forked from graymeta/stow
/
test.go
384 lines (325 loc) · 9.71 KB
/
test.go
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package test
import (
"bytes"
"errors"
"fmt"
"io"
"io/ioutil"
"math/rand"
"net/http"
"os"
"os/exec"
"reflect"
"runtime"
"strconv"
"strings"
"testing"
"time"
"github.com/cheekybits/is"
"github.com/aeppert/stow"
)
// All runs a generic suite of tests for Stow storage
// implementations.
// Passing the kind name and a configuration is enough,
// because implementations should have registered themselves
// via stow.Register.
// Locations should be empty.
func All(t *testing.T, kind string, config stow.Config) {
is := is.New(t)
isWindows := false
if runtime.GOOS == "windows" {
isWindows = true
}
location, err := stow.Dial(kind, config)
is.NoErr(err)
is.OK(location)
// testing for file descriptors won't work on Windows
var startFDs int
var fdsStart []byte
if !isWindows {
startFDs, fdsStart = totalNetFDs(t)
}
defer func() {
err := location.Close()
is.NoErr(err)
if !isWindows {
// Close Idle HTTP connectors before counting TCP File Descriptors
if tr, ok := http.DefaultTransport.(interface {
CloseIdleConnections()
}); ok {
tr.CloseIdleConnections()
}
endFDs, fds := totalNetFDs(t)
diffFDs := endFDs - startFDs
if diffFDs > 0 {
t.Log("File Descriptors test start")
t.Log(string(fdsStart))
t.Log("File Descriptors test end")
t.Log(string(fds))
t.Fatalf("Leaked %d TCP file descriptor", diffFDs)
}
}
}()
// create two containers
c1 := createContainer(is, location, "stowtest"+randName(10))
c2 := createContainer(is, location, "stowtest"+randName(10))
c3 := createContainer(is, location, "stowtest"+randName(10))
is.NotEqual(c1.ID(), c2.ID())
defer func() {
err := location.RemoveContainer(c1.ID())
is.NoErr(err)
err = location.RemoveContainer(c2.ID())
is.NoErr(err)
err = location.RemoveContainer(c3.ID())
is.NoErr(err)
}()
// Item metadata. Keys are usually transposed differently depending on the sdk.
md1 := map[string]interface{}{"stowmetadata": "foo"}
// add three items to c1 + add metadata to one item, assert if the implementation allows.
// Tests metadata retrieval on PUTs.
item1, skip1 := putItem(is, c1, "a_first/the item", "item one", md1)
is.OK(item1)
if !skip1 {
is.NoErr(checkMetadata(t, is, item1, md1))
}
item2, _ := putItem(is, c1, "a_second/the item", "item two", nil)
is.OK(item2)
item3, _ := putItem(is, c1, "the_third/the item", "item three", nil)
is.OK(item3)
defer func() {
err := c1.RemoveItem(item1.ID())
is.NoErr(err)
err = c1.RemoveItem(item2.ID())
is.NoErr(err)
err = c1.RemoveItem(item3.ID())
is.NoErr(err)
}()
// make sure we can get a small set of paginated results
items, cursor, err := c1.Items(stow.NoPrefix, stow.CursorStart, 1)
is.NoErr(err)
is.Equal(len(items), 1)
is.NotEqual(cursor, "")
// get the items with a prefix (should only get 2)
items, _, err = c1.Items("a_", stow.CursorStart, 100)
is.NoErr(err)
is.Equal(len(items), 2)
// make sure we get these three items from the container
items, _, err = c1.Items(stow.NoPrefix, stow.CursorStart, 100)
is.NoErr(err)
is.Equal(len(items), 3)
// Test metadata retrieval on Items() method
if !skip1 {
is.NoErr(checkMetadata(t, is, items[0], md1))
}
// make sure the items are identical
