testcontainers

package module
v0.12.0 Latest Latest
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 Go to latest Published: Nov 19, 2021 License: MIT Imports: 37 Imported by: 591

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Testcontainers-Go is a Go package that makes it simple to create and clean up container-based dependencies for automated integration/smoke tests. The clean, easy-to-use API enables developers to programmatically define containers that should be run as part of a test and clean up those resources when the test is done.

Here's an example of a test that spins up an NGINX container validates that it returns 200 for the status code:

package main

import (
	"context"
	"fmt"
	"net/http"
	"testing"

	"github.com/testcontainers/testcontainers-go"
	"github.com/testcontainers/testcontainers-go/wait"
)

type nginxContainer struct {
	testcontainers.Container
	URI string
}

func setupNginx(ctx context.Context) (*nginxContainer, error) {
	req := testcontainers.ContainerRequest{
		Image:        "nginx",
		ExposedPorts: []string{"80/tcp"},
		WaitingFor:   wait.ForHTTP("/"),
	}
	container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
		ContainerRequest: req,
		Started:          true,
	})
	if err != nil {
		return nil, err
	}

	ip, err := container.Host(ctx)
	if err != nil {
		return nil, err
	}

	mappedPort, err := container.MappedPort(ctx, "80")
	if err != nil {
		return nil, err
	}

	uri := fmt.Sprintf("http://%s:%s", ip, mappedPort.Port())

	return &nginxContainer{Container: container, URI: uri}, nil
}

func TestIntegrationNginxLatestReturn(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test")
	}

	ctx := context.Background()

	nginxC, err := setupNginx(ctx)
	if err != nil {
		t.Fatal(err)
	}

	// Clean up the container after the test is complete
	defer nginxC.Terminate(ctx)

	resp, err := http.Get(nginxC.URI)
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("Expected status code %d. Got %d.", http.StatusOK, resp.StatusCode)
	}
}

Cleaning up your environment after test completion should be accomplished by deferring the container termination, e.g defer nginxC.Terminate(ctx). Reaper (Ryuk) is also enabled by default to help clean up.

Documentation

More information about TestContainers-Go can be found in ./docs, which is rendered at golang.testcontainers.org.

Documentation

Index

Examples

Constants

View Source 
const (
	Bridge        = "bridge"         // Bridge network name (as well as driver)
	ReaperDefault = "reaper_default" // Default network name when bridge is not available
)
View Source 
const (
	TestcontainerLabel          = "org.testcontainers.golang"
	TestcontainerLabelSessionID = TestcontainerLabel + ".sessionId"
	TestcontainerLabelIsReaper  = TestcontainerLabel + ".reaper"

	ReaperDefaultImage = "testcontainers/ryuk:0.3.3"
)
View Source 
const StderrLog = "STDERR"

StderrLog is the log type for STDERR

View Source 
const StdoutLog = "STDOUT"

StdoutLog is the log type for STDOUT

Variables

View Source 
var Logger = log.New(os.Stderr, "", log.LstdFlags)

Logger is the default log instance

Functions

func SkipIfProviderIsNotHealthy added in v0.7.0 

func SkipIfProviderIsNotHealthy(t *testing.T)

SkipIfProviderIsNotHealthy is a utility function capable of skipping tests if the provider is not healthy, or running at all. This is a function designed to be used in your test, when Docker is not mandatory for CI/CD. In this way tests that depend on testcontainers won't run if the provider is provisioned correctly.

Example 
SkipIfProviderIsNotHealthy(&testing.T{})

Output:

