mv internal/testutil pkg/testutil

The package is consumed by several snapshotter plugins

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

pkg/testutil/helpers_unix.go

@@ -0,0 +1,48 @@
+//go: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 (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// 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")
+	}
+	assert.Equal(t, 0, os.Getuid(), "This test must be run as root.")
+}
+
+// RequiresRootM is similar to RequiresRoot but intended to be called from *testing.M.
+func RequiresRootM() {
+	if !rootEnabled {
+		fmt.Fprintln(os.Stderr, "skipping test that requires root")
+		os.Exit(0)
+	}
+	if os.Getuid() != 0 {
+		fmt.Fprintln(os.Stderr, "This test must be run as root.")
+		os.Exit(1)
+	}
+}