testutil: expose underlying docker address for supported workers

Signed-off-by: Justin Chadwell <[email protected]>

Author: jedevc

util/testutil/integration/dockerd.go

@@ -212,6 +212,7 @@ func (c Moby) New(ctx context.Context, cfg *BackendConfig) (b Backend, cl func()
 
 	return backend{
 		address:             "unix://" + listener.Addr().String(),
+		dockerAddress:       d.Sock(),
 		rootless:            c.IsRootless,
 		isDockerd:           true,
 		unsupportedFeatures: c.Unsupported,

util/testutil/integration/run.go

@@ -35,6 +35,7 @@ func init() {
 // Backend is the minimal interface that describes a testing backend.
 type Backend interface {
 	Address() string
+	DockerAddress() string
 	ContainerdAddress() string
 	Rootless() bool
 	Snapshotter() string

util/testutil/integration/sandbox.go

@@ -22,6 +22,7 @@ const buildkitdConfigFile = "buildkitd.toml"
 
 type backend struct {
 	address             string
+	dockerAddress       string
 	containerdAddress   string
 	rootless            bool
 	snapshotter         string
@@ -33,6 +34,10 @@ func (b backend) Address() string {
 	return b.address
 }
 
+func (b backend) DockerAddress() string {
+	return b.dockerAddress
+}
+
 func (b backend) ContainerdAddress() string {
 	return b.containerdAddress
 }