test: add basic integration tests

Signed-off-by: Justin Chadwell <me@jedevc.com>

vendor/github.com/moby/buildkit/util/testutil/integration/minio.go

@@ -0,0 +1,116 @@
+package integration
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"os"
+	"os/exec"
+	"testing"
+	"time"
+
+	"github.com/pkg/errors"
+)
+
+const (
+	minioBin = "minio"
+	mcBin    = "mc"
+)
+
+type MinioOpts struct {
+	Region          string
+	AccessKeyID     string
+	SecretAccessKey string
+}
+
+func NewMinioServer(t *testing.T, sb Sandbox, opts MinioOpts) (address string, bucket string, cl func() error, err error) {
+	t.Helper()
+	bucket = randomString(10)
+
+	if _, err := exec.LookPath(minioBin); err != nil {
+		return "", "", nil, errors.Wrapf(err, "failed to lookup %s binary", minioBin)
+	}
+	if _, err := exec.LookPath(mcBin); err != nil {
+		return "", "", nil, errors.Wrapf(err, "failed to lookup %s binary", mcBin)
+	}
+
+	deferF := &multiCloser{}
+	cl = deferF.F()
+
+	defer func() {
+		if err != nil {
+			deferF.F()()
+			cl = nil
+		}
+	}()
+
+	l, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		return "", "", nil, err
+	}
+
+	addr := l.Addr().String()
+	if err = l.Close(); err != nil {
+		return "", "", nil, err
+	}
+	address = "http://" + addr
+
+	// start server
+	cmd := exec.Command(minioBin, "server", "--json", "--address", addr, t.TempDir())
+	cmd.Env = append(os.Environ(), []string{
+		"MINIO_ROOT_USER=" + opts.AccessKeyID,
+		"MINIO_ROOT_PASSWORD=" + opts.SecretAccessKey,
+	}...)
+	minioStop, err := startCmd(cmd, sb.Logs())
+	if err != nil {
+		return "", "", nil, err
+	}
+	if err = waitMinio(address, 15*time.Second); err != nil {
+		minioStop()
+		return "", "", nil, errors.Wrapf(err, "minio did not start up: %s", formatLogs(sb.Logs()))
+	}
+	deferF.append(minioStop)
+
+	// create alias config
+	alias := randomString(10)
+	cmd = exec.Command(mcBin, "alias", "set", alias, address, opts.AccessKeyID, opts.SecretAccessKey)
+	if err := runCmd(cmd, sb.Logs()); err != nil {
+		return "", "", nil, err
+	}
+	deferF.append(func() error {
+		return exec.Command(mcBin, "alias", "rm", alias).Run()
+	})
+
+	// create bucket
+	cmd = exec.Command(mcBin, "mb", "--region", opts.Region, fmt.Sprintf("%s/%s", alias, bucket)) // #nosec G204
+	if err := runCmd(cmd, sb.Logs()); err != nil {
+		return "", "", nil, err
+	}
+
+	// trace
+	cmd = exec.Command(mcBin, "admin", "trace", "--json", alias)
+	traceStop, err := startCmd(cmd, sb.Logs())
+	if err != nil {
+		return "", "", nil, err
+	}
+	deferF.append(traceStop)
+
+	return
+}
+
+func waitMinio(address string, d time.Duration) error {
+	step := 1 * time.Second
+	i := 0
+	for {
+		if resp, err := http.Get(fmt.Sprintf("%s/minio/health/live", address)); err == nil {
+			resp.Body.Close()
+			break
+		}
+		i++
+		if time.Duration(i)*step > d {
+			return errors.Errorf("failed dialing: %s", address)
+		}
+		time.Sleep(step)
+	}
+	return nil
+}