Types

type Container 

type Container interface {
	GetContainerID() string                                         // get the container id from the provider
	Endpoint(context.Context, string) (string, error)               // get proto://ip:port string for the first exposed port
	PortEndpoint(context.Context, nat.Port, string) (string, error) // get proto://ip:port string for the given exposed port
	Host(context.Context) (string, error)                           // get host where the container port is exposed
	MappedPort(context.Context, nat.Port) (nat.Port, error)         // get externally mapped port for a container port
	Ports(context.Context) (nat.PortMap, error)                     // get all exposed ports
	SessionID() string                                              // get session id
	Start(context.Context) error                                    // start the container
	Terminate(context.Context) error                                // terminate the container
	Logs(context.Context) (io.ReadCloser, error)                    // Get logs of the container
	FollowOutput(LogConsumer)
	StartLogProducer(context.Context) error
	StopLogProducer() error
	Name(context.Context) (string, error)                        // get container name
	State(context.Context) (*types.ContainerState, error)        //returns container's running state
	Networks(context.Context) ([]string, error)                  // get container networks
	NetworkAliases(context.Context) (map[string][]string, error) // get container network aliases for a network
	Exec(ctx context.Context, cmd []string) (int, error)
	ContainerIP(context.Context) (string, error) // get container ip
	CopyFileToContainer(ctx context.Context, hostFilePath string, containerFilePath string, fileMode int64) error
	CopyFileFromContainer(ctx context.Context, filePath string) (io.ReadCloser, error)
}

Container allows getting info about and controlling a single container instance

func GenericContainer 

func GenericContainer(ctx context.Context, req GenericContainerRequest) (Container, error)

GenericContainer creates a generic container with parameters

type ContainerProvider 

type ContainerProvider interface {
	CreateContainer(context.Context, ContainerRequest) (Container, error) // create a container without starting it
	RunContainer(context.Context, ContainerRequest) (Container, error)    // create a container and start it
	Health(context.Context) error
}

ContainerProvider allows the creation of containers on an arbitrary system

type ContainerRequest 

type ContainerRequest struct {
	FromDockerfile
	Image           string
	Entrypoint      []string
	Env             map[string]string
	ExposedPorts    []string // allow specifying protocol info
	Cmd             []string
	Labels          map[string]string
	BindMounts      map[string]string
	VolumeMounts    map[string]string
	Tmpfs           map[string]string
	RegistryCred    string
	WaitingFor      wait.Strategy
	Name            string // for specifying container name
	Hostname        string
	Privileged      bool                // for starting privileged container
	Networks        []string            // for specifying network names
	NetworkAliases  map[string][]string // for specifying network aliases
	User            string              // for specifying uid:gid
	SkipReaper      bool                // indicates whether we skip setting up a reaper for this
	ReaperImage     string              // alternative reaper image
	AutoRemove      bool                // if set to true, the container will be removed from the host when stopped
	NetworkMode     container.NetworkMode
	AlwaysPullImage bool // Always pull image
}

ContainerRequest represents the parameters used to get a running container

func (*ContainerRequest) GetBuildArgs added in v0.11.0 

func (c *ContainerRequest) GetBuildArgs() map[string]*string

GetBuildArgs returns the env args to be used when creating from Dockerfile

func (*ContainerRequest) GetContext added in v0.0.8 

func (c *ContainerRequest) GetContext() (io.Reader, error)

GetContext retrieve the build context for the request

func (*ContainerRequest) GetDockerfile added in v0.0.8 

func (c *ContainerRequest) GetDockerfile() string

GetDockerfile returns the Dockerfile from the ContainerRequest, defaults to "Dockerfile"

func (*ContainerRequest) ShouldBuildImage added in v0.0.9 

func (c *ContainerRequest) ShouldBuildImage() bool

func (*ContainerRequest) ShouldPrintBuildLog added in v0.11.0 

func (c *ContainerRequest) ShouldPrintBuildLog() bool

func (*ContainerRequest) Validate added in v0.0.8 

func (c *ContainerRequest) Validate() error

Validate ensures that the ContainerRequest does not have invalid parameters configured to it ex. make sure you are not specifying both an image as well as a context

type DeprecatedContainer 

type DeprecatedContainer interface {
	GetHostEndpoint(ctx context.Context, port string) (string, string, error)
	GetIPAddress(ctx context.Context) (string, error)
	LivenessCheckPorts(ctx context.Context) (nat.PortSet, error)
	Terminate(ctx context.Context) error
}

DeprecatedContainer shows methods that were supported before, but are now deprecated Deprecated: Use Container

type DockerCompose added in v0.5.1 

type DockerCompose interface {
	Down() ExecError
	Invoke() ExecError
	WaitForService(string, wait.Strategy) DockerCompose
	WithCommand([]string) DockerCompose
	WithEnv(map[string]string) DockerCompose
	WithExposedService(string, int, wait.Strategy) DockerCompose
}

