ceph-csi/vendor/github.com/peterbourgon/diskv/issues_test.go

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2018-01-09 18:57:14 +00:00
package diskv
import (
"bytes"
"io/ioutil"
"sync"
"testing"
"time"
)
// ReadStream from cache shouldn't panic on a nil dereference from a nonexistent
// Compression :)
func TestIssue2A(t *testing.T) {
d := New(Options{
BasePath: "test-issue-2a",
Transform: func(string) []string { return []string{} },
CacheSizeMax: 1024,
})
defer d.EraseAll()
input := "abcdefghijklmnopqrstuvwxy"
key, writeBuf, sync := "a", bytes.NewBufferString(input), false
if err := d.WriteStream(key, writeBuf, sync); err != nil {
t.Fatal(err)
}
for i := 0; i < 2; i++ {
began := time.Now()
rc, err := d.ReadStream(key, false)
if err != nil {
t.Fatal(err)
}
buf, err := ioutil.ReadAll(rc)
if err != nil {
t.Fatal(err)
}
if !cmpBytes(buf, []byte(input)) {
t.Fatalf("read #%d: '%s' != '%s'", i+1, string(buf), input)
}
rc.Close()
t.Logf("read #%d in %s", i+1, time.Since(began))
}
}
// ReadStream on a key that resolves to a directory should return an error.
func TestIssue2B(t *testing.T) {
blockTransform := func(s string) []string {
transformBlockSize := 3
sliceSize := len(s) / transformBlockSize
pathSlice := make([]string, sliceSize)
for i := 0; i < sliceSize; i++ {
from, to := i*transformBlockSize, (i*transformBlockSize)+transformBlockSize
pathSlice[i] = s[from:to]
}
return pathSlice
}
d := New(Options{
BasePath: "test-issue-2b",
Transform: blockTransform,
CacheSizeMax: 0,
})
defer d.EraseAll()
v := []byte{'1', '2', '3'}
if err := d.Write("abcabc", v); err != nil {
t.Fatal(err)
}
_, err := d.ReadStream("abc", false)
if err == nil {
t.Fatal("ReadStream('abc') should return error")
}
t.Logf("ReadStream('abc') returned error: %v", err)
}
// Ensure ReadStream with direct=true isn't racy.
func TestIssue17(t *testing.T) {
var (
basePath = "test-data"
)
dWrite := New(Options{
BasePath: basePath,
CacheSizeMax: 0,
})
defer dWrite.EraseAll()
dRead := New(Options{
BasePath: basePath,
CacheSizeMax: 50,
})
cases := map[string]string{
"a": `1234567890`,
"b": `2345678901`,
"c": `3456789012`,
"d": `4567890123`,
"e": `5678901234`,
}
for k, v := range cases {
if err := dWrite.Write(k, []byte(v)); err != nil {
t.Fatalf("during write: %s", err)
}
dRead.Read(k) // ensure it's added to cache
}
var wg sync.WaitGroup
start := make(chan struct{})
for k, v := range cases {
wg.Add(1)
go func(k, v string) {
<-start
dRead.ReadStream(k, true)
wg.Done()
}(k, v)
}
close(start)
wg.Wait()
}