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helpers.go
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/
helpers.go
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package testutil
import (
"flag"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"testing"
"github.com/containerd/containerd/mount"
"github.com/stretchr/testify/assert"
)
var rootEnabled bool
func init() {
flag.BoolVar(&rootEnabled, "test.root", false, "enable tests that require root")
}
// 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 := mount.Unmount(mountPoint, 0); 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
}
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 0 != os.Getuid() {
fmt.Fprintln(os.Stderr, "This test must be run as root.")
os.Exit(1)
}
}
// DumpDir will log out all of the contents of the provided directory to
// testing logger.
//
// Use this in a defer statement within tests that may allocate and exercise a
// temporary directory. Immensely useful for sanity checking and debugging
// failing tests.
//
// One should still test that contents are as expected. This is only a visual
// tool to assist when things don't go your way.
func DumpDir(t *testing.T, root string) {
if err := filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
if err != nil {
return err
}
if fi.Mode()&os.ModeSymlink != 0 {
target, err := os.Readlink(path)
if err != nil {
return err
}
t.Log(fi.Mode(), path, "->", target)
} else if fi.Mode().IsRegular() {
p, err := ioutil.ReadFile(path)
if err != nil {
t.Logf("error reading file: %v", err)
return nil
}
if len(p) > 64 { // just display a little bit.
p = p[:64]
}
t.Log(fi.Mode(), path, "[", strconv.Quote(string(p)), "...]")
} else {
t.Log(fi.Mode(), path)
}
return nil
}); err != nil {
t.Fatalf("error dumping directory: %v", err)
}
}