KaneAI - World’s First E2E Software Testing Agent.Book a Demo Join TestMu Conference

How to use CopyFileFromContainer method of testcontainers Package

Best Testcontainers-go code snippet using testcontainers.CopyFileFromContainer

container.go

Source:container.go

...319		return err320	}321	return (*container.container).CopyToContainer(ctx, fileContent, containerFilePath, fileMode)322}323func (container *Container) CopyFileFromContainer(ctx context.Context, filePath string) (io.ReadCloser, error) {324	if err := container.assertStarted("CopyFileFromContainer"); err != nil {325		return nil, err326	}327	return (*container.container).CopyFileFromContainer(ctx, filePath)328}329// Will create any networks that don't already exist on system.330// Teardown/cleanup is handled by the testcontainers reaper.331func (container Container) createNetworksIfNecessary(req testcontainers.GenericContainerRequest) error {332	provider, err := req.ProviderType.GetProvider()333	if err != nil {334		return err335	}336	for _, networkName := range container.ContainerNetworks {337		query := testcontainers.NetworkRequest{338			Name: networkName,339		}340		networkResource, err := provider.GetNetwork(context.Background(), query)341		if err != nil && !errdefs.IsNotFound(err) {...

test_utils.go

Source:test_utils.go

...198	container.StartLogProducer(ctx)199	container.FollowOutput(&TestLogConsumer{})200	return container, err201}202// CopyFileFromContainer will copy a file from a given docker container.203func CopyFileFromContainer(ctx context.Context, container testcontainers.Container, srcPath, dstPath string) error {204	reader, err := container.CopyFileFromContainer(ctx, srcPath)205	if err != nil {206		return err207	}208	defer reader.Close()209	b, err := ioutil.ReadAll(reader)210	if err != nil {211		return err212	}213	return ioutil.WriteFile(dstPath, b, 0644)214}215// DoHttpRequest will perform the http request.216func DoHttpRequest(method, url string, body []byte) ([]byte, error) {217	client := &http.Client{}218	req, err := http.NewRequest(method, url, bytes.NewBuffer(body))...

testcontainer_test.go

Source:testcontainer_test.go

...24		Started:          true,25	})26	require.NoError(t, err)27	defer k3sC.Terminate(ctx)28	reader, err := k3sC.CopyFileFromContainer(ctx, "/etc/rancher/k3s/k3s.yaml")29	require.NoError(t, err)30	res,err := ioutil.ReadAll(reader)31	require.NoError(t, err)32	port, err := k3sC.MappedPort(ctx, "6443/tcp")33	require.NoError(t, err)34	host, err := k3sC.Host(ctx)35	require.NoError(t, err)36	err, client := CreateClientSetFromBytes(res, host, port)37	require.NoError(t, err)38	depl := Deployment()39	depl, err = client.CreateDeployment(depl)40	require.NoError(t, err)41	err = client.AwaitDeploymentReady(depl.Name, depl.Namespace, 120)42	require.NoError(t, err)...

CopyFileFromContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		Cmd:          []string{"sh", "-c", "while true; do echo hello world; sleep 1; done"},6		ExposedPorts: []string{"80/tcp"},7		WaitingFor:   wait.ForLog("hello world"),8	}9	c, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{10	})11	if err != nil {12		log.Fatal(err)13	}14	id, err := c.ContainerID(ctx)15	if err != nil {16		log.Fatal(err)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	fmt.Printf("Container ID: %s, Host IP: %s, Mapped port: %s", id, ip, port.Port())27	docker, err := client.NewClientWithOpts(client.FromEnv)28	if err != nil {29		log.Fatal(err)30	}31	file, err := os.Create("test.txt")32	if err != nil {33		log.Fatal(err)34	}35	defer file.Close()36	err = docker.CopyToContainer(ctx, id, "/tmp", file, types.CopyToContainerOptions{})37	if err != nil {38		log.Fatal(err)39	}40	out, err := os.Create("test2.txt")41	if err != nil {42		log.Fatal(err)43	}44	defer out.Close()

CopyFileFromContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		Cmd:          []string{"sh", "-c", "echo hello > /tmp/file.txt"},6		ExposedPorts: []string{"80/tcp"},7		WaitingFor:   wait.ForLog("hello"),8	}9	alpine, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{10	})11	if err != nil {12		log.Fatal(err)13	}14	defer alpine.Terminate(ctx)15	fileContent, err := alpine.CopyFileFromContainer(ctx, "/tmp/file.txt")16	if err != nil {17		log.Fatal(err)18	}19	fmt.Println(string(fileContent))20}21import (22func main() {23	ctx := context.Background()24	req := testcontainers.ContainerRequest{25		Cmd:          []string{"sh", "-c", "cat /tmp/file.txt"},26		ExposedPorts: []string{"80/tcp"},27		WaitingFor:   wait.ForLog("hello"),28	}29	alpine, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{30	})31	if err != nil {32		log.Fatal(err)33	}34	defer alpine.Terminate(ctx)35	fileContent := []byte("hello")36	err = alpine.CopyFileToContainer(ctx, "/tmp/file.txt", fileContent)37	if err != nil {38		log.Fatal(err)39	}40	output, err := alpine.Exec(ctx, []string{"cat", "/tmp/file.txt"})41	if err != nil {42		log.Fatal(err)43	}44	fmt.Println(string(output))45}

CopyFileFromContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	docker, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())5	if err != nil {6		panic(err)7	}8	req := testcontainers.ContainerRequest{9		Cmd:          []string{"sh", "-c", "echo hello > /hello.txt"},10		ExposedPorts: []string{"80/tcp"},11		WaitingFor:   wait.ForLog("hello"),12	}13	testContainer, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{14	})15	if err != nil {16		panic(err)17	}18	err = testContainer.CopyFileFromContainer(ctx, "/hello.txt", "hello.txt")19	if err != nil {20		panic(err)21	}22	file, err := os.Open("hello.txt")23	if err != nil {24		panic(err)25	}26	defer file.Close()27	io.Copy(os.Stdout, file)28	err = testContainer.Terminate(ctx)29	if err != nil {30		panic(err)31	}32}33import (34func main() {35	ctx := context.Background()36	docker, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())

CopyFileFromContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		Cmd:          []string{"sh", "-c", "echo 'Hello from container' > /test.txt"},6		ExposedPorts: []string{"80/tcp"},7		WaitingFor:   testcontainers.WaitingForLog("Hello from container"),8	}9	container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{10	})11	if err != nil {12		log.Fatal(err)13	}14	defer container.Terminate(ctx)15	host, err := container.Host(ctx)16	if err != nil {17		log.Fatal(err)18	}19	port, err := container.MappedPort(ctx, "80")20	if err != nil {21		log.Fatal(err)22	}23	log.Printf("Container is listening on %s:%s", host, port.Port())24	err = container.CopyFileFromContainer(ctx, "/test.txt", "test.txt")25	if err != nil {26		log.Fatal(err)27	}28	file, err := ioutil.ReadFile("test.txt")29	if err != nil {30		log.Fatal(err)31	}32	log.Printf("File content: %s", file)33}

CopyFileFromContainer

Using AI Code Generation

1import (2func main() {3	req := testcontainers.ContainerRequest{4		Cmd:          []string{"sh", "-c", "echo 'Hello world!' > /tmp/test.txt"},5		ExposedPorts: []string{"22/tcp"},6		WaitingFor:   wait.ForLog("Hello world!"),7	}8	ctx := context.Background()9	provider, err := testcontainers.NewDockerProvider()10	if err != nil {11		log.Fatal(err)12	}13	container, err := testcontainers.GenericContainer(ctx, provider, req)14	if err != nil {15		log.Fatal(err)16	}17	err = container.CopyFileFromContainer(ctx, "/tmp/test.txt", "test.txt")18	if err != nil {19		log.Fatal(err)20	}21	content, err := ioutil.ReadFile("test.txt")22	if err != nil {23		log.Fatal(err)24	}25	fmt.Println(string(content))26	err = container.Terminate(ctx)27	if err != nil {28		log.Fatal(err)29	}30	err = os.Remove("test.txt")31	if err != nil {32		log.Fatal(err)33	}34}

CopyFileFromContainer

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	req := testcontainers.ContainerRequest{5		ExposedPorts: []string{"80/tcp"},6		Cmd:          []string{"sh", "-c", "while true; do echo hello world; sleep 1; done"},7		WaitingFor:   wait.ForLog("hello world"),8	}

CopyFileFromContainer

Using AI Code Generation

1func CopyFileFromContainer() {2    ctx := context.Background()3    req := testcontainers.ContainerRequest{4        Cmd:          []string{"sleep", "1h"},5        WaitingFor:   wait.ForLog("Listening on"),6        BindMounts:   map[string]string{"./": "/mnt"},7        ExposedPorts: []string{"8080/tcp"},8    }9    container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{10    })11    if err != nil {12        panic(err)13    }14    err = container.CopyFromContainer(ctx, "/mnt/1.go", "./2.go")15    if err != nil {16        panic(err)17    }18}19func CopyFileToContainer() {20    ctx := context.Background()21    req := testcontainers.ContainerRequest{22        Cmd:          []string{"sleep", "1h"},23        WaitingFor:   wait.ForLog("Listening on"),24        BindMounts:   map[string]string{"./": "/mnt"},25        ExposedPorts: []string{"8080/tcp"},26    }27    container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{28    })29    if err != nil {30        panic(err)31    }32    err = container.CopyToContainer(ctx, "./1.go", "/mnt/2.go")33    if err != nil {34        panic(err)35    }36}37func CopyFileToContainer() {38    ctx := context.Background()39    req := testcontainers.ContainerRequest{40        Cmd:          []string{"sleep", "1h"},41        WaitingFor:   wait.ForLog("Listening on"),

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.