remove pkg/testutil/loopback_linux.go and use continuity/testutil/loopback

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

mount/lookup_linux_test.go

@@ -16,14 +16,7 @@
    limitations under the License.
 */
 
-// FIXME: we can't put this test to the mount package:
+package mount
-// import cycle not allowed in test
-// package github.com/containerd/containerd/mount (test)
-//         imports github.com/containerd/containerd/pkg/testutil
-//         imports github.com/containerd/containerd/mount
-//
-// NOTE: we can't have this as lookup_test (compilation fails)
-package lookuptest
 
 import (
 	"fmt"
@@ -34,14 +27,16 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/containerd/containerd/mount"
+	// containerd/pkg/testutil has circular dependency on this mount pkg.
-	"github.com/containerd/containerd/pkg/testutil"
+	// so we use continuity/testutil instead.
+	"github.com/containerd/continuity/testutil"
+	"github.com/containerd/continuity/testutil/loopback"
 	"gotest.tools/assert"
 )
 
 func checkLookup(t *testing.T, fsType, mntPoint, dir string) {
 	t.Helper()
-	info, err := mount.Lookup(dir)
+	info, err := Lookup(dir)
 	assert.NilError(t, err)
 	assert.Equal(t, fsType, info.FSType)
 	assert.Equal(t, mntPoint, info.Mountpoint)
@@ -55,7 +50,7 @@ func testLookup(t *testing.T, fsType string) {
 	}
 	defer os.RemoveAll(mnt)
 
-	deviceName, cleanupDevice, err := testutil.NewLoopback(100 << 20) // 100 MB
+	deviceName, cleanupDevice, err := loopback.New(100 << 20) // 100 MB
 	if err != nil {
 		t.Fatal(err)
 	}

snapshots/btrfs/btrfs_test.go

@@ -31,6 +31,7 @@ import (
 	"github.com/containerd/containerd/pkg/testutil"
 	"github.com/containerd/containerd/snapshots"
 	"github.com/containerd/containerd/snapshots/testsuite"
+	"github.com/containerd/continuity/testutil/loopback"
 	"github.com/pkg/errors"
 	"golang.org/x/sys/unix"
 )
@@ -51,7 +52,7 @@ func boltSnapshotter(t *testing.T) func(context.Context, string) (snapshots.Snap
 		if os.Getpagesize() > 4096 {
 			loopbackSize = int64(650 << 20) // 650 MB
 		}
-		deviceName, cleanupDevice, err := testutil.NewLoopback(loopbackSize)
+		deviceName, cleanupDevice, err := loopback.New(loopbackSize)
 
 		if err != nil {
 			return nil, nil, err

snapshots/overlay/check_test.go

@@ -25,6 +25,7 @@ import (
 	"testing"
 
 	"github.com/containerd/containerd/pkg/testutil"
+	"github.com/containerd/continuity/testutil/loopback"
 )
 
 func testOverlaySupported(t testing.TB, expected bool, mkfs ...string) {
@@ -35,7 +36,7 @@ func testOverlaySupported(t testing.TB, expected bool, mkfs ...string) {
 	}
 	defer os.RemoveAll(mnt)
 
-	deviceName, cleanupDevice, err := testutil.NewLoopback(100 << 20) // 100 MB
+	deviceName, cleanupDevice, err := loopback.New(100 << 20) // 100 MB
 	if err != nil {
 		t.Fatal(err)
 	}

vendor.conf

@@ -4,7 +4,7 @@ github.com/containerd/cgroups 5e610833b72089b37d0e615de9a92dfc043757c2
 github.com/containerd/typeurl a93fcdb778cd272c6e9b3028b2f42d813e785d40
 github.com/containerd/fifo 3d5202aec260678c48179c56f40e6f38a095738c
 github.com/containerd/btrfs 2e1aa0ddf94f91fa282b6ed87c23bf0d64911244
-github.com/containerd/continuity 7f53d412b9eb1cbf744c2063185d703a0ee34700
+github.com/containerd/continuity bd77b46c8352f74eb12c85bdc01f4b90f69d66b4
 github.com/coreos/go-systemd 48702e0da86bd25e76cfef347e2adeb434a0d0a6
 github.com/docker/go-metrics 4ea375f7759c82740c893fc030bc37088d2ec098
 github.com/docker/go-events 9461782956ad83b30282bf90e31fa6a70c255ba9