DockerCompose defines the contract for running Docker Compose

type DockerContainer 

type DockerContainer struct {
	// Container ID from Docker
	ID         string
	WaitingFor wait.Strategy
	Image      string
	// contains filtered or unexported fields
}

DockerContainer represents a container started using Docker

func (*DockerContainer) ContainerIP added in v0.5.0 

func (c *DockerContainer) ContainerIP(ctx context.Context) (string, error)

ContainerIP gets the IP address of the primary network within the container.

func (*DockerContainer) CopyFileFromContainer added in v0.12.0 

func (c *DockerContainer) CopyFileFromContainer(ctx context.Context, filePath string) (io.ReadCloser, error)

func (*DockerContainer) CopyFileToContainer added in v0.8.0 

func (c *DockerContainer) CopyFileToContainer(ctx context.Context, hostFilePath string, containerFilePath string, fileMode int64) error

func (*DockerContainer) Endpoint 

func (c *DockerContainer) Endpoint(ctx context.Context, proto string) (string, error)

Endpoint gets proto://host:port string for the first exposed port Will returns just host:port if proto is ""

func (*DockerContainer) Exec added in v0.0.9 

func (c *DockerContainer) Exec(ctx context.Context, cmd []string) (int, error)

func (*DockerContainer) FollowOutput added in v0.3.0 

func (c *DockerContainer) FollowOutput(consumer LogConsumer)

FollowOutput adds a LogConsumer to be sent logs from the container's STDOUT and STDERR

func (*DockerContainer) GetContainerID 

func (c *DockerContainer) GetContainerID() string

func (*DockerContainer) Host 

func (c *DockerContainer) Host(ctx context.Context) (string, error)

Host gets host (ip or name) of the docker daemon where the container port is exposed Warning: this is based on your Docker host setting. Will fail if using an SSH tunnel You can use the "TC_HOST" env variable to set this yourself

func (*DockerContainer) Logs 

func (c *DockerContainer) Logs(ctx context.Context) (io.ReadCloser, error)

Logs will fetch both STDOUT and STDERR from the current container. Returns a ReadCloser and leaves it up to the caller to extract what it wants.

func (*DockerContainer) MappedPort 

func (c *DockerContainer) MappedPort(ctx context.Context, port nat.Port) (nat.Port, error)

MappedPort gets externally mapped port for a container port

func (*DockerContainer) Name added in v0.0.5 

func (c *DockerContainer) Name(ctx context.Context) (string, error)

Name gets the name of the container.

func (*DockerContainer) NetworkAliases added in v0.0.7 

func (c *DockerContainer) NetworkAliases(ctx context.Context) (map[string][]string, error)

NetworkAliases gets the aliases of the container for the networks it is attached to.

func (*DockerContainer) Networks added in v0.0.7 

func (c *DockerContainer) Networks(ctx context.Context) ([]string, error)

Networks gets the names of the networks the container is attached to.

func (*DockerContainer) PortEndpoint 

func (c *DockerContainer) PortEndpoint(ctx context.Context, port nat.Port, proto string) (string, error)

PortEndpoint gets proto://host:port string for the given exposed port Will returns just host:port if proto is ""

func (*DockerContainer) Ports 

func (c *DockerContainer) Ports(ctx context.Context) (nat.PortMap, error)

Ports gets the exposed ports for the container.

func (*DockerContainer) SessionID 

func (c *DockerContainer) SessionID() string

SessionID gets the current session id

func (*DockerContainer) Start 

func (c *DockerContainer) Start(ctx context.Context) error

Start will start an already created container

func (*DockerContainer) StartLogProducer added in v0.3.0 

func (c *DockerContainer) StartLogProducer(ctx context.Context) error

StartLogProducer will start a concurrent process that will continuously read logs from the container and will send them to each added LogConsumer

func (*DockerContainer) State added in v0.12.0 

func (c *DockerContainer) State(ctx context.Context) (*types.ContainerState, error)

