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container.go
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container.go
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//go:build !freebsd
// +build !freebsd
package testutil
import (
"context"
"fmt"
"strings"
"github.com/docker/go-connections/nat"
testcontainers "github.com/testcontainers/testcontainers-go"
wait "github.com/testcontainers/testcontainers-go/wait"
)
type TestLogConsumer struct {
Msgs []string
}
func (g *TestLogConsumer) Accept(l testcontainers.Log) {
g.Msgs = append(g.Msgs, string(l.Content))
}
type Container struct {
ctx context.Context
container testcontainers.Container
WaitingFor wait.Strategy
Ports map[string]string
Env map[string]string
BindMounts map[string]string
Image string
Name string
Address string
ExposedPorts []string
Logs TestLogConsumer
Networks []string
Entrypoint []string
}
func (c *Container) Start() error {
c.ctx = context.Background()
containerMounts := make([]testcontainers.ContainerMount, 0, len(c.BindMounts))
for k, v := range c.BindMounts {
containerMounts = append(containerMounts, testcontainers.BindMount(v, testcontainers.ContainerMountTarget(k)))
}
req := testcontainers.GenericContainerRequest{
ContainerRequest: testcontainers.ContainerRequest{
Mounts: testcontainers.Mounts(containerMounts...),
Entrypoint: c.Entrypoint,
Env: c.Env,
ExposedPorts: c.ExposedPorts,
Image: c.Image,
Name: c.Name,
Networks: c.Networks,
WaitingFor: c.WaitingFor,
},
Started: true,
}
container, err := testcontainers.GenericContainer(c.ctx, req)
if err != nil {
return fmt.Errorf("container failed to start: %w", err)
}
c.container = container
c.Logs = TestLogConsumer{
Msgs: []string{},
}
c.container.FollowOutput(&c.Logs)
err = c.container.StartLogProducer(c.ctx)
if err != nil {
return fmt.Errorf("log producer failed: %w", err)
}
c.Address = "localhost"
err = c.LookupMappedPorts()
if err != nil {
_ = c.Terminate()
return fmt.Errorf("port lookup failed: %w", err)
}
return nil
}
// create a lookup table of exposed ports to mapped ports
func (c *Container) LookupMappedPorts() error {
if len(c.ExposedPorts) == 0 {
return nil
}
if len(c.Ports) == 0 {
c.Ports = make(map[string]string)
}
for _, port := range c.ExposedPorts {
// strip off leading host port: 80:8080 -> 8080
if strings.Contains(port, ":") {
port = strings.Split(port, ":")[1]
}
// strip off the transport: 80/tcp -> 80
if strings.Contains(port, "/") {
port = strings.Split(port, "/")[0]
}
p, err := c.container.MappedPort(c.ctx, nat.Port(port))
if err != nil {
return fmt.Errorf("failed to find '%s' - %w", port, err)
}
fmt.Printf("mapped container port '%s' to host port '%s'\n", port, p.Port())
c.Ports[port] = p.Port()
}
return nil
}
func (c *Container) Exec(cmds []string) (int, error) {
return c.container.Exec(c.ctx, cmds)
}
func (c *Container) PrintLogs() {
fmt.Println("--- Container Logs Start ---")
for _, msg := range c.Logs.Msgs {
fmt.Print(msg)
}
fmt.Println("--- Container Logs End ---")
}
func (c *Container) Terminate() error {
err := c.container.StopLogProducer()
if err != nil {
fmt.Println(err)
}
err = c.container.Terminate(c.ctx)
if err != nil {
fmt.Printf("failed to terminate the container: %s", err)
}
c.PrintLogs()
return nil
}