is.OK(item1.ID())
is.OK(item1.Name())
is.Equal(items[0].ID(), item1.ID())
is.Equal(items[0].Name(), item1.Name())
is.Equal(size(is, items[0]), 8)
is.Equal(readItemContents(is, item1), "item one")
is.NoErr(acceptableTime(t, is, items[0], item1))
is.OK(item2.ID())
is.OK(item2.Name())
is.Equal(items[1].ID(), item2.ID())
is.Equal(items[1].Name(), item2.Name())
is.Equal(size(is, items[1]), 8)
is.Equal(readItemContents(is, item2), "item two")
is.NoErr(acceptableTime(t, is, items[1], item2))
is.OK(item3.ID())
is.OK(item3.Name())
is.Equal(items[2].ID(), item3.ID())
is.Equal(items[2].Name(), item3.Name())
is.Equal(size(is, items[2]), 10)
is.Equal(readItemContents(is, item3), "item three")
is.NoErr(acceptableTime(t, is, items[2], item3))
// check ETags from items retrieved by the Items() method
is.OK(etag(t, is, items[0]))
is.OK(etag(t, is, items[1]))
is.OK(etag(t, is, items[2]))
// get container by ID
c1copy, err := location.Container(c1.ID())
is.NoErr(err)
is.OK(c1copy)
is.Equal(c1copy.ID(), c1.ID())
// get container that doesn't exist
noContainer, err := location.Container(c1.ID() + "nope")
is.Equal(stow.ErrNotFound, err)
is.Nil(noContainer)
// get item by ID
item1copy, err := c1copy.Item(item1.ID())
is.NoErr(err)
is.OK(item1copy)
is.Equal(item1copy.ID(), item1.ID())
is.Equal(item1copy.Name(), item1.Name())
is.Equal(size(is, item1copy), size(is, item1))
is.Equal(readItemContents(is, item1copy), "item one")
is.OK(etag(t, is, item1copy))
if !skip1 {
is.NoErr(checkMetadata(t, is, item1copy, md1))
}
// get an item by ID that doesn't exist
noItem, err := c1copy.Item(item1.ID() + "nope")
is.Equal(stow.ErrNotFound, err)
is.Nil(noItem)
// get items by URL
u1 := item1.URL()
item1b, err := location.ItemByURL(u1)
is.NoErr(err)
is.OK(item1b)
is.Equal(item1b.ID(), item1.ID())
is.Equal(etag(t, is, item1b), etag(t, is, item1copy))
// **************************************************
// Walking
// **************************************************
// test walking
var walkedItems []stow.Item
err = stow.Walk(c1, stow.NoPrefix, 100, func(item stow.Item, err error) error {
if err != nil {
return err
}
walkedItems = append(walkedItems, item)
return nil
})
is.NoErr(err)
is.Equal(len(walkedItems), 3)
is.Equal(readItemContents(is, walkedItems[0]), "item one")
is.Equal(readItemContents(is, walkedItems[1]), "item two")
is.Equal(readItemContents(is, walkedItems[2]), "item three")
// test walking with a prefix
walkedItems = make([]stow.Item, 0)
err = stow.Walk(c1, "a_", 100, func(item stow.Item, err error) error {
if err != nil {
return err
}
walkedItems = append(walkedItems, item)
return nil
})
is.NoErr(err)
is.Equal(len(walkedItems), 2)
is.Equal(readItemContents(is, walkedItems[0]), "item one")
is.Equal(readItemContents(is, walkedItems[1]), "item two")
// test walking error
testErr := errors.New("test error")
err = stow.Walk(c1, stow.NoPrefix, 100, func(item stow.Item, err error) error {
return testErr
})
is.Equal(testErr, err)
// container walking
found := 0
err = stow.WalkContainers(location, stow.NoPrefix, 100, func(c stow.Container, err error) error {
if err != nil {
return err
}
switch c.Name() {
case c1.Name(), c2.Name(), c3.Name():
found++
}
return nil
})
is.NoErr(err)