State returns container's running state

func (*DockerContainer) StopLogProducer added in v0.3.0 

func (c *DockerContainer) StopLogProducer() error

StopLogProducer will stop the concurrent process that is reading logs and sending them to each added LogConsumer

func (*DockerContainer) Terminate 

func (c *DockerContainer) Terminate(ctx context.Context) error

Terminate is used to kill the container. It is usually triggered by as defer function.

type DockerNetwork added in v0.0.7 

type DockerNetwork struct {
	ID     string // Network ID from Docker
	Driver string
	Name   string
	// contains filtered or unexported fields
}

DockerNetwork represents a network started using Docker

func (*DockerNetwork) Remove added in v0.0.7 

func (n *DockerNetwork) Remove(ctx context.Context) error

Remove is used to remove the network. It is usually triggered by as defer function.

type DockerProvider 

type DockerProvider struct {
	// contains filtered or unexported fields
}

DockerProvider implements the ContainerProvider interface

func NewDockerProvider 

func NewDockerProvider() (*DockerProvider, error)

NewDockerProvider creates a Docker provider with the EnvClient

func (*DockerProvider) BuildImage added in v0.0.8 

func (p *DockerProvider) BuildImage(ctx context.Context, img ImageBuildInfo) (string, error)

BuildImage will build and image from context and Dockerfile, then return the tag

func (*DockerProvider) CreateContainer 

func (p *DockerProvider) CreateContainer(ctx context.Context, req ContainerRequest) (Container, error)

CreateContainer fulfills a request for a container without starting it

Example 
ctx := context.Background()
req := ContainerRequest{
	Image:        "nginx",
	ExposedPorts: []string{"80/tcp"},
	WaitingFor:   wait.ForHTTP("/"),
}
nginxC, _ := GenericContainer(ctx, GenericContainerRequest{
	ContainerRequest: req,
	Started:          true,
})
defer nginxC.Terminate(ctx)

Output:

func (*DockerProvider) CreateNetwork added in v0.0.7 

func (p *DockerProvider) CreateNetwork(ctx context.Context, req NetworkRequest) (Network, error)

CreateNetwork returns the object representing a new network identified by its name

func (*DockerProvider) GetGatewayIP added in v0.8.0 

func (p *DockerProvider) GetGatewayIP(ctx context.Context) (string, error)

func (*DockerProvider) GetNetwork added in v0.0.7 

func (p *DockerProvider) GetNetwork(ctx context.Context, req NetworkRequest) (types.NetworkResource, error)

GetNetwork returns the object representing the network identified by its name

func (*DockerProvider) Health added in v0.7.0 

func (p *DockerProvider) Health(ctx context.Context) (err error)

Health measure the healthiness of the provider. Right now we leverage the docker-client ping endpoint to see if the daemon is reachable.

func (*DockerProvider) RunContainer 

func (p *DockerProvider) RunContainer(ctx context.Context, req ContainerRequest) (Container, error)

RunContainer takes a RequestContainer as input and it runs a container via the docker sdk

type ExecError added in v0.5.1 

type ExecError struct {
	Command []string
	Error   error
	Stdout  error
	Stderr  error
}

ExecError is super struct that holds any information about an execution error, so the client code can handle the result

type FileFromContainer added in v0.12.0 

type FileFromContainer struct {
	// contains filtered or unexported fields
}

func (*FileFromContainer) Close added in v0.12.0 

func (fc *FileFromContainer) Close() error

func (*FileFromContainer) Read added in v0.12.0 

func (fc *FileFromContainer) Read(b []byte) (int, error)

type FromDockerfile added in v0.0.8 

type FromDockerfile struct {
	Context        string             // the path to the context of of the docker build
	ContextArchive io.Reader          // the tar archive file to send to docker that contains the build context
	Dockerfile     string             // the path from the context to the Dockerfile for the image, defaults to "Dockerfile"
	BuildArgs      map[string]*string // enable user to pass build args to docker daemon
	PrintBuildLog  bool               // enable user to print build log
}

