[Live Now] Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Join for FREE! Join TestMu Conference

How to use MappedPort method of testcontainers Package

Best Testcontainers-go code snippet using testcontainers.MappedPort

psql_testcontainer.go

Source:psql_testcontainer.go

...19	PostgreSQLContainerConfig struct {20		ImageTag   string21		User       string22		Password   string23		MappedPort string24		Database   string25	}26)27// GetDSN returns DB connection URL.28func (c PostgreSQLContainer) GetDSN() string {29	return fmt.Sprintf("postgres://%s:%s@localhost:%s/%s?sslmode=disable", c.Config.User, c.Config.Password, c.Config.MappedPort, c.Config.Database)30}31func WithPostgreSQLTag(tag string) PostgreSQLContainerOption {32	return func(c *PostgreSQLContainerConfig) {33		c.ImageTag = tag34	}35}36func WithPostgreSQLDatabaseName(dbName string) PostgreSQLContainerOption {37	return func(c *PostgreSQLContainerConfig) {38		c.Database = dbName39	}40}41// NewPostgreSQLContainer creates and starts a PostgreSQL container.42func NewPostgreSQLContainer(ctx context.Context, opts ...PostgreSQLContainerOption) (*PostgreSQLContainer, error) {43	const (44		psqlImage = "postgres"45		psqlPort  = "5432"46	)47	// Define container ENVs48	config := PostgreSQLContainerConfig{49		ImageTag: "11.5",50		User:     "user",51		Password: "password",52		Database: "mockdb",53	}54	for _, opt := range opts {55		opt(&config)56	}57	containerPort := psqlPort + "/tcp"58	// Build testcontainer request59	req := testcontainers.GenericContainerRequest{60		ContainerRequest: testcontainers.ContainerRequest{61			Env: map[string]string{62				"POSTGRES_USER":     config.User,63				"POSTGRES_PASSWORD": config.Password,64				"POSTGRES_DB":       config.Database,65			},66			ExposedPorts: []string{67				containerPort,68			},69			Image:      fmt.Sprintf("%s:%s", psqlImage, config.ImageTag),70			SkipReaper: true,71			WaitingFor: wait.ForSQL(72				nat.Port(containerPort),73				"postgres",74				func(port nat.Port) string {75					return fmt.Sprintf("postgres://%s:%s@localhost:%s/%s?sslmode=disable", config.User, config.Password, port.Port(), config.Database)76				}).77				Timeout(5 * time.Second),78		},79		Started:      true,80		ProviderType: testcontainers.ProviderDocker,81	}82	// Create and run testcontainer83	provider, err := req.ProviderType.GetProvider()84	if err != nil {85		return nil, fmt.Errorf("getting request provider: %w", err)86	}87	container, err := provider.CreateContainer(ctx, req.ContainerRequest)88	if err != nil {89		return nil, fmt.Errorf("creating container: %w", err)90	}91	if err := container.Start(ctx); err != nil {92		return nil, fmt.Errorf("starting container: %w", err)93	}94	// Get mapped port for 5432/tcp95	mappedPort, err := container.MappedPort(ctx, nat.Port(containerPort))96	if err != nil {97		return nil, fmt.Errorf("getting mapped port for (%s): %w", containerPort, err)98	}99	config.MappedPort = mappedPort.Port()100	return &PostgreSQLContainer{101		Container: container,102		Config:    config,103	}, nil104}...

base_test.go

Source:base_test.go

...48	ip, err := dbContainer.Host(ctx)49	if err != nil {50		log.Fatal(err)51	}52	mappedPort, err := dbContainer.MappedPort(ctx, "5432")53	if err != nil {54		log.Fatal(err)55	}56	i.cfg.Db.Host = ip57	i.cfg.Db.Port = mappedPort.Port()58	i.dbContainer = dbContainer59	if err := dbContainer.Start(ctx); err != nil {60		log.Fatal(err)61	}62	// auth63	req = testcontainers.ContainerRequest{64		Image:        "auth-service:latest",65		ExposedPorts: []string{"3000/tcp", "9000/tcp"},66		WaitingFor:   wait.ForLog("Grpc server started on port 3000"),67	}68	authContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{69		ContainerRequest: req,70		Started:          true,71	})72	if err != nil {73		log.Fatal(err)74	}75	ip, err = authContainer.Host(ctx)76	if err != nil {77		log.Fatal(err)78	}79	mappedPort, err = authContainer.MappedPort(ctx, "3000")80	if err != nil {81		log.Fatal(err)82	}83	i.cfg.Auth.Host = ip84	i.cfg.Auth.Port = mappedPort.Port()85	i.authContainer = authContainer86	if err := authContainer.Start(ctx); err != nil {87		log.Fatal(err)88	}89	// Analytics service90	go application.Run(cfg)91	delayForRunningService := time.Second * 292	time.Sleep(delayForRunningService)93}...

redis_test_container.go

Source:redis_test_container.go

...21	})22	if err != nil {23		return nil, err24	}25	mappedPort, err := container.MappedPort(ctx, "6379")26	if err != nil {27		return nil, err28	}29	hostIP, err := container.Host(ctx)30	if err != nil {31		return nil, err32	}33	addr := fmt.Sprintf("%s:%s", hostIP, mappedPort.Port())34	return &RedisTestContainer{Container: container, Addr: addr}, nil35}...