vendor/github.com/containerd/continuity/testutil/helpers.go

@@ -0,0 +1,27 @@
+/*
+   Copyright The containerd 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 testutil
+
+import (
+	"flag"
+)
+
+var rootEnabled bool
+
+func init() {
+	flag.BoolVar(&rootEnabled, "test.root", false, "enable tests that require root")
+}

vendor/github.com/containerd/continuity/testutil/helpers_unix.go

@@ -0,0 +1,57 @@
+// +build !windows
+
+/*
+   Copyright The containerd 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 testutil
+
+import (
+	"os"
+	"testing"
+
+	"golang.org/x/sys/unix"
+)
+
+// Unmount unmounts a given mountPoint and sets t.Error if it fails
+func Unmount(t *testing.T, mountPoint string) {
+	t.Log("unmount", mountPoint)
+	if err := unmountAll(mountPoint); err != nil {
+		t.Error("Could not umount", mountPoint, err)
+	}
+}
+
+// RequiresRoot skips tests that require root, unless the test.root flag has
+// been set
+func RequiresRoot(t testing.TB) {
+	if !rootEnabled {
+		t.Skip("skipping test that requires root")
+		return
+	}
+	if os.Getuid() != 0 {
+		t.Error("This test must be run as root.")
+	}
+}
+
+func unmountAll(mountpoint string) error {
+	for {
+		if err := unix.Unmount(mountpoint, unmountFlags); err != nil {
+			if err == unix.EINVAL {
+				return nil
+			}
+			return err
+		}
+	}
+}

vendor/github.com/containerd/continuity/testutil/helpers_windows.go

@@ -0,0 +1,32 @@
+/*
+   Copyright The containerd 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 testutil
+
+import "testing"
+
+// RequiresRoot does nothing on Windows
+func RequiresRoot(t testing.TB) {
+}
+
+// RequiresRootM is similar to RequiresRoot but intended to be called from *testing.M.
+func RequiresRootM() {
+}
+
+// Unmount unmounts a given mountPoint and sets t.Error if it fails
+// Does nothing on Windows
+func Unmount(t *testing.T, mountPoint string) {
+}

vendor/github.com/containerd/continuity/testutil/loopback/loopback_linux.go

@@ -16,7 +16,7 @@
    limitations under the License.
 */
 
-package testutil
+package loopback
 
 import (
 	"io/ioutil"
@@ -28,8 +28,8 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-// NewLoopback creates a loopback device, and returns its device name (/dev/loopX), and its clean-up function.
+// New creates a loopback device, and returns its device name (/dev/loopX), and its clean-up function.
-func NewLoopback(size int64) (string, func() error, error) {
+func New(size int64) (string, func() error, error) {
 	// create temporary file for the disk image
 	file, err := ioutil.TempFile("", "containerd-test-loopback")
 	if err != nil {

vendor/github.com/containerd/continuity/testutil/mount_linux.go

@@ -14,6 +14,8 @@
    limitations under the License.
 */
 
-package lookuptest
+package testutil
 
-// FIXME: without this dummy file, `make build` fails with "no buildable Go source files" error
+import "golang.org/x/sys/unix"
+
+const unmountFlags int = unix.MNT_DETACH

vendor/github.com/containerd/continuity/testutil/mount_other.go

@@ -0,0 +1,21 @@
+// +build !linux,!windows
+
+/*
+   Copyright The containerd 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 testutil
+
+const unmountFlags int = 0