FromDockerfile represents the parameters needed to build an image from a Dockerfile rather than using a pre-built one

type GenericContainerRequest 

type GenericContainerRequest struct {
	ContainerRequest              // embedded request for provider
	Started          bool         // whether to auto-start the container
	ProviderType     ProviderType // which provider to use, Docker if empty
}

GenericContainerRequest represents parameters to a generic container

type GenericNetworkRequest added in v0.5.0 

type GenericNetworkRequest struct {
	NetworkRequest              // embedded request for provider
	ProviderType   ProviderType // which provider to use, Docker if empty
}

GenericNetworkRequest represents parameters to a generic network

type GenericProvider added in v0.0.7 

type GenericProvider interface {
	ContainerProvider
	NetworkProvider
}

GenericProvider represents an abstraction for container and network providers

type ImageBuildInfo added in v0.0.8 

type ImageBuildInfo interface {
	GetContext() (io.Reader, error)   // the path to the build context
	GetDockerfile() string            // the relative path to the Dockerfile, including the fileitself
	ShouldPrintBuildLog() bool        // allow build log to be printed to stdout
	ShouldBuildImage() bool           // return true if the image needs to be built
	GetBuildArgs() map[string]*string // return the environment args used to build the from Dockerfile
}

ImageBuildInfo defines what is needed to build an image

type LocalDockerCompose added in v0.5.1 

type LocalDockerCompose struct {
	Executable       string
	ComposeFilePaths []string

	Identifier string
	Cmd        []string
	Env        map[string]string
	Services   map[string]interface{}

	WaitStrategyMap map[waitService]wait.Strategy
	// contains filtered or unexported fields
}

LocalDockerCompose represents a Docker Compose execution using local binary docker-compose or docker-compose.exe, depending on the underlying platform

Example 
_ = LocalDockerCompose{
	Executable: "docker-compose",
	ComposeFilePaths: []string{
		"/path/to/docker-compose.yml",
		"/path/to/docker-compose-1.yml",
		"/path/to/docker-compose-2.yml",
		"/path/to/docker-compose-3.yml",
	},
	Identifier: "my_project",
	Cmd: []string{
		"up", "-d",
	},
	Env: map[string]string{
		"FOO": "foo",
		"BAR": "bar",
	},
}

Output:

func NewLocalDockerCompose added in v0.5.1 

func NewLocalDockerCompose(filePaths []string, identifier string) *LocalDockerCompose

NewLocalDockerCompose returns an instance of the local Docker Compose, using an array of Docker Compose file paths and an identifier for the Compose execution.

It will iterate through the array adding '-f compose-file-path' flags to the local Docker Compose execution. The identifier represents the name of the execution, which will define the name of the underlying Docker network and the name of the running Compose services.

Example 
path := "/path/to/docker-compose.yml"

_ = NewLocalDockerCompose([]string{path}, "my_project")

Output:

func (*LocalDockerCompose) Down added in v0.5.1 

func (dc *LocalDockerCompose) Down() ExecError

Down executes docker-compose down

Example 
path := "/path/to/docker-compose.yml"

compose := NewLocalDockerCompose([]string{path}, "my_project")

execError := compose.WithCommand([]string{"up", "-d"}).Invoke()
if execError.Error != nil {
	_ = fmt.Errorf("Failed when running: %v", execError.Command)
}

execError = compose.Down()
if execError.Error != nil {
	_ = fmt.Errorf("Failed when running: %v", execError.Command)
}

Output:

func (*LocalDockerCompose) Invoke added in v0.5.1 

func (dc *LocalDockerCompose) Invoke() ExecError

Invoke invokes the docker compose

Example 
path := "/path/to/docker-compose.yml"

compose := NewLocalDockerCompose([]string{path}, "my_project")

execError := compose.
	WithCommand([]string{"up", "-d"}).
	WithEnv(map[string]string{
		"bar": "BAR",
	}).
	Invoke()
if execError.Error != nil {
	_ = fmt.Errorf("Failed when running: %v", execError.Command)
}

Output:

func (*LocalDockerCompose) WaitForService added in v0.12.0 

func (dc *LocalDockerCompose) WaitForService(service string, strategy wait.Strategy) DockerCompose

