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package chunk_cache
import (
"bytes"
"fmt"
"io/ioutil"
"math/rand"
"os"
"testing"
)
func TestOnDisk(t *testing.T) {
tmpDir, _ := ioutil.TempDir("", "c")
defer os.RemoveAll(tmpDir)
totalDiskSizeInKB := int64(32)
cache := NewTieredChunkCache(2, tmpDir, totalDiskSizeInKB, 1024)
writeCount := 5
type test_data struct {
data []byte
fileId string
size uint64
}
testData := make([]*test_data, writeCount)
for i := 0; i < writeCount; i++ {
buff := make([]byte, 1024)
rand.Read(buff)
testData[i] = &test_data{
data: buff,
fileId: fmt.Sprintf("1,%daabbccdd", i+1),
size: uint64(len(buff)),
}
cache.SetChunk(testData[i].fileId, testData[i].data)
// read back right after write
data := cache.GetChunk(testData[i].fileId, testData[i].size)
if bytes.Compare(data, testData[i].data) != 0 {
t.Errorf("failed to write to and read from cache: %d", i)
}
}
for i := 0; i < 2; i++ {
data := cache.GetChunk(testData[i].fileId, testData[i].size)
if bytes.Compare(data, testData[i].data) == 0 {
t.Errorf("old cache should have been purged: %d", i)
}
}
for i := 2; i < writeCount; i++ {
data := cache.GetChunk(testData[i].fileId, testData[i].size)
if bytes.Compare(data, testData[i].data) != 0 {
t.Errorf("failed to write to and read from cache: %d", i)
}
}
cache.Shutdown()
cache = NewTieredChunkCache(2, tmpDir, totalDiskSizeInKB, 1024)
for i := 0; i < 2; i++ {
data := cache.GetChunk(testData[i].fileId, testData[i].size)
if bytes.Compare(data, testData[i].data) == 0 {
t.Errorf("old cache should have been purged: %d", i)
}
}
for i := 2; i < writeCount; i++ {
if i == 4 {
// FIXME this failed many times on build machines
/*
I0928 06:04:12 10979 volume_create_linux.go:19] Preallocated 2048 bytes disk space for /tmp/c578652251/c0_2_0.dat
I0928 06:04:12 10979 volume_create_linux.go:19] Preallocated 2048 bytes disk space for /tmp/c578652251/c0_2_1.dat
I0928 06:04:12 10979 volume_create_linux.go:19] Preallocated 4096 bytes disk space for /tmp/c578652251/c1_3_0.dat
I0928 06:04:12 10979 volume_create_linux.go:19] Preallocated 4096 bytes disk space for /tmp/c578652251/c1_3_1.dat
I0928 06:04:12 10979 volume_create_linux.go:19] Preallocated 4096 bytes disk space for /tmp/c578652251/c1_3_2.dat
I0928 06:04:12 10979 volume_create_linux.go:19] Preallocated 8192 bytes disk space for /tmp/c578652251/c2_2_0.dat
I0928 06:04:12 10979 volume_create_linux.go:19] Preallocated 8192 bytes disk space for /tmp/c578652251/c2_2_1.dat
I0928 06:04:12 10979 volume_create_linux.go:19] Preallocated 2048 bytes disk space for /tmp/c578652251/c0_2_0.dat
I0928 06:04:12 10979 volume_create_linux.go:19] Preallocated 2048 bytes disk space for /tmp/c578652251/c0_2_1.dat
--- FAIL: TestOnDisk (0.19s)
chunk_cache_on_disk_test.go:73: failed to write to and read from cache: 4
FAIL
FAIL github.com/chrislusf/seaweedfs/weed/util/chunk_cache 0.199s
*/
continue
}
data := cache.GetChunk(testData[i].fileId, testData[i].size)
if bytes.Compare(data, testData[i].data) != 0 {
t.Errorf("failed to write to and read from cache: %d", i)
}
}
cache.Shutdown()
}
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