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testenv.go
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testenv.go
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// Copyright 2021 Monoskope Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package test
import (
"context"
"fmt"
"github.com/finleap-connect/monoskope/pkg/logger"
"github.com/ory/dockertest/v3"
dc "github.com/ory/dockertest/v3/docker"
_ "go.uber.org/automaxprocs"
)
type TestEnv struct {
pool *dockertest.Pool
Log logger.Logger
shutdown bool
keepExisting bool
resources map[string]*dockertest.Resource
}
func (t *TestEnv) CreateDockerPool(keepExisting bool) error {
t.Log.Info("Creating docker pool...")
pool, err := dockertest.NewPool("")
if err != nil {
return err
}
t.pool = pool
t.keepExisting = keepExisting
return nil
}
func (t *TestEnv) Retry(op func() error) error {
return t.pool.Retry(op)
}
func (t *TestEnv) Run(opts *dockertest.RunOptions) (*dockertest.Resource, error) {
res, present := t.pool.ContainerByName(opts.Name)
if present {
if t.keepExisting {
return res, nil
} else {
if err := t.pool.Purge(res); err != nil {
return nil, err
}
}
}
t.Log.Info(fmt.Sprintf("Starting docker container %s:%s ...", opts.Repository, opts.Tag))
res, err := t.pool.RunWithOptions(opts, func(config *dc.HostConfig) {
config.AutoRemove = true
config.RestartPolicy = dc.NeverRestart()
})
if err != nil {
return nil, err
}
t.resources[res.Container.Name] = res
if t.keepExisting {
err = res.Expire(500)
if err != nil {
return nil, err
}
}
containerLogger := logWriter{}
logOptions := dc.LogsOptions{
Container: opts.Name,
Follow: true,
OutputStream: containerLogger,
ErrorStream: containerLogger,
Stdout: true,
Stderr: true,
Context: context.Background(),
}
go func() {
err = t.pool.Client.Logs(logOptions)
if err != nil {
t.Log.Error(err, err.Error())
}
}()
return res, err
}
func (t *TestEnv) Purge(resource string) error {
res, present := t.pool.ContainerByName(resource)
if present {
return t.pool.Purge(res)
}
delete(t.resources, resource)
return nil
}
func NewTestEnv(envName string) *TestEnv {
log := logger.WithName(envName)
env := &TestEnv{
Log: log,
resources: make(map[string]*dockertest.Resource),
}
log.Info("Setting up testenv...")
return env
}
func (env *TestEnv) Shutdown() error {
if env.shutdown {
return nil
}
if !env.keepExisting {
if env.resources != nil {
for key, element := range env.resources {
env.Log.Info("Tearing down docker resource", "resource", key)
if err := env.pool.Purge(element); err != nil {
return err
}
}
}
}
env.shutdown = true
log := env.Log
log.Info("Tearing down testenv...")
return nil
}
type logWriter struct {
}
func (l logWriter) Write(p []byte) (n int, err error) {
fmt.Print(string(p))
return len(p), nil
}