mirror of
https://github.com/ceph/ceph-csi.git
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73 lines
1.5 KiB
Go
73 lines
1.5 KiB
Go
package diskv
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import (
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"compress/flate"
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"fmt"
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"math/rand"
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"os"
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"testing"
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"time"
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)
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func init() {
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rand.Seed(time.Now().UnixNano())
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}
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func testCompressionWith(t *testing.T, c Compression, name string) {
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d := New(Options{
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BasePath: "compression-test",
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CacheSizeMax: 0,
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Compression: c,
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})
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defer d.EraseAll()
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sz := 4096
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val := make([]byte, sz)
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for i := 0; i < sz; i++ {
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val[i] = byte('a' + rand.Intn(26)) // {a-z}; should compress some
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}
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key := "a"
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if err := d.Write(key, val); err != nil {
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t.Fatalf("write failed: %s", err)
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}
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targetFile := fmt.Sprintf("%s%c%s", d.BasePath, os.PathSeparator, key)
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fi, err := os.Stat(targetFile)
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if err != nil {
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t.Fatalf("%s: %s", targetFile, err)
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}
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if fi.Size() >= int64(sz) {
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t.Fatalf("%s: size=%d, expected smaller", targetFile, fi.Size())
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}
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t.Logf("%s compressed %d to %d", name, sz, fi.Size())
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readVal, err := d.Read(key)
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if len(readVal) != sz {
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t.Fatalf("read: expected size=%d, got size=%d", sz, len(readVal))
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}
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for i := 0; i < sz; i++ {
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if readVal[i] != val[i] {
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t.Fatalf("i=%d: expected %v, got %v", i, val[i], readVal[i])
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}
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}
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}
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func TestGzipDefault(t *testing.T) {
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testCompressionWith(t, NewGzipCompression(), "gzip")
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}
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func TestGzipBestCompression(t *testing.T) {
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testCompressionWith(t, NewGzipCompressionLevel(flate.BestCompression), "gzip-max")
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}
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func TestGzipBestSpeed(t *testing.T) {
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testCompressionWith(t, NewGzipCompressionLevel(flate.BestSpeed), "gzip-min")
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}
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func TestZlib(t *testing.T) {
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testCompressionWith(t, NewZlibCompression(), "zlib")
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}
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