is.Equal(found, 3) // should find three items
}
func totalNetFDs(t *testing.T) (int, []byte) {
lsof, err := exec.Command("lsof", "-b", "-n", "-p", strconv.Itoa(os.Getpid())).Output()
if err != nil {
if err, ok := err.(*exec.ExitError); ok {
t.Log(string(err.Stderr))
}
t.Errorf("error finding or running lsof: %s", err.Error())
}
return bytes.Count(lsof, []byte("TCP")), lsof
}
func createContainer(is is.I, location stow.Location, name string) stow.Container {
container, err := location.CreateContainer(name)
is.NoErr(err)
is.OK(container)
is.OK(container.ID())
is.Equal(container.Name(), name)
return container
}
func putItem(is is.I, container stow.Container, name, content string, md map[string]interface{}) (stow.Item, bool) {
var skipAssertion bool // skip metadata assertion
item, err := container.Put(name, strings.NewReader(content), int64(len(content)), md)
// Metadata retrieval isn't supported
if stow.IsNotSupported(err) {
item, err = container.Put(name, strings.NewReader(content), int64(len(content)), nil)
skipAssertion = true
}
is.NoErr(err)
is.OK(item)
return item, skipAssertion
}
func readItemContents(is is.I, item stow.Item) string {
r, err := item.Open()
is.NoErr(err)
defer r.Close()
if s, ok := r.(io.Seeker); ok {
_, err = s.Seek(0, io.SeekEnd)
is.NoErr(err)
_, err = s.Seek(0, io.SeekStart)
is.NoErr(err)
}
b, err := ioutil.ReadAll(r)
is.NoErr(err)
return string(b)
}
func etag(t *testing.T, is is.I, item stow.Item) string {
etag, err := item.ETag()
is.NoErr(err)
t.Logf("ETag value: %s", etag)
if strings.HasPrefix(etag, `W/`) {
is.Failf(`Item(%s) Etag value (%s) contains weak string prefix W/`, item.Name(), etag)
} else if strings.HasPrefix(etag, `"`) || strings.HasSuffix(etag, `"`) {
is.Failf("Item(%s) Etag value (%s) contains quotation mark in prefix or suffix", item.Name(), etag)
}
return etag
}
func size(is is.I, item stow.Item) int64 {
size, err := item.Size()
is.NoErr(err)
return size
}
func acceptableTime(t *testing.T, is is.I, item1, item2 stow.Item) error {
item1LastMod, err := item1.LastMod()
is.NoErr(err)
item2LastMod, err := item2.LastMod()
is.NoErr(err)
timeDiff := item2LastMod.Sub(item1LastMod)
threshold := time.Duration(8 * time.Second)
if timeDiff > threshold {
t.Logf("LastModified time for item1: %s", item1LastMod.String())
t.Logf("LastModified time for item2: %s", item2LastMod.String())
t.Logf("Difference: %s", timeDiff.String())
return fmt.Errorf("last modified time exceeds threshold (%v)", threshold.Seconds())
}
return nil
}
func lastMod(is is.I, item stow.Item) time.Time {
lastMod, err := item.LastMod()
is.NoErr(err)
return lastMod
}
var letters = []rune("abcdefghijklmnopqrstuvwxyz")
func init() {
rand.Seed(int64(time.Now().Nanosecond()))
}
func randName(length int) string {
b := make([]rune, length)
for i := range b {
b[i] = letters[rand.Intn(len(letters))]
}
return string(b)
}
func checkMetadata(t *testing.T, is is.I, item stow.Item, md map[string]interface{}) error {
itemMD, err := item.Metadata()
if err != nil {
is.Failf("error retrieving item metadata: %v", err)
}
t.Logf("Item metadata: %v", itemMD)
t.Logf("Expected item metadata: %v", md)
if !reflect.DeepEqual(itemMD, md) {
return errors.New("metadata mismatch")
}
return nil
}