := container.Host(ctx)23	if err != nil {24		log.Fatal(err)25	}26	fmt.Println("Container IP: ", ip)27	mappedPort, err := container.MappedPort(ctx, "80")28	if err != nil {29		log.Fatal(err)30	}31	fmt.Println("Container mapped port: ", mappedPort.Int())32	status, err := container.ContainerStatus(ctx)33	if err != nil {34		log.Fatal(err)35	}36	fmt.Println("Container status: ",

ReuseOrCreateContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"6379/tcp"},6		WaitingFor:   wait.ForListeningPort("6379/tcp"),7	}8	redis, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		log.Fatal(err)12	}13	defer redis.Terminate(ctx)14	port, err := redis.MappedPort(ctx, "6379")15	if err != nil {16		log.Fatal(err)17	}18	fmt.Println(port.Int())19}20import (21func main() {22	ctx := context.Background()23	req := testcontainers.ContainerRequest{24		ExposedPorts: []string{"6379/tcp"},25		WaitingFor:   wait.ForListeningPort("6379/tcp"),26	}27	redis, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{28	})29	if err != nil {30		log.Fatal(err)31	}32	defer redis.Terminate(ctx)33	port, err := redis.MappedPort(ctx, "6379")34	if err != nil {35		log.Fatal(err)36	}37	fmt.Println(port.Int())38}39import (

ReuseOrCreateContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"80/tcp"},6		WaitingFor:   wait.ForLog("listening on port 80"),7	}8	c, reused, err := testcontainers.ReuseOrCreateContainer(ctx, req, testcontainers.ReuseContainerOption{Reuse: true})9	if err != nil {10		log.Fatal(err)11	}12	if reused {13		fmt.Println("container was reused")14	}15	if !reused {16		fmt.Println("container was not reused")17	}18	ip, err := c.Host(ctx)19	if err != nil {20		log.Fatal(err)21	}22	port, err := c.MappedPort(ctx, "80")23	if err != nil {24		log.Fatal(err)25	}26	id, err := c.ContainerID(ctx)27	if err != nil {28		log.Fatal(err)29	}30	fmt.Printf("container's ip address: %s31	fmt.Printf("container's port: %s32", port.Port())33	fmt.Printf("container's id: %s34	time.Sleep(10 * time.Second)35	err = c.Terminate(ctx)36	if err != nil {37		log.Fatal(err)38	}39}

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