WaitForService sets the strategy for the service that is to be waited on

func (*LocalDockerCompose) WithCommand added in v0.5.1 

func (dc *LocalDockerCompose) WithCommand(cmd []string) DockerCompose

WithCommand assigns the command

Example 
path := "/path/to/docker-compose.yml"

compose := NewLocalDockerCompose([]string{path}, "my_project")

compose.WithCommand([]string{"up", "-d"})

Output:

func (*LocalDockerCompose) WithEnv added in v0.5.1 

func (dc *LocalDockerCompose) WithEnv(env map[string]string) DockerCompose

WithEnv assigns the environment

Example 
path := "/path/to/docker-compose.yml"

compose := NewLocalDockerCompose([]string{path}, "my_project")

compose.WithEnv(map[string]string{
	"FOO": "foo",
	"BAR": "bar",
})

Output:

func (*LocalDockerCompose) WithExposedService added in v0.11.0 

func (dc *LocalDockerCompose) WithExposedService(service string, port int, strategy wait.Strategy) DockerCompose

WithExposedService sets the strategy for the service that is to be waited on. If multiple strategies are given for a single service running on different ports, both strategies will be applied on the same container

type Log added in v0.3.0 

type Log struct {
	LogType string
	Content []byte
}

Log represents a message that was created by a process, LogType is either "STDOUT" or "STDERR", Content is the byte contents of the message itself

type LogConsumer added in v0.3.0 

type LogConsumer interface {
	Accept(Log)
}

LogConsumer represents any object that can handle a Log, it is up to the LogConsumer instance what to do with the log

type Network added in v0.0.7 

type Network interface {
	Remove(context.Context) error // removes the network
}

Network allows getting info about a single network instance

func GenericNetwork added in v0.5.0 

func GenericNetwork(ctx context.Context, req GenericNetworkRequest) (Network, error)

GenericNetwork creates a generic network with parameters

type NetworkProvider added in v0.0.7 

type NetworkProvider interface {
	CreateNetwork(context.Context, NetworkRequest) (Network, error)            // create a network
	GetNetwork(context.Context, NetworkRequest) (types.NetworkResource, error) // get a network
}

NetworkProvider allows the creation of networks on an arbitrary system

type NetworkRequest added in v0.0.7 

type NetworkRequest struct {
	Driver         string
	CheckDuplicate bool
	Internal       bool
	EnableIPv6     bool
	Name           string
	Labels         map[string]string
	Attachable     bool

	SkipReaper  bool   // indicates whether we skip setting up a reaper for this
	ReaperImage string //alternative reaper registry
}

NetworkRequest represents the parameters used to get a network

type ProviderType 

type ProviderType int

ProviderType is an enum for the possible providers 

const (
	ProviderDocker ProviderType = iota // Docker is default = 0
)

possible provider types

func (ProviderType) GetProvider 

func (t ProviderType) GetProvider() (GenericProvider, error)

GetProvider provides the provider implementation for a certain type

type Reaper 

type Reaper struct {
	Provider  ReaperProvider
	SessionID string
	Endpoint  string
}

Reaper is used to start a sidecar container that cleans up resources

func NewReaper 

func NewReaper(ctx context.Context, sessionID string, provider ReaperProvider, reaperImageName string) (*Reaper, error)

NewReaper creates a Reaper with a sessionID to identify containers and a provider to use

func (*Reaper) Connect 

func (r *Reaper) Connect() (chan bool, error)

Connect runs a goroutine which can be terminated by sending true into the returned channel

func (*Reaper) Labels 

func (r *Reaper) Labels() map[string]string

Labels returns the container labels to use so that this Reaper cleans them up

type ReaperProvider 

type ReaperProvider interface {
	RunContainer(ctx context.Context, req ContainerRequest) (Container, error)
}

ReaperProvider represents a provider for the reaper to run itself with The ContainerProvider interface should usually satisfy this as well, so it is pluggable

type TestContainersConfig added in v0.12.0 

type TestContainersConfig struct {
	Host      string `properties:"docker.host,default="`
	TLSVerify int    `properties:"docker.tls.verify,default=0"`
	CertPath  string `properties:"docker.cert.path,default="`
}

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