How to use Connect method of testcontainers Package

Best Testcontainers-go code snippet using testcontainers.Connect

database.go

Source:database.go

...10	"testing"11)12// DB is a global variable for the gorm database.13var DB *gorm.DB14// ConnectDatabaseEnv connects to the database using environment variables.15func ConnectDatabaseEnv() {16	dsn := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",17		os.Getenv("DB_HOST"),18		os.Getenv("DB_PORT"),19		os.Getenv("DB_USER"),20		os.Getenv("DB_PASS"),21		os.Getenv("DB_NAME"))22	ConnectDatabase(dsn)23}24// ConnectDatabase connects to the database using a data source name25func ConnectDatabase(dsn string) {26	db, err := InitDatabase(dsn)27	if err != nil {28		panic(err)29	}30	DB = db31}32// InitDatabase opens and migrates the database using a data source name33func InitDatabase(dsn string) (*gorm.DB, error) {34	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})35	// Migrate the db36	if err == nil {37		db.AutoMigrate(&Account{})38		db.AutoMigrate(&Resource{})39		db.AutoMigrate(&Token{})40	}41	return db, err42}43// InitTestDatabase initializes a container and a database connection.44func InitTestDatabase(ctx context.Context) (testcontainers.Container, *gorm.DB, error) {45	// Create the Postgres test container46	req := testcontainers.ContainerRequest{47		Image:        "postgis/postgis:latest",48		ExposedPorts: []string{"5432/tcp"},49		Env: map[string]string{50			"POSTGRES_DB": "postgres",51			"POSTGRES_USER": "postgres",52			"POSTGRES_PASSWORD": "postgres",53		},54		WaitingFor: wait.ForLog("database system is ready to accept connections").WithOccurrence(2),55	}56	container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{57		ContainerRequest: req,58		Started:          true,59	})60	if err != nil {61		panic(err)62	}63	// Get the host64	host, err := container.Host(ctx)65	if err != nil {66		container.Terminate(ctx)67		return nil, nil, err68	}69	// Get the port70	port, err := container.MappedPort(ctx, "5432")71	if err != nil {72		container.Terminate(ctx)73		return nil, nil, err74	}75	// Create connection string to the test container76	dsn := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",77		host,78		port.Port(),79		"postgres",80		"postgres",81		"postgres")82	// Connect to the database83	database, err := InitDatabase(dsn)84	if err != nil {85		container.Terminate(ctx)86		return nil, nil, err87	}88	return container, database, nil89}90// SetupTestDatabase setups the global DB variable.91func SetupTestDatabase(t *testing.T, ctx context.Context) testcontainers.Container {92	container, database, err := InitTestDatabase(ctx)93	if err != nil {94		t.Fatal(err)95	}96	DB = database...

manager_test.go

Source:manager_test.go

...43	os.Setenv("CLICKHOUSE_DB_PORT", p.Port())44	defer clickhouseContainer.Terminate(ctx) //nolint45	os.Exit(m.Run())46}47func TestConnect(t *testing.T) {48	mappedPort, err := strconv.Atoi(os.Getenv("CLICKHOUSE_DB_PORT"))49	if err != nil {50		t.Fatal("Unable to read port value from environment")51	}52	t.Run("can only connect once", func(t *testing.T) {53		// get before connection54		manager := platform.GetResourceManager()55		require.Nil(t, manager.DbClient)56		// init connection57		err = manager.Connect("localhost", uint16(mappedPort), "", "")58		require.Nil(t, err)59		require.NotNil(t, manager.DbClient)60		// try and re-fetch connection61		err = manager.Connect("localhost", uint16(mappedPort), "", "")62		require.NotNil(t, err)63		require.Equal(t, "connect can only be called once", err.Error())64	})65}66func TestGetResourceManager(t *testing.T) {67	t.Run("get resource manager", func(t *testing.T) {68		manager := platform.GetResourceManager()69		require.NotNil(t, manager)70		manager2 := platform.GetResourceManager()71		require.NotNil(t, manager2)72		require.Equal(t, &manager, &manager2)73	})74}...