MappedPort

Using AI Code Generation

1import (2func main() {3    ctx := context.Background()4    req := testcontainers.ContainerRequest{5        ExposedPorts: []string{"5432/tcp"},6        WaitingFor:   wait.ForListeningPort("5432/tcp"),7    }8    postgres, _ := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9    })10    defer postgres.Terminate(ctx)11    port, _ := postgres.MappedPort(ctx, "5432/tcp")12    fmt.Println(port.Int())13}

MappedPort

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"6379/tcp"},6		WaitingFor:   wait.ForLog("Ready to accept connections"),7	}8	redisContainer, _ := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	defer redisContainer.Terminate(ctx)11	mappedPort, _ := redisContainer.MappedPort(ctx, "6379/tcp")12	fmt.Println(mappedPort.Int())13}

MappedPort

Using AI Code Generation

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

MappedPort

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, _ := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	redisHost, _ := redisContainer.Host(ctx)11	redisPort, _ := redisContainer.MappedPort(ctx, "6379/tcp")12	fmt.Println("Redis Host: " + redisHost)13	fmt.Println("Redis Port: " + redisPort.Port())14	time.Sleep(5 * time.Second)15	redisContainer.Terminate(ctx)16}

MappedPort

Using AI Code Generation

1func TestMappedPort(t *testing.T) {2	ctx := context.Background()3	req := testcontainers.ContainerRequest{4		ExposedPorts: []string{"6379/tcp"},5		WaitingFor:   wait.ForListeningPort("6379/tcp"),6	}7	redis, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{8	})9	if err != nil {10		panic(err)11	}12	defer redis.Terminate(ctx)13	mappedPort, err := redis.MappedPort(ctx, "6379/tcp")14	if err != nil {15		panic(err)16	}17	fmt.Printf("Mapped port: %s", mappedPort.Port())18}19func TestHost(t *testing.T) {20	ctx := context.Background()21	req := testcontainers.ContainerRequest{22		ExposedPorts: []string{"6379/tcp"},23		WaitingFor:   wait.ForListeningPort("6379/tcp"),24	}25	redis, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{26	})27	if err != nil {28		panic(err)29	}30	defer redis.Terminate(ctx)31	host, err := redis.Host(ctx)32	if err != nil {33		panic(err)34	}35	fmt.Printf("Host: %s", host)36}37func TestPort(t *testing.T) {38	ctx := context.Background()39	req := testcontainers.ContainerRequest{40		ExposedPorts: []string{"6379/tcp"},41		WaitingFor:   wait.ForListeningPort("6379/tcp"),42	}43	redis, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{44	})45	if err != nil {46		panic(err)47	}48	defer redis.Terminate(ctx)49	port, err := redis.Port(ctx, "6379/tcp")50	if err != nil {51		panic(err)52	}53	fmt.Printf("Port: %s", port)54}55func TestStart(t *testing.T) {

MappedPort

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: %v", err)12	}13	defer redisContainer.Terminate(ctx)14	port, err := redisContainer.MappedPort(ctx, "6379/tcp")15	if err != nil {16		log.Fatalf("Could not get the mapped port: %v", err)17	}18	host, err := redisContainer.Host(ctx)19	if err != nil {20		log.Fatalf("Could not get the container host: %v", err)21	}22	conn, err := net.Dial("tcp", fmt.Sprintf("%s:%s", host, port.Port()))23	if err != nil {24		log.Fatalf("Could not connect to container: %v", err)25	}26	defer conn.Close()27	fmt.Println("Connected to Redis!")28}

MappedPort

Using AI Code Generation

1import (2func main() {3  ctx := context.Background()4  req := testcontainers.ContainerRequest{5    ExposedPorts: []string{"80/tcp"},6    WaitingFor:   wait.ForHTTP("/"),7  }8  container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9  })10  if err != nil {11    log.Fatal(err)12  }13  port, err := container.MappedPort(ctx, "80")14  if err != nil {15    log.Fatal(err)16  }17  ip, err := container.Host(ctx)18  if err != nil {19    log.Fatal(err)20  }21  time.Sleep(5 * time.Second)22  resp, err := http.Get(url)23  if err != nil {24    log.Fatal(err)25  }26  fmt.Println(resp.Status)27  err = container.Terminate(ctx)28  if err != nil {29    log.Fatal(err)30  }31  os.Exit(0)32}33import (34func main() {35  ctx := context.Background()36  req := testcontainers.ContainerRequest{

MappedPort

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: %v", err)12	}13	mappedPort, err := redisContainer.MappedPort(ctx, "6379")14	if err != nil {15		log.Fatalf("Could not get port: %v", err)16	}17	fmt.Println(mappedPort.Int())18	redisContainer.Terminate(ctx)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	redisContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{28	})29	if err != nil {30		log.Fatalf("Could not start container: %v", err)31	}32	host, err := redisContainer.Host(ctx)33	if err != nil {34		log.Fatalf("Could not get host: %v", err)35	}36	mappedPort, err := redisContainer.MappedPort(ctx, "6379")37	if err != nil {38		log.Fatalf("Could not get port: %v", err

MappedPort

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"5432/tcp"},6		WaitingFor:   wait.ForListeningPort("5432/tcp"),7	}8	postgresContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		log.Fatal(err)12	}13	defer postgresContainer.Terminate(ctx)14	port, err := postgresContainer.MappedPort(ctx, "5432/tcp")15	if err != nil {16		log.Fatal(err)17	}18	fmt.Println(port.Int())19	time.Sleep(10 * time.Second)20}21import (22func main() {23	ctx := context.Background()24	req := testcontainers.ContainerRequest{25		ExposedPorts: []string{"5432/tcp"},26		WaitingFor:   wait.ForListeningPort("5432/tcp"),27	}28	postgresContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{29	})30	if err != nil {31		log.Fatal(err)32	}33	defer postgresContainer.Terminate(ctx)34	ip, err := postgresContainer.ContainerIP(ctx)

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.