mqttdevice_test.go

Source:mqttdevice_test.go

...35}36func TestIntegration(t *testing.T) {37	ctx, mqttC, mqttUri := startMqttContainer(t)38	defer mqttC.Terminate(ctx)39	t.Run("ConnectAndClose", func(t *testing.T) {40		t.Logf("Mqtt connection %s ready", mqttUri)41		p := PahoMqttPublisher{Uri: mqttUri, ClientId: "TestMqtt", Username: "guest", Password: "guest"}42		p.Connect()43		p.Close()44	})45	t.Run("Publish", func(t *testing.T) {46		options := mqtt.NewClientOptions().AddBroker(mqttUri)47		options.SetUsername("guest")48		options.SetPassword("guest")49		client := mqtt.NewClient(options)50		token := client.Connect()51		defer client.Disconnect(100)52		token.Wait()53		if token.Error() != nil {54			t.Fatalf("unable to connect to mqtt broker: %v\n", token.Error())55		}56		c := make(chan string)57		defer close(c)58		client.Subscribe("test/publish", 0, func(client mqtt.Client, message mqtt.Message) {59			c <- string(message.Payload())60		}).Wait()61		p := PahoMqttPublisher{Uri: mqttUri, ClientId: "TestMqtt", Username: "guest", Password: "guest"}62		p.Connect()63		defer p.Close()64		p.Publish("test/publish", "Test1234")65		result := <-c66		if result != "Test1234" {67			t.Fatalf("bad message: %v\n", result)68		}69	})70}...

Connect

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		panic(err)12	}13	ip, err := postgresContainer.Host(ctx)14	if err != nil {15		panic(err)16	}17	port, err := postgresContainer.MappedPort(ctx, "5432/tcp")18	if err != nil {19		panic(err)20	}21	connStr := fmt.Sprintf("host=%s port=%s user=postgres password=postgres dbname=postgres sslmode=disable", ip, port.Port())22	db, err := sql.Open("postgres", connStr)23	if err != nil {24		panic(err)25	}26	defer db.Close()27	_, err = db.Exec("CREATE TABLE IF NOT EXISTS test (id int)")28	if err != nil {29		panic(err)30	}31	_, err = db.Exec("INSERT INTO test (id) VALUES (1)")32	if err != nil {33		panic(err)34	}35	_, err = db.Exec("INSERT INTO test (id) VALUES (2)")36	if err != nil {37		panic(err)38	}39	_, err = db.Exec("INSERT INTO test (id) VALUES (3)")40	if err != nil {41		panic(err)42	}43	rows, err := db.Query("SELECT * FROM test")44	if err != nil {45		panic(err)46	}47	for rows.Next() {48		err = rows.Scan(&id)49		if err != nil {50			panic(err)51		}

Connect

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	}8	postgresContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		log.Fatal(err)12	}13	defer postgresContainer.Terminate(ctx)14	ip, err := postgresContainer.Host(ctx)15	if err != nil {16		log.Fatal(err)17	}18	port, err := postgresContainer.MappedPort(ctx, "5432")19	if err != nil {20		log.Fatal(err)21	}22	fmt.Println("host=", ip, "port=", port.Int())23}

Connect

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	postgresContainer.Terminate(ctx)14}15import (16func main() {17	ctx := context.Background()18	req := testcontainers.ContainerRequest{19		ExposedPorts: []string{"5432/tcp"},20		WaitingFor:   wait.ForListeningPort("5432/tcp"),21	}22	postgresContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{23	})24	if err != nil {25		log.Fatal(err)26	}27	postgresContainer.Terminate(ctx)28}29import (30func main() {31	ctx := context.Background()32	req := testcontainers.ContainerRequest{33		ExposedPorts: []string{"5432/tcp"},34		WaitingFor:   wait.ForListeningPort("5432/tcp"),35	}36	postgresContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{37	})38	if err != nil {39		log.Fatal(err)40	}

Connect

Using AI Code Generation

1import (2func main() {3    ctx := context.Background()4    req := testcontainers.ContainerRequest{5        ExposedPorts: []string{"5432/tcp"},6        WaitingFor:   testcontainers.WaitingForListeningPort("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    ip, err := postgresContainer.Host(ctx)15    if err != nil {16        log.Fatal(err)17    }18    port, err := postgresContainer.MappedPort(ctx, "5432")19    if err != nil {20        log.Fatal(err)21    }22    log.Printf("postgres is available on %s:%s", ip, port.Port())23    time.Sleep(10 * time.Second)24}

Connect

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	nginxContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{9	})10	if err != nil {11		log.Fatal(err)12	}13	defer nginxContainer.Terminate(ctx)14	ip, err := nginxContainer.Host(ctx)15	if err != nil {16		log.Fatal(err)17	}18	mappedPort, err := nginxContainer.MappedPort(ctx, "80")19	if err != nil {20		log.Fatal(err)21	}22	resp, err := http.Get(url)23	if err != nil {24		log.Fatal(err)25	}26	fmt.Printf("Response: %s", resp.Status)27}

Connect

Using AI Code Generation

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

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